Select all of the following that are quadratic equations.

3 x^2 + 5 x - 7 = 0

x^3 - 2 x^2 + 1 = 0

2 x - 1 = 0

5 x^2 + 15 x = 0

6 x - 1 = 4 x + 7

x^2 - 4 x = 4 x + 7

Amanda has at most $40 to spend on flowers. She wants to buy a pair of red rose flowers for $18 dollars and spend the rest on lily flower. Each lily flower costs $11. Write an inequality for the number of lily flowers she can purchase

Suppose a normal distribution has a mean of 222 and a standard deviation of 16. What is the probability that a data value is between 174 and 238? Round your answer to the nearest tenth of a percent. A. 66.9% B. 53.3% C. 84.0% D. 91.0%

How do you write out 3 1/4 times 24

A person's birth date consists of the month, day, and year in which that person was born. The domain for a relation R is a set of people. No two people in the group have the same birth date.

Melanie walked her dog 2 1/5 miles. Cathy walked her dog 1 3/4 times as far as Melanie did. How many more miles did Cathy walk her dog?

Find the volume of the solid. 6 cm 8cm 15 cm

For a machine, the output force is 20 N, and the output distance is 4 m. Which must be true about the work input? A. It equals 80 J. B. It must be greater than 80 J. C. It must be less than 80 J.

Which sentence correctly uses commas? A) She shouted "Go team," before getting up from her seat. B) She shouted "Go team!" before getting up, from her seat. C) She shouted, "Go team!" before getting up from her seat.

A telephone company charges $4.95 per month for long distance calls plus $0.05 per minute. the monthly cost c of long distance calls can be described by the equation c = 0.05m + 4.

Use a calculator to find an approximate solution to the equation. 7ln (x + 2.8) = 11.2