If 4p + 3q + 2r = 3 and -4p - 2q - 2r = 4, then q = ? (A) 0
(B) 2
(C) 3
(D) 4
(E) 7

E

Step-by-step explanation:

Label the two equations:

4p +3q +2r= 3 (1)

-4p -2q -2r= 4 (2)

(1) +(2):

4p +3q +2r -4p -2q -2r= 3 +4

Grouping like terms together:

4p -4p +3q -2q +2r -2r= 7

Simplify:

q= 7

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

multiply each one by 3.14

step-by-step explanation: