substitute
if c + 9 = 12.5
Which value of c is correct?
c = 2, 2.5, 3.5, 4
c = 3.5
What is an equivalent expression for 2(3 + a)
6 + 2a
solve for x:
5 + x = 25
x = 20
In 5r + 25, what is the variable?
r
Amy has a certain number of pencils. After she lost 4 pencils, she has 8 left. How many pencils did Amy start with?
p - 4 = 8
p = 12
She started with 12 pencils
if 12 - d = 4.8
Which value of d is correct?
d = 7.2, 8.3, 9.4, 10.5
d = 7.2
What is an equivalent expression for 4(w - 3)
4w - 12
solve for t:
t - 3.5 = 8
t = 11.5
If 6 + 2 = 8
Is 6 + 2 + 4 = 8 + 4?
Yes
Mr Davis took his class on a trip to the zoo. Each entry ticket costs $6. If Mr Davis spent $108 in total, how many people went on the trip?
t = 18
if 5r = 75
Which value of r is correct?
r = 4, 8, 12, 15
r = 15
What is an equivalent expression for 1.5(4 + 6g)
6 + 8g
solve for z:
z x 4 = 28
z = 7
Is w = 5 a solution for w > 7 ?
No
If a sandwich costs $8.75, how many full sandwiches can Fred buy for $30?
s = 3 sandwiches
If 1.5a = 12
Which answer is correct for a?
a = 7, 8 , 9, 10
What is an equivalent expression for 25y + 15
5(5y + 3)
solve for q:
q / 0.9 = 9
q = 8.1
How many answers does an equation have?
One
To ride the roller coaster in an amusement park, customers have to be at least 4 feet tall. Plot this on a number line. (On the board)
[A filled in dot over the number 4 and a line extending to the right]
if p divided by 0.4 is 6
Which value of p is correct?
p = 1.5, 2.4, 3.3, 4.1
p = 2.4
What is an equivalent expression for 72 - 24b
8(9 - 3b)
solve for m:
3/4m = 4
m = 12/3 or 5 1/3
How can I check if my solution to an equation is correct?
Substitute the solution for the variable
[A hollow dot over 12 with a line extending to the left]