Mary has 18 marbles. if tim has 5 times as many marbles as mary, which number sentence shows how many marbles tim has?
a.
5 × 18 = 90

b.
18 + 5 = 23

c.
18 × 18 = 324

d.
5 × 5 = 25

2a+7+4ahow many terms? how many variables? any like terms? yes noif yes, which ones? what are the coefficients? any constants? yes noif yes, which ones? simplify the expression by combining like terms and constants: how many terms now?

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

Which segments are congruent? o jn and ln o jn and nm o in and nk onk and nm