Solve this system of equation:

5x + 2y = - 15

2x - 2y = -6

Why is scientific notation useful and how is scientific notation used in the real world?

Cara has $25 to buy dry pet food and treats for the animal shelter. A pound of dog food cost $2 and treats are $1 apiece. If she buys 9 pounds of food, what is the greatest number of treats she can buy?

What is the quotient and remainder for 6 divided by 27

Tom sells cellphones for $45 a phone. Sam sells tablets for $149 a tablet but he is not making any profit yet because he still needs to pay off his order of $4992. when will the two guys make the same money? How much money will they both have?

An item has a listed price for $80 if sales tax rate is 3% how much is sales tax in dollars

Natalie is opening a clothing store. She plans to start by selling gym shorts. It costs her $7 for each pair of shorts, $3 per box for the shorts, and $0.25 a bag.

What is the equation of a line that passes through (0, 5) and (-10, 0)

What is 7 square root 4 to the power of 3?

What is the degree of this polynomial? - 11x^3+10x

Macie just bought a new fish tank. The fish tank is a cube with a side length of 1.75 feet. She is going to fill the fish tank using a small plastic container she found in her kitchen cupboard by filling it at the sink, walking it to the tank,