An angle bisector AC divides a trapezoid ABCD into two similar triangles △ABC and △ACD. Find the perimeter of this trapezoid if the leg AB=9 cm and the leg CD=12 cm.

Francesca has 63 cm of ribbon. She will cut it into two pieces so that the longer piece is 15 cm longer than the shorter piece. What will the length of the longer piece be? Enter your answer in the box. |_|cm

How do you do 8*51 in property

Zachary can spend no more than $82 per day to rent a car. a car rents for $40 per day plus $0.21 per mile. what is the maximum number of miles that he can drive the car?

Why does the equation 3x+7=-3x+2+6x have no solution?

What is 45,123 rounded to the nearest thousand

How do I simplify 9/243

How far does Gerry live from school

Percent sales tax: 7% price before tax: $250 price with tax:

Can you show the work to 156 divide by 11

Which expression is equivalent to a + (c + 7) ? 7 a c a minus (c + 7) (c + 7) minus a (a + c) + 7