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

The value √10 and √15 are plotted on the number line

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)