What is the value of z if x=4 and y=9

How many ways can you make change for a quarter? (Different arrangements of the same coins are not counted separately.)

Kamila has two number cubes each labeled 1 to 6. She is going to conduct an experiment by tossing both cubes a total of 150 times. She will find the sum numbers in each roll. How many possible outcomes are there?

Add or subtract each expression. Simplify your final answer show all work. 1. Add 4x+2 and 6x-3 2. Subtract 3a-6 from 8a-10

You can fill a 12-gallon tank gas for $28.69 or buy gas for $2.20

Write the equation in standard form using integers. y=-4/5x-7 A. 4x + 5y = 35 B. -4x + 5y = 35 C. 4x - 5y = 35 D. -4x - 5y = 35

A car is 200 km from its destination after 1 hour and 80 km from its destination after 3 hours.

Consider the equation x-3=5. a. Multiply both sides of the equation by a constant, and show that the solution set did not change. Now, multiply both sides by x. b. Show that x=8 is still a solution to the new equation.

A gardener uses a tray of 6 conical pots to plant seeds. each conical pot has a radius of 3 centimeters and a depth of 8 centimeters. about how many cubic centimeters of soil are needed to plant the full tray? round to the nearest cubic centimeter.

The price of 2 bananas are $1.00. How much would 7 bananas cost?

students' scores on an anthropology test have a mean of 31 with a standard deviation of 3.5 if rochelle scores 20 on her test, how many standard deviations away from the mean is her score