−5x+2y=7; 15x−6y=−21
find how many solutions; none, 1, or infinite

According to the data set, where should the upper quartile line of the box plot be placed?

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

Asalsa recipe uses green pepper, onion, and tomato in the extended ratio 3: 5: 7. how many cups of tomato are needed to make 105 cups of salsa? a. 7 b. 21 c. 35 d. 49