Solve the following systems using matrices. Show your work and explain along the way. 1.
4x - 2y = -1
x + 5y = 1

2.
2x + 3y = 5
x + 4y = 10

Explore the matrix function on your graphing calculator.
Use your calculator to solve the following systems. Explain how you used your calculator on each
problem.

3.
4x - 2y = -1
x + 5y = 1

4.
x + 2y + 3z = -1
2x - 3y + 4z = 2
-3x + 5y - 6z = 4

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

What is the solution set of the quadratic inequality x^2-5< or equal to 0

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212