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dimaraw [331]
3 years ago
7

On a math exam containing 36 questions, there are

Mathematics
1 answer:
viva [34]3 years ago
4 0

Answer:

22

Step-by-step explanation:

You might be interested in
an athletic facility is building an indoor track. the track is composed of a rectangle and two semicircles, as shown. a) write a
stepan [7]

Answer:

(a) P = 2x + 2r + 2πr

(b) x = ½(P - 2r - 2πr)

(c) x = 123 feet

Step-by-step explanation:

See Attachment for sketch of the track

Solving for (a): Perimeter of the track

This is calculated by adding the perimeter of the rectangle to the 2 semicircles as follows.

P = Perimeter of Rectangle + Perimeter of 2 Semicircles

P = 2(x + r) + 2 * πr

[Where r is the radius of both semicircles]

Open bracket

P = 2x + 2r + 2πr

Solving for (b): Formula for x

P = 2x + 2r + 2πr

Make x the subject of formula

2x = P - 2r - 2πr

Divide both sides by 2

x = ½(P - 2r - 2πr)

Solving for (c): the value of x when r = 50 and P = 660

Substitute the given values in the formula in (b) above

x = ½(P - 2r - 2πr)

x = ½(660 - 2 * 50 - 2π * 50)

x = ½(660 - 100 - 100π)

x = ½(560 - 100π)

Take π as 3.14

x = ½(560 - 100 * 3.14)

x = ½(560 - 314)

x = ½ * 246

x = 123 feet

6 0
3 years ago
Please help you will get 10 points and brainliest. and explain your answer.
alekssr [168]

Answer:

Top prism = 262 in.² Bottom prism = 478 in.²

Step-by-step explanation:

top prism:

front + back: 5 x 3 = 15

sides: 19 x 4 x 2 = 152

bottom: 19 x 5 = 95

15 + 152 + 95 = 262

bottom prism:

front + back: 5 x 6 x 2 = 60

sides: 19 x 6 x 2 = 228

top + bottom: 19 x 5 x 2 = 190

60 + 228 + 190 = 478

6 0
3 years ago
What's 21v+8-12v-7+3t-1t
kow [346]
21v + 8 - 12v - 7 + 3t - 1t = (combine like terms)

9v + 2t + 1 <==
8 0
3 years ago
What is the sum of 21 and 5 times a number f is 61
sukhopar [10]

Answer:

Answer is below

Step-by-step explanation:

21 + 5f = 61       Turn the words into an equation

-21        - 21       Subtract 21 from both sides

5f = 40              Divide both sides by 5

f = 8

If this answer is correct, please make me Brainliest!

5 0
3 years ago
Read 2 more answers
Subtract 3x^2+8x3x <br> 2<br> +8x from -9x^2+3x-8−9x <br> 2<br> +3x−8
r-ruslan [8.4K]

Answer:

oogla boogla

Step-by-step explanation:

5 0
4 years ago
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