a is the answer i took the test
How to integrate this?
What is the mean of the numbers 25 30 27 23 and 25?
The mean of the given data set is 26.
One of the most significant and often employed metrics of central tendency is the mean. In mathematics, there are various different kinds of means. In statistics, the mean is the product of all the values in a set of data divided by the total number of values in the data for a particular set of observations.
To put it another way, calculating the mean of a data set only requires adding up all the values and dividing the result by the total number of values.
The mean formula in statistics for a set is defined as the sum of the observations divided by the total number of observations.
Mean = 25+30+27+23+25/5
Mean = 130/5 = 26
Thus, the mean of the given data set is 26.
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The mean formula in statistics for a set is defined as the sum of the observations divided by the total number of observations.
Mean = 25+30+27+23+25/5
Mean = 130/5 = 26
Thus, the mean of the given data set is 26.
these two triangles are similar. if the base of triangle abc is 3 cm and the base of triangle def is 6 cm, and the perimeter of triangle abc is 11 cm, calculate the perimeter of triangle def
The perimeter of triangle def similar to triangle abc is 22 cm.
What is Perimeter?Perimeter is the total distance around a object.
Note: The ratio of the perimeters of two similar figures is equal to the ratio of their corresponding side lengths.
To calculate the perimeter of triangle def, we use the formula below.
Formula:
B/B' = P/P'.................. Equation 1Where:
B = Base of triangle abcB' = Base of triangle defP = Perimeter of triangle abcP' = Perimeter of triangle defFrom the question,
Given:
B = 3 cmB' = 6 cmP = 11 cmSubstitute these values into equation 1 and solve for P'
3/6 = 11/P'P' = 6×11/3P' = 22 cmHence, the perimeter of triangle def is 22 cm.
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At a football game, a vender sold a combined total of 191 sodas and hot dogs. The number of sodas sold was 43 more
than the number of hot dogs sold. Find the number of sodas sold and the number of hot dogs sold.
Number of sodas sold:
Answer:
There were 74 hot dogs and 117 sodas sold.
Step-by-step explanation:
The following equation describes the conditions of the question:
[tex]191=x+(x+43)\\191=2x+43\\[/tex]
where x is the number of hot dogs sold.
Solve for x:
[tex]191=2x+43\\(191)-43=(2x+43)-43\\148=2x\\\frac{148}{2}=\frac{2x}{2}\\74=x[/tex]
There were 74 hot dogs sold and (74+43) or 117 sodas sold.
138 cm² = (x + 2) × ( 2x + 3) x 1/2
Answer:
Step-by-step explanation:
138 cm² = (x + 2) × ( 2x + 3) x 1/2
138 cm² = x + 2 × 2x + ) x 1/2
138 cm² = x + 4x + x * 0.5
0.5/138 cm² = 6x * 0.5 /0.5
6/69cm² = 6x/6
x = 11.5
This might be wrong so just take the square root of 138.
Is triangle ABC = triangle DEF by HL? Explain.
Answer:
If in triangles ABC and DEF, angle A = angle D = right angle, AB = DE (leg), and BC = EF (hypotenuse), then triangle ABC is congruent to triangle DEF.
Your friend asks you for help on a geometry exercise. Your friend's paper is shown to the right. What error did your friend make? Explain.
a.Your friend's paper does not name the triangles correctly for them to be congruent.
b. Your friend's paper shows that the SAS Postulate should be used to show congruence because a pair of congruent angles is included between two pairs of congruent sides.
c. The ASA Postulate cannot be used to prove the congruence of the two triangles as shown because the triangles do not have two pairs of congruent angles.
d.
The ASA Postulate cannot be used to prove the congruence of the two triangles as shown because the included sides between the two pairs of congruent angles are not marked as congruent in both triangles.
Two or more shapes are said to be similar if they have common corresponding properties of sides and/ angles. Thus the error made is option D.
Similar shapes are two or more given shapes that have some common properties with respect to their corresponding sides or angles. So that if on comparing each corresponding sides or angles, and are related, then they are similar. Note that similarity does not imply congruency.
Comparing the sides and angles of the given triangles ΔLMN and ΔQRS, it can be seen that;
Angle Side Angle (ASA) similarity relation implies that the included side between two pairs of congruent angles are similar. Thus, the error made in the diagram is explained in option D.
