Which term best describes lines that intersect at a 90 degree angle?

What's the sum of (9a+3b-5) and (4b-6)

Which of the following ratios forms a proportion? Select Yes or No. A. 28/49 ≟ 4/7 Yes No B. 4/7 ≟ 16/28 Yes No C. 4/7 ≟ 16/35 Yes No D. 4/7 ≟ 20/25 Yes No

Ishaan is 7 years old and william is 4 years old. how many years will it take until ishaan is only 5 times as old as william?

At the annual dog show, Chantel noticed that there were three more Scotties than Schnauzers. She also realized that the number of Wirehaired Terriers was five less than twice the number of Schnauzers.

You buy a new computer for $2,100. the computer decreases by 50% annually. when will the computer have a value less than $100?

0.27 (repeating) into a fraction. Simplify if needed.

Billie and Toni are driving from Chicago to Phoenix. The first day they drove 420 miles. They want to drive at 65 miles per hour for the rest of their trip. a. Write an algebraic expression to represent the situation. b.

Factor k squared - k-56

2 - 4x = 14 A) - 4 B) - 3 C) 0 D) 3

An anthropology graduate student measures the floor of a round hut and calculates that it has an area of 12.56 square meters. What is the floors diameter?