$15 I believe, apologies if incorrect!
The answer is D! good luck
Answer:
-10
Step-by-step explanation:
Let x = number
10 less than a number is the same number doubled
x-10 = 2x
Subtract x from each side
x-10-x = 2x-x
-10 = x
The number is -10
,14,21,28,35,42,49,56,63,70,
Say that you buy 30 apples for $20, you take how many apples there are and divide it by how much they cost, they cost $1.5 per apples (looks like this, Unit/Rate)
