MATHEMATICS HIGH SCHOOL

If A and B are complementary angles and A = (8x+20), B = (7x-5) find A

Answers

Answer 1
Answer:

Answer:

m∠A = 60°

Step-by-step explanation:

Complementary Angles add up to 90°

Step 1: Set up equation

8x + 20 + 7x - 5 = 90

Step 2: Solve for x

15x + 15 = 90

15x = 75

x = 5

Step 3: Find m∠A

m∠A = 8x + 20

m∠A = 8(5) + 20

m∠A = 40 + 20

m∠A = 60°

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There were 20 apples in the bag. Rachel used 2/5 of the apples for a pie. Hermother used 1/2 of the apples for apple crisp. How many apples are left in
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Answers

Answer : 2 apples

Step by step explanation:

2 a) Seth wants to buy a skateboard that costs $ 169. I have $ 88 in the bank. If he earns $ 7.25 an hour pulling weeds, how many hours will Seth have to work to earn the rest of the money needed to buy the Skateboard? Show or explain how you found your answer. (b) Seth wants to buy a helmet as well. A new helmet costs $ 46.50. Thinkseth thinks he can work 6 hours on Saturday to earn enough money to buy the helmet. Is he correct? Show or explain how you found your answer. (6) Setn s third goal is to join some friends on a trip to see a skateboarding show. The cost of the trip is about $ 350. How many hours will Seth need to work to afford the trip? Show or explain how you found your answer.

Answers

Answer:

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Name the line and plane shown in the diagram.

Answers

the correct answer would be c

the answer is PQ and plane SP

What is the length of BC in the right triangle below 21 and 72

Answers

Im guessing 21 and 72 are the side lengths for the triangle?

Alright, so since it's a right triangle you can use the Pythagorean theorem or a^2+b^2=c^2

Since i cant see the picture, im going to use some general math so i can figure out if those two sides are the legs or if one of them is the hypotenuse
Alright 
so im guessing the side we're trying to find is the hypotenuse

21^2+72^2=c^2
441+5184=c^2
5625=c^2
√5625=c
75=c

The answer is 75, hope i helped!

Answer:75

Step-by-step: just took the test

The width of a rectangular pool is 5 meters longer than the length. The perimeter of the pool is 58 meters. Use and equation to find the pools length.

Answers

the perimeter of a rectangular pool = 2l + 2w

If the width is 5m longer than the length, 

Then Perimeter = 2(l + 5) + 2l
                          = 4l + 10  {THE EQUATION}

Since Perimeter = 58 m
Then 4l + 10 = 58 m

⇒  l  =  12 m

Thus the Length of the Pool = 12 m

The product of three integers is −5. Determine all of the possible values for the three factors.

Answers

-1,1,5
-1,-1,-5
1,1,-5
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