Solve for P: Q = 30 - 2P?

2009-09-05 5:19 pm

which one is it and explain if you can...

A. P = 30 - 2Q

B. P = 15 - 2Q

C. P = 30 - Q

D. P = 30 + Q

E. P = 15 - 0.5Q

回答 (7)

2009-09-05 6:55 pm

✔ 最佳答案

2 P = 30 - Q

P = 15 - Q/2

OPTION E

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2009-09-05 5:27 pm

DO YOUR OWN HOMEWORK!

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2016-05-19 11:41 am

Easiest way: Q = 30 - 2P Add 2P Q + 2P = 30 (- 2P + 2P) Q + 2P = 30 Subtract Q 2P = 30 - Q Divide by 2 P = 15 - (Q/2)

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2009-09-05 6:00 pm

Q = 30 - 2P
30 - Q = 2P
P = (30 - Q)/2
P = 30/2 - Q/2
P = 15 - 1/2(Q)
P = 15 - 0.5Q
(answer E)

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2009-09-05 5:29 pm

Q = 30 - 2p
subtract 30 from both sides
Q-30=-2p
then divide both sides by -2
-1/2Q + 15=P
which is the same as E
15-1/2Q=P

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2009-09-05 5:28 pm

Q = 30 - 2P
Q - 30 = 30 - 2P - 30
Q - 30 = -2P
(Q - 30)/-2 = (-2P)/-2
-0.5Q + 15 = P
P = 15 - 0.5Q

Answer: E

參考: *

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2009-09-05 5:23 pm

Q = 30 - 2P (subtract 30 from both sides)
Q - 30 = -2P (divide both sides by -2)
-0.5Q + 15 = P

ANSWER: E. P = 15 - 0.5Q

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