There are 13 students in a biology class and 12 students in a chemistry class. if there are 20 students in total, how many students are in both classes?

Gary lost 17 pounds while on a diet, but gained 8 pounds back. Which number is the additive inverse of the change in Gary's weight? A) - 8 B) 17 C) 8 D) 9

Find the mean of the squares of their first 10 counting numbers

How many tenths are in one whole? How many hundredths?

A square fits exactly inside a circle with all of its vertices being on the circumference of the circle. The square has sides of lengths x cm The area of the circle is 56cm^2 Give your answer to 3sf.

The sum of 3/4 and 18/19

What's equivalent to x=3y-2

Elisa puts $1,000 into each of 2 bank accounts. Account A: 3% interest rate, compounded annually, which is growth Account B: $40 bonus added to the account each year, which is growth How much money will be in Account A at the end of 3 years?

Let f (x) = 3x + 2 and g (x) = 7x + 6. Find f • g and its domain.

Rayhanna was traveling to the airport to visit her family out of town. she left her house to go the airport at 440pm. if it took her 40 min to travel to the airport, what time did she arrives make her flights. I said. she arrived at 520.

Read the word problem below. Jill had $90. She bought a skirt that normally costs $42 but was on sale for half price. She also bought a T-shirt that was $8 off its regular price. Before sales tax, the total cost of the clothes was $31.