When Devon cashed a $450 check at the bank, the teller gave him 18 bills, all $20 bills and $50 bills. Which system of equations can be used to find how many of each type of bill Devon received?

Draw to show 55 three different ways

How do you solve rhis problem. It's 7th grade math. 9+15=5*13

What is 7.5 out of 20

Estimate the difference. 9 1/2 - 1 6/7

Simplify the expression. StartFraction negative 44.288 minus 31.6 over negative 3.1 (6 minus 1.2) EndFraction

Write the expression as a single natural logarithm. 3 ln 3 + 4 ln b ln 96b4 ln (27 + b4) ln 36b ln 27b4

Ralph sold brownies for $ 0.63 0.63 a piece in order to earn money to buy baseball cards. If the cards cost $ 1.35 1.35 per pack, and if Ralph had no money left over after buying them, what is the least number of brownies he must have sold?

The segments shown below could form a triangle 9,4,15 true or false

What is 65.536 rounded to the nearest whole number

What is the fraction twelve twenties in its simplest form?