Equations for Real World

Write an equation for:

A water tank has 500 gallons of water and is being drained at a rate of 20 gallons per minute

• W= 500 - 10t

• W= 500 - 20t

• W= 20t

• W = 500 + 20t

Write an equation for:

A car rental company charges a fee of $40 and an additional $0.25 per mile driven

• T = 40 - 0.25m

• T = 40 + 0.50m

• T = 40 + m

• T = 40 + 0.25m

Write an equation for:

A store sells apples for $2 per pound, and there is an additional $5 delivery charge

• C= 5w + 2

• C= 2w - 5

• C = 5w - 2

• C= 2w + 5

Write an equation for:

A person earns $15 per hour and receives a $50 bonus at the end of each week

• E = 15h + 50

• E = 15h - 50

• E = 10h + 50

• E = 20h + 50

Write an equation for:

A rectangular pool is being filled at a constant rate of 30 gallons per minute.

The pool already contains 100 gallons of water.

• P = 100 + 30t

• P = 100 + 15t

• P = 100 - 30t

• P = 30t

Write an equation for:

A company produces notebooks, and the total cost of production includes a

fixed cost of $200 plus $5 per notebook.

• C = 200 + 5n

• C = 200 + n

• C = 5n

• C = 200 - 5n

Write an equation for:

A savings account has an initial balance of $1,000 and earns $50 in interest per year

• B = 1000 - 50t

• B = 1000 + 25t

• B = 1000 + 50t

• B = 500 + 50t

Which equation represents the total cost of a repair by an electrician after x hours?
An electrician charges $90 per hour plus a $50 travelling fee.

• y = 50 - 90x

• y = 90x + 50

• y = -50x + 90

• y = -90 - 50x

If 37 less than the product of 15 and a number is 38, which of the below items is true? Which equation would allow you to solve this problem?

• 37x - 15 = 38

• 15x - 75 = 38

• The equation is

  37 - 15x = 38

• The equation is

  15x - 37 = 38

For a field trip 7 students rode in cars and the rest filled four buses. How many students were in each bus if 203 students were on the trip? Write an equation to find the solution.

• 56

• 50

• 49

• 43