Richard bought 3 1/4 ft of plumbing pipe. the pipe cost $1.60 a foot. how much did richard pay for plumbing pipe?
a student solved the problem this way.
3 1/4 feet = 3.25 feet
let n represent the amount richard paid for plumbing pipe.
n = 3.25 × $1.60
n = $5.20
richard paid $5.20 for plumbing pipe.
use a similar strategy to solve this problem.
connie bought 2 1/8 yd of black felt and 3 3/8 yd of red felt. felt cost $1.50 a yard.
how much did connie spend on felt?
a.
$8.25
b.
$8.35
c.
$9.95
d.
$10.25

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.