Option D. The ASA Postulate cannot be used to prove the congruence of the two triangles as shown because the included sides between the two pairs of congruent angles are not marked as congruent in both triangles.
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Which of these numbers is closest to 1?
1.11
A
0.1
B
0.91
C
0.999
D
1.05
E
Answer:
C 0.91 D 0.999 E 1.05 and A 1.11 =1
How do you write 3 more than 5?
“3 more than 5” written as an algebraic expression is “3+5” which is equal to 8.
In a formula or equation involving mathematical operations, the representation of numbers by alphabet is referred to as algebra. Similar to how a statement explains the link between certain words, algebraic equations describe the connection between unknown variables.
We are given a mathematical statement and have to convert it into an algebraic expression using the information above.
3 more than 5 is obtained after adding 5 to the given number which is 3.
So 3 more than 5 is equal to 3+5=8.
Hence “3 more than 5” written as an algebraic expression is “3+5” which is equal to 8.
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How do you find the length of an altitude of an isosceles triangle?
The altitude of an isosceles triangle is sqrt (a^2 - b^2 / 4).
In the triangle ABC, sides AB and AC are equal (say a) and side BC = b. Let us consider the triangle ADC which is the right triangle in the isosceles triangle ABC, and by Pythagoras' theorem,
we get that the altitude AD of the isosceles triangle can be obtained:
AD ^ 2 = AC ^ 2 - (BC / 2) ^2
AD ^ 2 = (a ^ 2 - b ^ 2 / 4)
AD = sqrt (a ^ 2 - b ^ 2 / 4).
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Which expression(s) are equivalent to (5^1/8•5^3/8)^3?O 5 2/3O 5 9/8O 5^3O 5^9
The last expression is equivalent to √5³.
What equation contains an expression?
The equal to sign (=) is the best indicator of whether a given problem is an equation or an expression because it indicates that the problem is an equation.
It is only an expression if there isn't an equal to (=) sign present. It contains data that is used to demonstrate value, such as numbers, variables, and operators.
[tex]= ( 5^{1/8} * 5^{3/8} )[/tex]
[tex]= ( 5^{1/8} * 5^{3/8} ) \\= 5^{(1/8 + 3/8)}[/tex]
[tex]= 5^{4/8}[/tex]
[tex]= 5^{(1/2)}[/tex]
[tex]= [5^{(1/2)}]^{3}[/tex]
Because of the "Power of a power property"
= [tex]5^{3/2}[/tex]
The last expression is equivalent to √5³.
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Dave wrote a whole number greater than 0 and less than 11 on a piece of paper.
Find the probability that Dave's number is each of the following.
6. P(7)
7. P(less than 5)
9. P(less than 1)
10. P(greater than 10)
8. P(odd)
11. P(divisible by 2 or 3)
You draw a card from a deck that has 12 star cards, 8 yellow moon cards,
6 blue moon cards, 9 planet cards, and 1 sun card. Find each of the following.
12. P(moon)
13. P(star)
14. P(blue moon or planet) HOW DO U DO THIS I DONT GET IT
0.03, 0.04, 0.38, and 1 are the figures that could represent an event's likelihood .Probability is calculated by dividing the total possible outcomes by the number of outcomes that are theoretically possible
How does probability work exactly?Probability is calculated by dividing the total possible outcomes by the number of outcomes that are theoretically possible. Probability differs from odds in this regard. Calculating odds involves dividing the likelihood of a particular event by the likelihood that it won't occur.
How do probability and an example work?The likelihood of success is a measure of probability. the number of potential outcomes. For instance, the chance of flipping a coin and obtaining heads is 1 in 2, as there is only one way to acquire a head and there are a total of 2 possible outcomes (a head or tail). We specify P(heads) = 12.
6. P(7) = 1/10
7. P(less than 5) = 4/10 = 2/5
8. P(greater than 10) = 5/10 = 1/2
11. P(divisible by 2 or 3) = 6/10 = 3/5
12. P(moon) = 8/36 = 2/9
13. P(star) = 12/36 = 1/3
14. P(blue moon or planet) = (6+9)/36= 15/36= 5/9
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Answer:
Step-by-step explanation:
6. P(7) = 1/10
7. P(less than 5) = 4/10 = 2/5
8. P(greater than 10) = 5/10 = 1/2
11. P(divisible by 2 or 3) = 6/10 = 3/5
12. P(moon) = 8/36 = 2/9
13. P(star) = 12/36 = 1/3
14. P(blue moon or planet) = (6+9)/36= 15/36= 5/9
What kind of sequence is 3/6 12 24?
