How to solve equations with 2 variables with substitution and elimination?

If a pair of perpendicular lines are rotated, which is true? A) Rotating perpendicular lines result in parallel lines. Eliminate B) The lines remain perpendicular only if rotated 180°. C) The lines remain perpendicular only if rotated 360°.

What is 80000*80000+9000025

What is 12 1/2 as an improper fraction?

Divide use estimation or multiplication to check 6:89 r

Oscar and Stella go birdwatching. Oscar sees 7 birds. Stella sees 28 birds. How many times as many birds as Oscar does Stella See? Which bar model represents the problem?

the current population of a city is about 2,130,000 people, and its increasing at a rate of 10 percent per year. arrange the steps in the correct order to show how to determine the population of the city in 5 years

What is the equation of the following line (1,9) (0,0)

2 5/16 divided into 7/8 equals what

The perimeter of a rectangular garden is 52 feet the length of the garden is 4 less than twice the width what is the widththe

A shopper wants to ensure she has enough cash to purchase a $25 cell phone, so she asks a clerk what the total will be with the sales tax included. The clerk tells her the total will be 27.25. What is the sales tax percentage?