From Words to Equations

John swims 34 miles every week. Which equation best represents the total number of miles, m, John, swam after w, weeks?

• m = 34w

• w = 34m

• m = 34 + w

• w = 34 + m

Write an equation for
 17 less than H equals 42

• 17-H=42

• H-17=42

• H+17=42

• 17+H=42

two times x, increased by five

• 2x - 5 

• 2x + 5 

• 2(x - 5) 

• 2(x + 5) 

A fish tank has a volume of 520 in³.  It is emptied at   a constant rate of 10 cubic inches every minute.  Which     equation represents the volume v, after t, time in   minutes?

• v = 520 +10t

• v = -520 - 10t

• v = 520 – 10t

• v = -520 + 10t

Melissa wants the city to provide every Farrington classroom with recycling bins and is in the process of collecting student signatures for her petition. So far Melissa has collected 82 signatures and wants to collect 15 signatures for each classroom she visits during advisory time. If S is the total number of signatures Melissa has collected, and C is the number of classroom visited, write an equation.

• C = 82 + 15S

• S = 82 + 15C

• C = 82S + 15

• S = 82C + 15

Jacob collects hats.  He has 6 hats already, and he collects 2 hats a week.    w = number of weeks, h = total hats

• h = 2w + 6

• h = 6w + 2

• h = 2w - 6

• h = 6w - 2

Talk time Phone Company charges $0.12 per minute of phone use plus a monthly service fee of $8.00 for its phone service.  Which equation below can be used to find c, the total cost for one month when m, minutes are used?

• c = 0.12m + 8m

• c = 8m + 0.12m

• c = 0.12m + 8

• c = 0.20m