Tony wants to model the Associative property of addition using a number sentence. Which number sentence could be used for Tonys model?

A. 6 + (4+5) = 6 + (5+4)

B. 8+7=8+7+0

C. 7 + (3+6) = (7+3) + 6

D. 8+7=9+6

629,999 round to the nearest hundred thousand

Which expression is equivalent to b^-2/ab^-3?

Joaquin and Serena are asked to graph the inequality x > - 7. Joaquin thinks the graph should have an open dot at - 7. Serena thinks the graph should have a closed dot at - 7. Explain who is correct and why.

Find the product and write it in simplest form 4*1/8*3/10

Joanna made a quilt using 72 squares. Of these squares 1/4 were green, 2/9 were blue, 4/9 were yellow, and 1/12 was white. She used the least number of squares of which color? A. Blue B. Green C. White D. Yellow

Two Plus the sum of three and a number

Math question! Show your work. Over the past 4.85 days, Mrs. Smith found that the temperature outside had dropped a total of 22.2 degrees. Find the average change in temperature each day.

I am trying to get 2/7 into a whole number or a mixed number

Allie is building a patio. the patio will have 8 tiles in each of 13 rows. she has already built the center section with 4 tiles in each of 7 rows. How many more tiles are needed to complete the patio? Show your work?

Multiply monomials by polynomials - p 2 (p 2 - p-1)