Simplifying Expressions
-3(2a +5) - 4a
-10a - 15
2x + 15 = 75
x = 30
Two angles whose measures sum to 90 degrees.
A quadrilateral that has 4 sides of equal length and 2 pairs of parallel sides.
Rhombus
y divided by x
6 - 4(3 - 2h)
-6 + 8h
9 - 2x = 3
x = 3
The sum of all angles on a line.
180 degrees
A quadrilateral with 2 pairs of parallel sides and 4 right angles.
Rectangle
What is the constant of proportionality also called?
Unit rate
1/3(3m + 6) - 2(2m +6)
-3m - 10
5(2/3 - 4x) = 6
x = - 2/15
Supplementary angles
A quadrilateral with 4 sides of equal length and 4 right angles.
Square
Multiplication
Use the GCF to factor the expression:
9x + 81
9(x + 9)
2(8w + w) = 80
w = 4 4/9
Pairs of opposite angles made by two intersecting lines.
Vertical angles
A quadrilateral with one pair of parallel sides.
Trapezoid
Solve:
7(4 - 9) + 37
2
Use the GCF to factor the expression:
15x - 20y + 50
5(3x - 4y + 10)
50 - 14x = 8
x = 3
An angle that measures less than 90 degrees.
Acute angle
A polygon with 4 sides.
Quadrilateral
So-hee drove back and forth to school every day this week. She filled her tank and recorded the number of miles in mother's gas log. Her tank had 312 miles. If she drives 7 miles each way to school, how much gas did she use and how many miles does she have left in her tank if she did not drive anywhere else.
She used 70 miles.
She still has 242 miles left in the tank.