2. janice is buying paint to paint her new apartment. the store sells paint in one-gallon cans. how accurate does her estimate need to be for the amount of paint needed?
3. a city planner is measuring the distance of one city block. which unit of measure should she use: 1 mile, 1 meter, inch?

2.Janice should know the area of her apartment that  requires painting. This should be followed by calculating the area  that 1 gallon of the paint can completely  paint.Dividing the total area of the apartment to be painted with the area painted by a single gallon can will determined the number of gallon cans to buy for the apartment painting.

3. The approximate distance covered by 20 blocks is 1 mile.This is an example of Manhattan.A city planner can use this estimate to know the distance of a single city block by dividing 1 mile with 20 blocks.She can use 1 mile.

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116