15% of the number of marbles in a box is 30 marbles. How many marbles are there in the box? *

200

Step-by-step explanation:

Let the amount of marbles in the box be m.

15/100m = 30

15m/100 = 30

15m = 3000

m = 200

Checking

15% * 200 = 30

(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation:

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb