Unit 1/2
A scale drawing of a school gym uses a scale of 1 cm : 5 m. If the drawing shows the gym as 6 cm long, what is the actual length of the gym?
30m
A circle has a radius of 8cm. What is the circumference?
50.24cm
If something is discounted 30%, what does that mean?
The items is on sale, cheaper than before
NO CALCULATOR: -5 + 8 =
3
solve: 2x + 5 =17
x = 6
A triangle has a side length of 84 mm. The second triangle is minimized and has a side length of 7 mm. How many times smaller is the second triangle?
12 times smaller
Find the area of a circle with a radius of 10.
314
A video game costs $40. It is on sale for 25% off. What is the sale price?
$30
Two negative make a ___
positive
Explain what this means: x > 4
x is greater than 4
2 : 90
3 : 135
5 : 225
What is the constant of proportionality?
45
A pizza has a diameter of 12 inches. What is the area?
113.04
A restaurant bill is $870. You want to leave a 60% tip. How much money will you give as a tip?
$522
NO CALCULATOR: -4 x 6 =
-24
4(2x+3) =
8x + 12
At a store, 6 apples cost $4.50. How much do 10 apples cost?
$7.50 0.75 per apple
Explain the difference between circumference and area.
circumference = goes around an object
area = space within an object
A family spent $190 on amusement park tickets. They had to pay a sales tax of 23.5%. How much money did they pay for the tickets?
$234.65
A diver was at -400 meters. They rose 50 meters, and then went back down 175 meters. How deep is the person?
-525 meters
3(x+4) = 27
x = 5
When looking at a graph, what two things must appear for it to display a proportional relationship?
goes through (0,0), is a straight line
Which is bigger? The circumference of a cake with a radius of 12 or the area of a cookie with radius of 10?
Cookie!
A jacket was $60 but is now selling for $45. What % discount did it have?
25%
Solve for x: x + 5 = -2
x = -7
2x + 3 > 11
X > ?
x > 4