Dylan is evaluating the expression 13+19+7+10. At one step in his work, Dylan rewrites the equation as 13+7+19+10. Which property of addition must Dylan have used when he evaluated the expression?

Paul's Plumbing charges a flat fee of $90 plus $40/h for a plumbing job. Perfect Pipes charges a flat fee of $60 plus $55 for a plumbing job. A. Write expressions to represent the total costs of a plumbing job for each company.

What is the answer to the problem 4 1/2 + 2 3/4

Use rounding numbers to estimate the sum of 171 + 727

Simon is making wreathes to sell. He has 60 bows, 36 silk roses, and 48carnations. He wants to put the same number of items on each wreath. All the items on a wreath?

The price of gas is $2.15 / gallon today. Last week it was $2.55 for a gallon of gas. What was the percent change in the price?

Which choice correctly compares two decimals? A) 2.17 = 2.017 B) 2.018 > 2.17 C) 2.16 2.017

Write a rotation vector that would rotate the plain green trapezoid onto the other plain green trapezoid (assuming the origin is where the two trapezoids meet). T = {a b c d} a=? b=? c=? d=?

An angle measuring 75° turns through a circle. Write the fraction for how much of the circle the angle turns through.

y = - 6x2 + 3x + 2 rewritten in vertex form

5,000+300+8 in standard form