Writing Equations
9 less than a number b equals 2.
B - 9 = 2
Tell whether the given value is a solution of the equation.
a + 6 = 17; a = 9
No, 9 + 6 = 15.
p x 3 = 18
P = 6
Tell whether the ordered pair is a solution of the equation.
y = 7x; (2, 21)
No, (2,21) is not a solution for y=7x.
Th e height of the 50-milliliter beaker is one-third the height ( 6 cm.) of the 2000-milliliter beaker. Write an equation you can use to find the height (in centimeters) of the 2000-milliliter beaker.
h = 6 x 3
A number k increased by 10 is the same as 24.
K + 10 = 24
k − 3 = 1
K = 4
65 = 5b
B = 13
Tell whether the ordered pair is a solution of the equation.
y = 5x + 1; (3, 16)
Yes, 15 = 15
Th e weight of an object on the Moon is about 16.5% of its weight on Earth. The weight of an astronaut on the Moon is 24.75 pounds. How much does the astronaut weigh on Earth?
150 lbs.
The product of a number q and 4 is 12
Q x 4 = 12
n − 10 = 4
N = 14
12q = 60
Q = 5
Tell whether the ordered pair is a solution of the equation.
y = 4x − 3; (4, 12)
No, (4,12) is not a solution for y = 4x - 3.
Write and graph an equation that represents the total cost (in dollars) of renting the bounce house. It is $25.00 per hour and $100 delivery fee. How much does it cost to rent the bounce house for 6 hours?
See Paper Key.
2 1/2 is the same as the sum of a number w and 1/2.
2 1/2 = w + 1/2
s + 8 = 17
S = 9
14 = 2y/5
Y = 35
Write & Graph the equation
y = x + 1
See Paper Key
Create and graph your own equation.
See Paper
Ten servers decorate 25 tables for a wedding. Each table is decorated as shown. Let c be the total number of yellow and purple candles. Which equation can you use to find c ?
A. c = 25 + (4 × 6) B. c = 25(4 + 6)
C. c = 10(25 + 4 + 6) D. c = 10(4 + 6)
B. c = 25(4 + 6)
13 + m = 20
M = 7
3z ÷ 2 = 9
Z = 6
Write & Graph the equation
y = 2x
See Paper Key
Create & Graph your own equation
See Paper