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
<u>Answer: He spends on ballet lesson $30.</u>
Answer:
Choice A) Reflection over a diagonal line. The mirror line is y = -x.
Step-by-step explanation:
hope it helped
Answer:
Option F: $71.43 is the correct answer.
Step-by-step explanation:
By the question we can observe that 35% of regular price is $25 so this information will be used to calculate the original price of the shoes.
Let
P be the price of shoes
and d be the discount
So
The discount is 35% of P so
Rounding off to the nearest hundredth
The regular price is: $17.43
Hence, option F: $71.43 is the correct answer.