Which of the following is a solution to 4cos^2x-1=0?

60°

150°

210°

330°

Four student's grades changed after the last test. Which student's grade changed the least? Student A: from 92% to 95% Student B: from 87% to 81% Student C: from 98% to 94% Student D: from 82% to 87%

How long will it take Jordon to drive 600 miles if his average speed is 65 miles per hour? t = 600/65 per hour How many hours

Oliva has signed up for snowboarding lessons. Her parents set a limit of 400$ for costs for the season. It costs 250$ to get a mountain pass plus 9.5$ for each practice session. What is the maximum number of practice sessions that Olivia can go to?

A principal orders t-shirts and wants to check some of them to make sure they were printed properly. She randomly selects 2 of the 10 boxes of shirts and checks every shirt in those 2 boxes. What type of sample is this? A. Simple random sample B.

How do you simplify the mathematical expression: 4 (x-6) + 3x

What is 1.179 rounded to the nearest 2dp

Continue the pattern for 3 more numbers, 1, 3, 7, 13, 21,__, __, __. What is the pattern?

A sauce recipe uses 4 cans of tomatoes in every 21/2 quarts. how many cans of tomatoes are used in each quart of the sauce?

In geometry, the kissing number of a mathematical space is defined as the greatest number of non-overlapping unit spheres that can be arranged in that space such that they each touch a common unit sphere.

leg a of a right triangle is 12 inches long and the hypotenuse c is 13 inches long how long is the other leg b