Tara buys two items that cost d dollars each. She gives the cashier $20. Which expression represents the change she should receive? A. 20 - 2d
B. 20 - d
C. 20 + 2d
D. 2d - 20

Leo has b boxes of pencils. each box contains 6 pencils. he has a total of 42 pencils. the equation that represents this situation the value of b that makes the equation true the first one is b+6=42,6b=42,b=42+6,or 42b=6 the second one are 7,836 48

What is the first step of an indirect proof of a number that is divisible by two

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1