If f(n) = f( n-1 ) + 7 and f(1) = -18 then f(5) = ?

10

Step-by-step explanation:

A faster way is to take the common additive (7) times the difference in n, in this case (5-1 = 4)

d (5 x (-20)) * (100 x (0.7))

step-by-step explanation:

5÷1/100 * -.7 *-20

copy dot flip

5*100 * -.7 *-20

rearrange

5*-20   * 100 *-.7

-100   *-70

7000

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer