This summer Vanna wants to charge 2.5 times as much for mowing and raking, but her expenses ($10 per weekend) will also increase 2.5 times. The expression below can be used to find how much Vanna will make mowing and raking x lawns in a weekend.

2.5(20.50x + 5.50x -10)

Write a simplified equivalent expression without parentheses. Show each step please!​

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

A, at (-2, 4), is 6 .of a'? (-8, 4) (-8, -2) (-2, -2) (-2, 4) b, at (-4, -7), isy-.of b'? (-4, 7) (4, -7) (4, 7) (-4, -7)

Robert is placing sod in two square shaped areas of his backyard. one side of the first area is 7.5 feet. one side of the other area is 5.7 feet. the sod costs y dollars per square foot