Subtracting the second equation from the first

-2x + 7y = 10

3x + 7y = 2

Reasoning: if you know that 9 x 20 = 180, how can you use this to find 9 x 24? explain your strategy.

What is 5+x^2=2x^2+13?

Lorenzo spent $47 at the shoe store. He bought 3 pair of socks that cost $6 per pair. He also bought a pair of shoe. He paid $4 in sale tax. How much did Lorenzo's shoes cost?

Emily wants to watch her intake of fat per day. She estimates that the dinner will have 48 grams of fat. What percentage of her total daily allowance of fat will the dinner be?

Factor completely. 6x^2+3x-63

Gail is thinking of a number n, and she wants her sister to guess the number. Her first clue is that nine less than two times her number is between negative seven and one.

Brent was looking at his cell phone bill and saw that the total number of texts he has sent is tracked. Month Texts 1 120 2 237 3 354 4 471 The function representing Brent's texting per month is f (m) = 117m + 3. What does the 117 represent? A.

Elsa buys 27 quarts of punch for a party. Each serving is 8 fluid once's. If the guests drink 100 servings of punch, how many fluid ounces of punch are left over?

Talishas bedroom is a rectangular prism. The area of the floor is 156 square feet, and the height of the bedroom is 9 feet. What is the volume of Talishas bedroom?

How to find interest using numbers other than 100 and having your answer be a percentage.