Is the function linear or nonlinear

Y=2x²-4

Using coupons, you spend $135 grocery shopping. this is 75% of the total retail price of the groceries. how much would you have spent if you had not used the coupons?

Which answer correctly estimates the quotient of 102.02 : 4.011? a. about 25 b. about 250 c. about 2,500 d. about 25,000

A student uses 3.14 for π to calculate the approximate circumference of a circle, 150.72 meters. Given this, find the approximate area of the circle. Use 3.14 for π.

Gavin plays a soccer video game he earns 2 stars for every goal he scores and loses 1/2 star every time he misses a goal He scores 7 goals and misses 6 goals. How many stars does he have

The half-life of radium is 1690 years. If 20 grams are present now, how much will be present in 250 years?

Which of the following are true about regression with one predictor variable (often called "simple regression") ? A.

15 multiplied by 1/5

Write a number with the digit 8 in the tens place

A 4-foot-wide walkway surrounds a 10-foot square wading pool. What is the perimeter of the outside of the walkway?

Find the difference. (-ab+8a-5) - (-8ab-4)