80% is what fraction

At the movie theatre, child admission is $5.20 and adult admission is $9.70. On Sunday three time as many adult tickets as child tickets were sold, for a total sales of $788.90. How many child tickets were sold that day?

If f (x) = - x2 + 4x - 9 and g (x) = x - 8, find g (f (-1))

What constant do you need to add to each of the following quadratic equations to complete the square?

Family is making a five-day 2100 mile trip the first 4 days they travel 1755 miles use a problem solving plan to find what speed they must travel to complete their trip in 6 hours on the final day

If c (x) = 3x-1 and k (x) = x^2-2x+1, what is the value of (c°k) (5)

How to identify the vertex of a quadratic function

3/8 of the students in Ms. Mull's class ride the bus. If there are 24 students in the class, how many students ride the bus?

An object that weighs 1 pound on earth weighs 1.19 pounds on Neptune. Suppose her dog weighs 9 pounds on earth. How much would the same dog weigh on Neptune.

Which statement is true about the following equation 3.5z=2.25z-4.25+6.25 A. it has no solution. B. it has one solution. C. it has two solutions. D. it has infinitely many solutions.

If the surface area of a certain body of water is 400ft2 and the surface area to volume ratio is 1:11 what is the volume of the body of water?