This is an arithmetic sequence. In this sequence, the common difference is 6 (12 - 3/6 = 6).
What is sequence?A sequence is an ordered arrangement of objects or events which follow one another in a specific order. This order can be based on a mathematical rule or pattern, such as a sequence of numbers, or it can be based on physical or temporal characteristics of the objects or events, such as the order in which they appear in a movie or story. Sequences are useful for representing and analyzing data, as well as for visualizing relationships between objects. They can also be used to model problems, such as predicting the future or solving a puzzle.
This is an arithmetic sequence. An arithmetic sequence is a sequence of numbers in which each term after the first is found by adding a constant, called the common difference, to the preceding term. In this sequence, the common difference is 6 (12 - 3/6 = 6).
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What is the arithmetic mean of the data set 11 12 13 14 15 16 17 18 19 and 20?
The arithmetic mean of the set of numbers 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 is 15.5. This is the average value of the set, and it is affected by all the values in the set.
The arithmetic mean, also known as the average, of a set of numbers is found by adding up all the numbers in the set and dividing by the total number of numbers in the set. In this case, the set of numbers is 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20. When we add up all the numbers in the set, we get a total of 155. There are 10 numbers in the set, so the average is 155 / 10 = 15.5.
To find the arithmetic mean, we first need to add up all the numbers in the set. Then, we divide that sum by the total number of numbers in the set. This gives us the average value of the set.
In summary, the arithmetic mean of the set of numbers 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 is 15.5. This is the average value of the set, and it is affected by all the values in the set.
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A copy machine makes 28 coples per minute. How long does it take to make 126 copies?
Answer: 4.5 minutes
Step-by-step explanation:
Take 126 divided by 28 = 4.5 minutes
Is AAA a postulate or theorem?
The AAA (angle-angle-angle) similarity theorem states that two triangles' corresponding angles are identical if and only if their corresponding sides are proportionate.
Knowing two angles, such as 32° and 64°, we may calculate the following angle, which is 84°, since 180-(32+64)=84. (This is commonly referred to as the AAA Postulate—which is valid in every way, although two angles are more than enough.) Working backwards will help you understand the proposition better.
The sides and angles of a set of triangles must be equal for them to be congruent. The sides of a triangle with all respective angles equal, i.e. AAA condition, may or may not be equal.
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Question Simplify. 13(5x−8)+23x
Answer:
8(11x-13)
Step-by-step explanation:
[tex]13(5x-8)+23x\\65x-104+23x\\88x-104\\8(11x-13)[/tex]
Use point-slope form to write the equation of a line that passes through the point (-1, 10) with slope 11/9
The equation of the line that passes through the given points will be equal to 11x -9y + 101 = 0.
What is the slope?It is possible to determine a line's direction and steepness by looking at its slope. Finding the slope between lines inside a coordinate plane can aid in anticipating if the lines are perpendicular, parallel, or none at all without physically using a compass.
As per the data in the question,
Use the equation of the line passing through the point (x₁, y₁) with slope m will be:
y - y₁ = m(x - x₁)
Slope, m = 11/9
And, the points are (-1, 10)
Now,
y - 10 = 11/9(x + 1)
9y - 90 = 11x + 11
11x - 9y + 11 + 90 = 0
11x -9y + 101 = 0
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A system of equations is shown on the graph below.
How many solutions does this system have?
The system has no solution.
What is linear equations?
The standard form for linear equations in two variables is Ax+By=C. For example, 2x+3y=5 is a linear equation in standard form. When an equation is given in this form, it's pretty easy to find both intercepts (x and y)
We know that
The solution of the system of two linear equations, is the intersection point both lines.
In this problem
The lines are parallel, the lines don't intersect
therefore
The system has no solution
Remember that, if two lines are parallel then their slope are equal
Verify that the slopes are the same
Blue line
take the points (0,2) and (-2,0)
[tex]m=(0-2) /(-2-0)=1[/tex]
Red line
take the points (0,-3) and (3,0)
[tex]m=(0+3) /(3-0)=1[/tex]
The slopes are equal
The lines are parallel
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By what percent will the product of two numbers decrease if one of them is increased by 30% and the other is decreased by 30%?
