MATHEMATICS HIGH SCHOOL

Reflectional symmetry is the qualitya design has if it maintains all characteristics when it is rotated about:

A. an edge lying in its plane.
B. an axis lying in its plane.
C. a point lying in its plane.
D. an axis lying in its opposite plane.

Answers

Answer 1
Answer: The right answer for the question that is being asked and shown above is that: "D. an axis lying in its opposite plane."  Reflectional symmetry is the quality a design has if it maintains all characteristics when it is rotated about D. an axis lying in its opposite plane.
Answer 2
Answer:

Answer: c - a point lying on its plane

Step-by-step explanation:

i don’t know why i just know it’s right unless it’s not

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Can Miguel use 3/4 inch strips to make a line that is exactly 5 inches long.Explain

Answers

No:
0.75+0.75=1.5
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Paul drove for one and a half hours at 65 mph before he realized he had forgotten his wallet. How far was he from home?

Answers

He drove for one and half hours = 1  1/2 = 1.5 hours.

Speed = 65 miles per hour.

Distance = Speed * Time

Distance = 65 miles/hour  * 1.5 hours

Distance = 97.5 miles

So Paul was 97.5 miles from home.

In a recent poll, 32% of the referees who were surveyed said that ejecting angry coaches was their favorite thing to do. If 152 referees gave this response, how many were surveyed in total?

Answers

Answer: 475 referees were surveyed in total.

Step-by-step explanation:

Let x represent the number of referees that were surveyed.

In a recent poll, 32% of the referees who were surveyed said that ejecting angry coaches was their favorite thing to do. This means that the number of referees that gave this response is

32/100 × x = 0.32 × x = 0.32x

If 152 referees gave this response, then the total number of referees that were surveyed would be

0.32x = 152

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Cos A = square root 21 divided by 5 and sin A = 2/5. What is the exact value of cos 2A?

Answers

cos\alpha=(√(21))/(5);\ sin\alpha=(2)/(5)\n\n\ncos2\alpha=cos^2\alpha-sin^2\alpha\n\ncos^2\alpha=\left((√(21))/(5)\right)^2=(21)/(25)\n\nsin^2\alpha=\left((2)/(5)\right)^2=(4)/(25)\n\ncos2\alpha=(21)/(25)-(4)/(25)=(17)/(25)

Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

I hope its clear. Does this help??

The base of a right prism is a square with edge 4 . The volume is 128 . The height is ?

Answers

Volume = (length) x (width) x (height)

Height = (Volume) / (length x width) = 128 / (4 x 4) = 128/16 = 8 .
h =128/(4^2) \n =128/16 \n =8
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