Ratios and Proportional Relationships
Richie Rich spent $25 on 4 pieces of candy. Find the unit rate.
$6.25 per piece
Add.
12 + (-8)
4
Convert into an equation. Use "x" as your variable
6 times a number plus 3 equals 27
6x + 3 = 27
Divide (convert to a decimal)
3/8
0.375
What are complementary angles?
two angles that equal 90 degrees.
Find the equivalent rate.
3 X
___ = ___
8 12
X= 4.5
Multiply.
(-6) x (-7)
42
Solve for x. Show your work!
6x + 3 = 27
x=4
How many degrees are in a pentagon?
540 degrees
A regular octagon has 1080 degrees. How many degrees is each angle?
Each angle is 135 degrees
A proportional graph must include what two things? Draw an example.
Must have example.
*Goes through the origin
*Forms a straight line
Divide
-72/ 12
-6
Solve for x. Show your work!
4x - 10 = 26
x=9
40% of the 7th grade voted to watch Shrek. If there are 120 7th grade students, how many voted to watch Shrek?
48 students
A quadrilateral has angles 25, 137, 155 and x. What is the value of x?
x= 43 degrees because the interior angles add up to 360 degrees
Richie Rich spent $23.95 on 5 bags of Takis. Find the unit rate.
$4.79 per bag
Subtract
13.5 - (-7.9)
21.4
Solve for x. GRAPH your solution.
x-10 > 5
X>15
Must include graph.
Open circle at 15, shaded to the right
45 out of 80 8th graders wanted to go to the park before the school year ended. What percent is that?
56.25%
What are vertical angles?
Show a picture to justify your answer.
Vertical angles are created by intersecting angles and the vertical angels are across from each other.
Draw an example of a proportional table. Include 5 x-values and 5 y-values.
Give your table a title!
Hint: y=kx
Example must include a constant!
Subtract. Leave in simplest form!
-5/8 - (-7/8)
Solve for x. Graph your solution
6x-3< 27
x<5
Must include graph-
open circle at 5 shaded to the left
60% of the 8th grade students voted to go to Six Flags as their class trip. If 84 8th graders voted to go to Six Flags, how many total 8th grades are there?
140
A triangle has angles with a ratio of 2:1:2. What is the value of each angle?
72, 36, 72