If cos theta=-√3/2 and 90°< theta<180°, then theta=?

Write y=-3x^2-18x-31 in vertex form

What is the greatest common factor of 28 and 11

Alonzo rented a truck for one day. There was a base fee of $15.99, and there was an additional charge of 89 cents for each mile driven. Alonzo had to pay $184.20 when he returned the truck. For how many miles did he drive the truck?

There are 80 students in a speech contest. Yesterday, 1/4 of them gave their speeches. Today, 3/5 of the remaining students gave their speeches. How many students still haven't given their speeches?

Seth is going to be a junior in high school, and the college he wants to go to costs $9,264 for tuition the first year. Seth's parents have a savings account that will cover 75% of his first year's tuition, and the rest Seth will need to pay for.

In a certain normal distribution of scores, the mean is 50 and the standard deviation is 6. Find the z-score corresponding to a score of 60 a. - 1.67 b. 10.0 c. 1.67 d. 8.33

Phillip has x marbles. His father gave him 2 times the number of marbles he has. Now he has 21. How many marbles did Phillip have before?

IThe first three terms of a sequence are given. Round to the nearest thousandth (if necessary). 72, 24, 8, ... Find the 8th term.

A cannery processed 735 pounds of strawberries in 3.5 hours. The cannery processed 2100 pounds in 10 hours. a. Write an equation using function notation to model the weight of strawberries s processed in t hours. b.

At Kent Middle School, there are 104 students in the band and 80 students in the choir. What percent of the number of students in the choir is the number of students in the band