Answer:
9% decrease
Step-by-step explanation:
Hope this helps!
What is expression example?
An example expression is the following:
$100 + $50n
What is an algebraic expression?An algebraic expression is a set of letters and numbers, in which the letters are called variables and take on an unknown value, the numbers are coefficients or independent terms while the variables are dependent terms.
We will write an algebraic expression to exemplify what has just been defined, with a verbal example.
A person has a business, and he adds $100 to the box (and his sales are on average $50 per hour, with this we build the expression of total income:
$100 + $50n
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What are 3 examples of value?
Thousands, hundreds and tens are three examples of values and there are many more.
What is value?Value in mathematics is a number that represents the outcome of a computation or function. In the aforementioned example, you may inform your teacher that 5 + 6 Equals 30 or that x + y = 9 if x = 6 and y = 3. A variable or constant can also be referred to as a value.
What is the value of 4?The number 4 is in this case in the tens column. As a result, the place value of the number four is tens or tens.
Thousands, hundreds and tens are three examples of values and there are many more like ones etc. Moreover after solving any problem for unknown variable the resulting numerical solution can also be termed as value.
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How do you find the value of x and y in a triangle?
On solving the provided question, we can say that the value of x = 5√3
and value of y = 10.
How to find the value of x and y?
To find the values of x and y, you will need to use
the Pythagorean theorem,The trigonometric ratio: soh-cah-toa, andspecial values of trigonometric functions.According to the given question:
Using the table of trig values, we find that
sin30°=1/2
So, this gives us:
1/2 = sin 30° = 5/y
1/2 = 5/y
(1xy)/2 = 5
y= 2×5 =10
Next, using the Pythagorean Theorem, we find that
5²+x²=10²
x²=100−25=75
Solve for x:
x=√75=√3×25=5√3
Complete question:
How do you find the value of X and Y. Y is the hypotenuse, 5 is the adjacent side and X is the opposite side from Y, and in the triangle there is 30 degrees where X and Y lines meet?
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What does 4 3 mean in math?
43 in arithmetic stands for multiplying 4 by three. Suppose x =43; then, x+4*4*4.
What is the power of numbers?If the power is positive, multiply the integer by itself that many times. If the power is negative, multiply the reciprocal of the integer by itself that many times. If the power is 0, the result is always 1.
Are 3 and 9 three the same?No, 3:9 and 9:3 are not equivalent. 3^9=19683 and 9^3=729.
4^3=4*4*4\s =16*4\s =64
Which one—math or maths—is correct?In the US and Canada, math is the word of choice. In the United Kingdom, Ireland, Australia, and other English-speaking countries, math is the preferred term. There isn't really a rational reason why math grew more popular in certain locations while maths was elsewhere.
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The football team is selling gift cards in increments of $25 and $50. If they sold $6,000 worth of gift cards which equation could be used to determine how many $50 gift cards, g, were sold if 180 gift cards were sold in the $25 amount?
A 4,500 + 50g = 6,000
B 25 + 50g = 6,000
C 4,500 - 50g = 6,000
D 25g - 50(180) = 6,000
Answer:
A. 4,500 + 50g = 6,000
Step-by-step explanation:
25(18) + 50(g) = 6000
4500 + 50g = 6000
The correct option is A.
State the area of the given triangle.
A: 28 Square Units
B: 24 Square Units
C: 60 Square Units
D: 36 Square Units
Answer:
24 Square Units (B)
Step-by-step explanation:
⭐ The formula for the area of any triangle is: 1/2(bh), where b = base, and h = height.
⭐ The height of a triangle is the triangle's altitude, which can be denoted by a straight line with a right angle. In this problem, the height is given to you.
Let's substitute what we are given to find the area.
area = 1/2(bh)base = 12 square unitsheight = 4 square unitsarea = 1/2(12*4)area = 1/2(48)∴ area = 24 square unitsWhat are the factors of x³ 21x 20?
Therefore , the factors of the given equation are (x + 4), (x - 5) and (x + 1)
What is equation?The equal sign is used between numerical or changeable expressions to create an equation, such as 3x+5=11.
A number that can be entered as the variable's replacement in an equation serves as the solution.
