Writing Equations

An electrician charges $90 per hour plus a $50 travelling fee. It costs $1000 in total.

• 1000 = 50x + 90

• 1000 = 90x + 50

• 90 = 1000 + 50x

• 90x = 1000 + 50

• 50 = 90x + 1000

Harris Publications is having some books printed. The printer charges $800 plus $5 per book. What equation could help me find how many books can be printed for $4,000?

• 800 + 5x = 4000

• 800x + 5 = 4000

• 4000 + 5x= 800

• 800 + 5 = 4000

• 4000 = 800 + 5

Jose and Maria bought several packages of Slaps candy. Maria has ten less than three times the number of Slaps Jose has. If b represents the number of Slaps Jose has, which equation represents the number of Slaps Maria has?

• 3(b - 10)

• 10 - 3b

• 3b - 10

• 10(3) - b

A plumber charges customers $37 for each hour worked, plus an additional $20 for travel. If w represents the number of hours worked, which expression will calculate the plumber's total charge?

• 37 + 20 + w

• 37w - 20

• 37 + 20w

• 37w + 20

A car costs $45.00 to rent each day, and an additional $0.25 per mile driven. Which expression represents the cost for renting the car 5 days and driving m number of miles?

• 45 + 0.25m

• 45m + 0.25(5)

• 45(5)m + 0.25

• 45(5) + 0.25m

Speedy Boat Rental charges a $15 deposit fee plus $2 for each hour of use to rent a paddle boat.  Write an equation to find out how many hours, h, they rented the Boat if the total cost was $33.

• h = 2(9) + 15

• 33 = 15h + 2

• h = 15(9) + 2

• 33 = 2h + 15

Write the sentences as an equation:

(Use +, -, *, / to show operations)

299 minus p equals 18

Write the sentences as an equation:

(Use +, -, *, / to show operations)

198 and k more is 4

Write the sentences as an equation:

(Use +, -, *, / to show operations)

11 is 380 reduced by w

Write the sentences as an equation:

(Use +, -, *, / to show operations)

62 added to r is 138