Rockjaw spends a total of $80 each week for karate lessons and ballet lessons. If the amount spent on karate lessons increases $10 next week, it will be twice the amount spent on ballet lessons. How much does he spend on ballet lessons?

x - cost of karate lessons

y - cost of ballet lessons

{x + y = 80

{x + 10 = 2y

{x = 80 - y

{80 - y + 10 = 2y

{x = 80 - y

{90 - y = 2y          | + y

{x = 80 - y

{90 = 3y            | : 3

{x = 80 - y

{y = 30

{x = 50

{y = 30

He spends on ballet lesson $30.

domain is all the x values included in the

0 ≤ x ≤ 2

range is all the y values of the graph

-2 ≤ y ≤ 2

***keep in mind that there are different ways to show domain and range

hope this !

~just a girl in love with shawn mendes

4

step-by-step explanation:

6 (donuts) divided by 3 is 2.

so 2/3 means 2 times 2, which is 4/6.

you get two and your friend gets four.