Operations (no calc)
-2 - 5
-7
-5 - 2(4)
-5 - 8
-13
Graph the inequality on a number line: x > 3
x is greater than 3 --> Filled in point on 3; shading to right
Find the area of a rectangle with length 2 cm and width 7 cm. (Area rectangle = LW)
Area = 2(7) = 14 cm2
Mabel bought one package of strawberries for $3. How many can Dion buy if he has $12?
1 pack/$3 = x packs/$12 --> x = 4 packages
-6 + 5
-1
5(3 - 6)
5(-3)
-15
Translate into an expression (no = sign):
A number less 6
n - 6 (different from "a number less THAN 6")
Find the area of a square with side length 5 yd. (Area square = side2)
Area = 5(5) or 52 = 25 yd2
Find the unit rate: 140 miles in 2 hours
70 miles per hour (or in 1 hour)
-2 - (-2)
0
(-2+3*2)/(2^2)
4/(4)=1
Translate into an equation (don't solve):
3 more than twice a number is 9.
Let n = a number;
3 + 2n = 9 or 2n + 3 = 9
Volume = 3(4)(5) = 60 m3
Proportional or not? (1, 4), (2, 8), (3, 12), (4, 16)
Yes, proportional; y = 4x
-8(-1)(10)
80
6/(-1- (-2))
6/(1)=6
Solve:
6 + x/(2) = 20
Subtract 6 on both sides; multiply by 2 on both sides; ...
x = 28
If the perimeter of a square is 48 inches, what is one side length? (Perimeter square = 4*side)
48 = 4x --> x = 12 inches
Proportional or not? (1, 4), (2, 6), (3, 8), (4, 10)
No, not proportional; y/x not always same
-48/4
-12
Simplify this algebraic expression:
10 - 17x + 13 - 6x
-17x - 6x + 10 + 13
-23x + 23
Solve and graph the solution:
4x - 7 < 5
Add 7 to both sides; divide by 4 on both sides; ...
x < 3;
x is less than 3-->Open point on 3; shading to left
If the volume of a rectangular prism is 36 ft, the length is 2 ft, and the height is 6 ft, find the width. (Volume rect. prism = LWH)
36 = 2(6)x ; 36 = 12x --> x = 3 ft
(1 1/(2))/3 = (x)/6
x = 3