Devon babysits x hours a week after school for 5$ an hour, and also has a job as a cashier y hours a week for $10 an hour. he wants to earn atleast 70$. he can’t work any more than 10 hours a week because of school.

x hours for babysitting

5$ an hour

= 5x

y hours for cashier

$10 an hour

= 10y

Earn atleast 70$

= 5x + 10y ≥ 70$

Can’t work any more than 10 hours a week

= x + y < 10 hours

Inequality equation for the given statements is:

5x + 10y ≥ 70$ and x + y < 10 hours

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have