In a certain class, the ratio of girls to boys was 5 to 4. If there are 80 boys in the class, how many students are there in all?

Find the product. (2x - 5) (3x^2 - 4x + 1)

A water bottle holds Fraction 5 over 8 liter of water when it is Fraction 3 over 4 full. Which statement best describes the quotient of 5 over 8division sign3 over 4? The maximum amount of water the bottle can hold is Fraction 6 over 5 liters.

What does Descartes's Rule of Signs tell you about the real roots of the polynomial? - 2x3 + 3x2 - 5x - 2 = 0 a. There is one positive root and either two or zero negative roots. b.

Makoto's lacrosse practice last 1 3/4 hours. This week he attended all of the practice on Monday and Wednesday, but he had to leave halfway through practice on Friday. How many hours did Makoto's spend at lacrosse practice this week?

Find the area under the curve y = 5/x3 from x = 1 to x = t. evaluate the area under the curve for t = 10, t = 100, and t = 1000. t = 10 t = 100 t = 1000 find the total area under this curve for x ≥ 1.

75 is 20 percent of what

Dawn is trying to find the dimensions of a parallelogram. She knows that the base is one unit less than twice the height of the shape. The area is 91 square units. How long are the base and height?

When sandra walk through the house she saw that 18 lights are on and only one third of the lights were off how many lights were off?

What is the difference? 45-13

Evaluate. 7C6 A. 9 B. 1 C. 5,040 D. 7 can someone explain this to me?