How to do equations

math

How is 7.7 x 1.4 = 10.78

A mall kiosk needed to buy 33 new cell phone cases at z dollars a piece. Because they were buying so many they got 5% off the price. Which expression shows how much money they saved? A. 33z - 0.05 B. 0.05 x 33z C. 33z + 0.05 D. 33z + 1.05

The first two steps in determining the solution set of the system of equations, y = - x2 + 4x + 12 and y=-3x + 24, algebraically are shown in the table.

Multiply. Express the product in simplest form. 2 / 10 x 20 = n A. 40 B. 20 C. 4 D 1/100

If eight times a number is subtracted from eleventimes the number, the result is - 9. find the number.

If I ate 1/8 of a pizza and mark at 1/3 how much is left

What is 0.8 divided by 0.168

Interval 20-29 what's the frequency

Each student in a course needs to submit 3 lab assignments and take 2 tests. Design a program to do the following. Ask the user to enter 3 lab scores and 2 test scores. Calculate and display the lab average and the test average.

What is 712 ➗ 8 show your work