Jacob and sarah are saving money to go on a trip. they need at least $2000 in order to go. jacob mows lawns and sarah walks dogs to raise money. jacob charges $20 each time he mows a lawn and sarah charges $10 each time she walks a dog.
write an inequality to model the problem, with x representing the number of lawns mowed and y representing the number of dogs walked.

Step-by-step explanation:

Let x represent the number of lawns Jacob mowed and y represent the number of dogs Sarah walked.

Jacob charges $20 each time he mows a lawn, then he earns $20x for x lawns mowed.

Sarah charges $10 each time she walks a dog, then she earns $10y for y dogs walked.

In total, they will earn $(20x + 10y). They need at least $2000 in order to go on a trip, then

Note that

C. 35 yellow books

Step-by-step explanation:

Let u be 1 unit.

3u = 21

u = 21÷3

=7

5u = 7×5

= 35