Scale Drawings and Proportional Relationships
If 3 pencils cost $1.50, what is the cost of 1 pencil?
$.50 per pencil
What is the formula for the area of a circle?
A=pir^2
What is 25% of 80?
20
Simplify the expression: 2x+3x
5x
What is the probability of rolling a 3 on a standard 6 sided die?
1/6
A car travels 60 miles in 1.5 hours. What is the unit rate in miles per hour?
40 miles per hour
Find the area of a circle with radius 3 cm. Use π≈3.14.
28.26 squared cm or
9pi
A $60 jacket is on sale for 20% off. What is the sale price?
$48
Write an inequality: "x is greater than 6"
x>6
A bag has 4 red and 6 blue marbles. What is the probability of drawing a red?
4/10, 2/5, or 40%
A scale drawing of a garden has a scale of 1 in = 4 ft. If the drawing of the garden is 6 inches long and 3 inches wide, what is the actual area of the garden in square feet?
288 ft.
6x4=24
3x4=12
24x12=288
A circle has a diameter of 10 inches. What is its area?
78.5 square inches
A student scored 18 out of 20 on a quiz. What percent did they get?
90%
How do we know if a graphed inequality will have a closed or open circle? What does a closed circle mean?
If the inequality sign has "or equal to". It means that number is a part of the solution set.
A spinner has 8 equal sections: 3 are green, 2 are red, and 3 are yellow. What is the probability of not landing on red?
6/8, 3/4, or 75%
A graph shows a straight line through the origin with a slope of 2. What equation represents this proportional relationship?
y=2x
A circular rug has an area of 113.04 ft². What is the radius? Use
pi=3.14.
6 ft.
A phone originally costs $250. It is discounted by 30% and then taxed at 8%. What is the final price?
$189
Solve: -3x+2≤11
x is greater than or equal to -3
Match the probability with its numerical value:
33% Certain
0% More Likely
100% Less Likely
70% Impossible
33% Less Likely
0% Impossible
1000% Certain
70% More Likely
A rectangular park is shown on a map with a scale of 1 cm = 3 meters. The drawing shows the park as 6 cm by 4 cm. What is the perimeter and area of the real park?
60 in
Perimeter=2(18+12)
A semicircle has a radius of 8 cm. What is its area?
100.48
Semicircle is a HALF circle
The population of a town increased from 1,200 to 1,500. What is the percent increase?
25% increase
Write and solve an inequality: "The total cost of x items at $4 each is less than $30"
4x<30
x<7.5
A jar has 5 red, 3 blue, and 2 green marbles. One is drawn, replaced, and drawn again. What is the probability of drawing a red both times?
1/4 or 25%