Geoffrey thinks that the sum of 5x2y3+6x+7y and 8y+4x3y2+2xis 9x2y3+8x+15y. Explain Geoffrey's error, and find the correct sum.

Which of these num. are prime: 1, 11, 21, 51?

Martha had 154 stamps and her sister had 248 stamps. They combined their collections and put the stamps in an album. If they want to put 8 stamps on each page, about how many pages would they need?

What is 5/6 over 1 1/4

What Is 102+272+567+6627

Find the value of x or y so that the slope equals - 33 (2,-10) and (-1, y)

Slope is - 2, and (4,3) is on the line

A particular personal trainer works primarily with track and field athletes. She believes that her clients run faster after going through her program for six weeks. How might she test that claim? Multiple Choice A hypothesis test for p1 - p2.

What is the slope of the line? 5 (y+2) = 4 (x-3)

Factor the expression. 9b^2-25

Given the equation p2 = a3, what is the orbital period, in days, for the planet venus? (venus is located 0.72 au from the sun?)