Need the answers step by step for 6-9

6. 2

7. 13

8. 10

9. -29.78

Step-by-step explanation:

6. 3(1) - 1

3-1

2

7. -2(-2)+9

4 + 9

13

8. 2(3) + 4

6 + 4

10

9. 3.8(-7.6) - .9

-28.88 - .9

-29.78

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

its a straight line parallel to the time axis