Which pair of equations represents two perpendicular lines?

A. y=-7/8x+3 and - 7y=-8x

B. 8y=3x+40 and y=8/2x-1

C. 5y=15-2x and 2/5x-4=y

D. y=9x+3 and y=9x-1/3

I am a 3digit number that is less than 500. My ones digit is twice the hundreds digit. The sum of the three digits is 14. What number am I?

What is 6 percent of 12

Over the last three evenings, Rita received a total of 91 phone calls at the call center. The third evening, she received 2 times as many calls as the first evening. The second evening, she received 5 fewer calls than the first evening.

What is the range of y = sin θ?

A circle has a diameter of 14 meters. what is the circumference?

What is the unit rate of 600 calories / 1.5 h

Given a graph of a system that has exactly one solution, how would you estimate the solution to the tenths place?

What's 360 : 120 as a decimal

On monday morning elijah opened a box of cereal and ate 1/8 of it and on tuesday he ate 1/6 how mutch is left

Cindy spends 20% of the money that she has on groceries. she has a total of 30$ how much money did she spend on groceries