MATHEMATICS HIGH SCHOOL

Let v = 25.What is the value of v – 5?

A.
5

B.
20

C.
25

D.
30

Answers

Answer 1
Answer: the answer is B because 25-5=20

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Please Help!?!4. A data set has a variance of 42.

What is the standard deviation of the data set?

Round to the nearest tenth.



Question 5.5. What is the standard deviation of the data set? Round your answer to the nearest tenth.

6 4 9 5 5 4 5

(Points : 1)
1.6
1.7
5.4
5.0

Answers

Answer:

Step-by-step explanation:

(A) It is given that a data set has a variance of 42, then the standard deviation is given as:

SD=√(variance)

⇒SD=√(42)

⇒SD=6.48

Thus, the standard deviation of the given data set is 6.48.

(B) The given data set is:

6 4 9 5 5 4 5

Mean of the given data set is:

Mean=(6+4+9+5+5+4+5)/(7)

Mean=(38)/(7)

Mean=5.42

Data set                                                            (x-\overline{x})^2

6                                                                                0.33

4                                                                                2.01

9                                                                               12.81

5                                                                               0.17      

5                                                                               0.17    

4                                                                                2.01

5                                                                               0.17    

The variance is given as:

V=(0.33+2.01+12.81+0.17+0.17+2.01+0.17)/(7)

V=2.52

Thus, the standard deviation is given as:

SD=√(variance)

⇒SD=√(2.52)

⇒SD=1.6          

Hence, option A is correct.                  

Q4 . Standard deviation is square root of variance so, the standard deviation of the given data set is , \sqrt { 42 } which is equal to 6.48074069841

Q5.5 

To find the standard variation first find the mean of the set.

6+4+9+5+5+4+5 = 38 

\frac { 38 }{ 7 } =5.42

Then we will subtract the mean from each number in the set, then will square that. Then we will add those all. 

Solution is in the pic. Sorry if this was not explanatory enough.

Ask me if you wanna know more.

the measure of angle 1 is twice the measure of angle 2, and angle 1 and angle 2 are linear pair. Find the measure of angle 1.

Answers

Answer:

m<1=120

Step-by-step explanation:

A linear pair adds up to 180 degrees.

So <1+<2=180

Let <2=X, that would make <1=2X because <1 is 2 times more.

So substitute that into the equation.

2x+x=180.

Combine like terms and get 3x=180

Divide both sides by 3 and get x=60.

Substitute that into <1 and get <1=120

Final answer:

Given that angle 1 and angle 2 forms a linear pair and angle 1 is twice angle 2, we can calculate angle 1 to be 120 degrees.

Explanation:

The subject of this question is Mathematics, specifically geometry. A linear pair of angles means that the two angles add up to 180 degrees. If the measure of angle 1 is twice the measure of angle 2 as stated in the question, we can represent this in equation form as 2x (angle 1) + x (angle 2) = 180.

Combining like terms, we get 3x = 180. Now, solve for x by dividing both sides by 3. Therefore, x equals 60 degrees. But the question asks for the measure of angle 1, so we substitute x into the equation 2x = angle 1. Therefore, angle 1 is 120 degrees (2 * 60).

Learn more about angle measure here:

brainly.com/question/33833061

#SPJ3

Which describes the calculations that could be used to solve this problem? Lauren has 42 muffins to pack into boxes and bags. She has one box that will hold 12 muffins. She will put the rest of the muffins into bags. She wants to put 3 muffins into each bag. How many bags of muffins will Lauren be able to make? A. Subtract 42 – 12. Then multiply the difference by 3. B. Add 3 + 12. Then add 42 to the sum. C. Add 42 + 12. Then divide the sum by 3. D. Subtract 42 – 12. Then divide the difference by 3

Answers

The correct answer is D, 'Subtract 42 - 12. Then divide the difference by 3'. Lauren has 42 muffins, and she can put 12 of them into a box, leaving her with 30 muffins to fit into bags. If she can fit 3 muffins in each bag, and she wants to know how many bags she needs, then she needs to divide 30 by 3 to get 10. This means that she will need 10 bags of 3 muffins to completely pack 30 muffins. She started with 42, but 12 of those fit into the original box, so we don't have to worry about it.

Hope this helps!
D
if my calculations are correct
hope this helped

A horse that weighs 1 1/4 tons is carrying a 110 pound person, a 15 ounce water bottle, and a 16 1/2 pound basket what is the weight of the horse, rider, and items in total?

Answers

Answer:

2635.875pounds

Step-by-step explanation:

Converting all the units to pounds for unit consistency. Let's convert

1 1/4tons horse weight and 15ounce water bottle to pounds.

According to the conversion;

1 ton = 2000pounds

1 1/4 tons = (2000×5/4)pounds = 2500pounds

Similarly for the conversion of ounce to pounds;

1 ounce = 0.625pound

15 ounces of water bottle = (0.625×15)pounds

= 9.375pounds

The total weight of the horse, rider, and items in total will give;

2500pounds horse + 110pounds person + 9.375pounds water bottle + 16.5pounds basket

= 2635.875pounds

The image of a parabolic lens is traced onto a graph. The function f(x) = (x + 8)(x – 4) represents the image. At which points does the image cross the x-axis?A.(–8, 0) and (4, 0)
B.(8, 0) and (–4, 0)
C.(2, 0) and (–1, 0)
D.(–2, 0) and (1, 0)

Answers

The right answer for the question that is being asked and shown above is that: "B.(8, 0) and (–4, 0).' The image of a parabolic lens is traced onto a graph. The function f(x) = (x + 8)(x – 4) represents the image. At B.(8, 0) and (–4, 0) points does the image cross the x-axis.

Answer:

A

Step-by-step explanation: b is wrong a is right I took the test

Can anyone help me on this question ?

Answers

Answer:

5.7 units

Step-by-step explanation:
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