How do i solve y=x and y=-x+2 using substitution

I need a non negative number anyone?

A jar contains 3 oz of seed and is 1/6 full. How much seed is in a full jar?

Find the number, if 15% of it is equal to 9.

I dont know how to make 0.3 as a fraction and then simplify.

Dave bought jeans at a store. • The jeans had an original price of $45.50 • The jeans were discounted 30% from the original price. • An 8% sales tax was added to the discounted price. What amount did Dave pay for the jeans?

Which number is the approximate for 47 and - 23

Solve the inequality 7x ≥ - 7

The scale drawing of a window is 1 inch by 2 inches. The actual size of the window is 24 inches by 48 inches. What is the scale factor that is used to make the drawing?

Miranda and Savannah are excited that a new store just opened in town! They go together the first day it opens!

The solution to 4.2x = 19.32 is x = ___. 0.28 0.45 4.6 15.12