Here,
The first term, x2, has a coefficient of 1 and is the starting term.
The coefficient of the middle word, +5x, is 5, thus
"The constant," the final word, is +4.
Step 1: Multiply the first term's coefficient by the formula 1 + 4 = 4.
Step 2 is to identify two factors of 4 whose sum equals the middle term's coefficient, which is 5.
-4 + -1 = -5
-2 + -2 = -4
-1 + -4 = -5
4 + 1 = 5
Step 3: Rewrite the polynomial by separating the middle term into the two parts 1 and 4 x2 + 1x + 4x + 4 discovered in Step 2 above.
Step-4 : adding the first two terms while excluding similar elements
x • (x+1)
Adding the last two terms together and finding commonalities:
4 • (x+1)
Step-5 : In step 4, add up the four terms:
(x+4) • (x+1)
Which is the desired factorization
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a 2 kg block is placed at the top of an incline and released from rest near earth’s surface and unknown distance h above the ground. the angle θ between the ground and the incline is also unknown. frictional forces between the block and the incline are considered to be negligible. the block eventually slides to the bottom of the incline after 0.75 s. the block’s velocity v as a function of time t is shown in the graph starting from the instant it is released. how could a student use the graph to determine the total energy of the block-earth system?
Therefore , the distance travelled by the 2kg block is 281.25m and the energy of the block earth is 14.0625 J
What is force?It can push or pull. Acceleration is caused by unbalanced forces.
The Newton is the symbol for a force (abbreviation is N).The force required to cause a mass of one kilogramme to alter its velocity by one metre per second (m/s) per second is one Newton. The formula is: 1 N = 1 kg m/s2 (kilogram metre per second squared)
Here,
Let s represent the block's total distance travelled.
As a result, the block's work will be equal to the potential energy contained in the spring.
It is given as,
(mgsinθ)×s= 1/2 k[tex]x^{2}[/tex]
( √2 ×10×sin45 ∘ )×s= 1/2 ×100 x (0.75*0.75)
s=281 . 25m
Thus, the distance travelled by the block is 281 . 25m.
For energy :
=> 1/2 m v^2
=> 1/2 * 2* (3.75)^2
=> 14.0625 J
Therefore , the distance travelled by the 2kg block is 281.25m and the energy of the block earth is 14.0625 J
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The distance travelled by the 2kg block is 281.25m and the energy of the block earth is 14.0625 J
What is meant by work in physics?When an object is moved over a distance by an external force, at least a portion of that force must be applied in the direction of the displacement. This is known as work in physics.
Define energy.The ability to exert a force that causes an item to move is what is meant by the definition of energy as the "power to accomplish work."
Let s= total distance travelled by block.
Therefore, the block's work will be equal to the spring's potential energy.
According to given information,
(mgsinθ)×s= 1/2 k
( √2 ×10×sin45 )×s= 1/2 ×100 x (0.75*0.75)
s=281 .25m
Therefore, the distance travelled by the block is 281 . 25m.
For energy we have:
=> E= 1/2 m v^2
=> E= 1/2 * 2* (3.75)^2
=>E= 14.0625 J
So , the distance travelled by the 2kg block is 281.25m and the energy of the block earth is 14.0625 J.
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Sandy works at a clothing store. She makes $9 per hour plus earns 15% commission on her sales. She worked 73 hours over the last two weeks and had a total of $2,830 in sales before taxes.
Which of the following is closest to how much she will earn in hourly wages and commission for those two weeks?
If Sandy works at a clothing store. She makes $9 per hour plus earns 15% commission on her sales. The amount that is closest to how much she will earn in hourly wages and commission for those two weeks is A $592.
What is earnings?Earnings can be defined as the money a person earn as wages or as salary.
First step is to find the amount that Sandy earns per hours
Earnings per hour = 9+ (0.15×9)
Earnings = $10.35 per hour
Second step is to find her earnings
Earnings =73 × $10.35
Earnings = $755.55
Closest amount is $592.
Therefore the correct option is A.
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The complete question is:
Sandy works at a clothing store. She makes $9 per hour plus earns 15% commission on her sales. She worked 73 hours over the last two weeks and had a total of $2,830 in sales before taxes.
Which of the following is closest to how much she will earn in hourly wages and commission for those two weeks?
A $592
B $890
C $386
D $298