How can you tell if a lines is perpendicular based on their slope?

Which of the following expressions represents a function? a. x2 y2 = 9 b. { (4, 2), (4, - 2), (9, 3), (9, - 3) } c. x = 4 d. 2x y = 5

A number less than 85 the number has 26 and 6 as factors

7.6375 correct to 2 decimal place

During a sale, customers receive an extra discount if they spend $200 or more. So far, Erin's purchases total $135. Which inequality can be solved to show how many more dollars d she must spend to receive the extra discount?

The following week, Gwen walked a total of 15 7/8 miles. How many more miles did she walk the second week than the first week?

Ian finds 9$ for each hour he works and 10$ for each day he works. To find out how much he makes in a day, he made the equation y=9x+10x, where x is the number of hours he works.

N 2008, the Queen Sesheshet Pyramid was discovered in Egypt. Archeologists determined that the original height of this right square pyramid was about 14 m and the original base side length was about 22 m.

Solve this system - 10x, 5x by elimination

What is the value of 54 - 4a^2 3b^3 when a = - 2 and b = 4? 4. solve the equation for b:

Find fl-2) for the function f (x) = 312 - 2x + 7