Formulas
Solving Equations
Writing Equations
Final Jeopardy
100
The formula for area of a rectangle is: A = lw . Find the area of a rectangle with length(l) of 9 and width(w) of 3.
27
100

Solve algebraically.

5x = 25

x = 5 (show that you divided each side by 5)

100

Write and solve an equation that shows "the sum of four and a number is twelve."

Let n = a number  4 + n = 12; n = 8

100

1/2c = 3/4

c = 1 1/2

200
The formula for calculating the sum of the angles in a polygon with n sides is sum = 180n - 360 degrees. Find the sum of the angles in an pentagon (polygon with 5 sides).
540
200

Solve algebraically.

 g/5 = 18 ?

g = 90 (show that you multiplied each side by 5)

200

Write and solve an equation that shows "the product of six and a number is eighteen."

Let n = a number  6n = 18;  n = 3

300
The formula to find the area of a triangle is 1/2 bh. Find the area of a triangle with a height of 8 and a base of 6.
24
300

Solve algebraically.

z + 1.6 = 10.25

z = 8.65 (show that you subtracted 1.6 from each side)

300

Write and solve an equation that shows "the quotient of a number and three is seven.

Let n = a number  n/3 = 7; n = 21

400
The formula for calculating the surface area of a cube is SA = 6s2 . What is the surface area of a cube with sides of 4.9?
144.06
400

Solve algebraically.

k - 4.2 = 8.14

k = 12.34 (show that you added 4.2 to each side)

400

David is saving for a new video game console that costs $75.  He can save $15 each week.  Write and solve an equation to show how many weeks he will need to save before he can buy the video game console.  Note: You may not start with the variable alone on one side of the equation.

Let w = the weeks he will need to save  15w = 75; w = 5  He will need to save for five weeks.

500
The formula to convert Celsius to Farenheit is: F = 9/5 C + 32 Find the Farenheit equivalent of 25 degrees Celsius.
77 degrees Fahrenheit
500

Solve algebraically.

x/ 3.9 = 5.2

x = 20.28 (show that you multiplied each side by 3.9)

500

Write and solve an equation for this following situation.  A parking meter had 18 quarters in it by noon. By the end of the day, it had 41 quarters in it. How many quarters were put into the parking meter in the afternoon? Let q = the number of quarters added in the afternoon. (You may not start with the variable alone on one side.)

18 + q = 41 or q + 18 = 41; q =23

M
e
n
u