C-30 and d-8 then 2c + 4d-

92

Step-by-step explanation:

2c + 4d =

c = 30, so we substitute 30 for c in the expression 2c + 4d.

d = 8, so we substitute 8 for d in the expression 2c + 4d.

2c + 4d =

= 2 * 30 + 4 * 8

= 60 + 32

= 92

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!