Scale Factor
Rectangle A has dimensions 3in x 5in. Rectangle B has dimensions of 6in x 10in. Is Rectangle B a scaled copy of Rectangle A?
Yes.
The paint color requires 3 cups of blue paint for every 2 cups of red paint. What is the COP in this situation?
(3/2) or (2/3)
If the diameter of a circle is 10 units, what is the radius of the circle?
5 units
Write 45% as a fraction in simplest form and a decimal.
45/100 = 9/20
45% = 0.45
15 - 20 =
-5
Rectangle A has dimensions 3 in x 5 in. Rectangle B has dimensions of 13 in. x 15 in. Is Rectangle B a scaled copy of Rectangle A?
No.
What is the COP in this proportional relationship? The recipe calls for (3/4) cups of sugar for every 2 cups of flour.
3/8 or 8/3
True or False? The circumference of a circle is proportional to the diameter of the circle.
True
What is 25% of 80?
20
-25 - (-3)
-22
Rectangle A has a width of 4.5 in and a length of 7 in. What are the dimensions of a scaled copy using a scale factor of 3?
13.5 in width and 21 in length
Abby walked to school at a constant speed of 1 mile in 15 minutes. Write an equation that represents the amount of time in minutes, t, that it takes her to walk a distance of d miles.
t = 15d or d = (1/15)t
C = 2r(pi) = 2*5*pi = 10(pi) meters
A cell phone costs $500. It is on sale for 20% off. What is the sale price of the phone?
$400
15 * (-3)
-45
A scaled drawing has a structure that measures 5 cm by 17 cm on the drawing. The scale is 1 cm: 15 feet. What is the actual size of the structure?
75 feet by 255 feet
Which equation shows a proportional relationship? y=2x or y = x/2
What is the COP?
y = 2x
COP = 2
Find the area of a circle with a radius of 6 inches - leave in terms of pi.
Area = r*r*pi = 6*6*pi = 36(pi) square inches
Sue bought x yards of fabric. The next day Kim bought 1/2 yard more than Sue. Write an equation representing the relationship between the yards of fabric Sue bought ,x, and the amount of fabric Kim bought, y.
y = x + (1/2)x or y = 1 1/2 x
-5 - (-24)
19
The old trail map has a scale of 1 cm to 100 m. The new trail map has a scale of 1 cm to 500 m. If the maps represent the same area, are the trails on the new map longer, shorter, or the same length as the old map?
Shorter
The paint color requires 3/4 cups of red paint for every 3/5 cups of blue paint. If I am making the same color with 6 cups of red paint, how much blue paint do I need?
4 4/5 cups of blue paint
The circumference of a circle is 60(pi) inches. What is this circle's diameter?
60 inches
A store increased the price of sneakers by 15%. Write an equation to calculate the new total cost, c, when the original price is p dollars.
c = 1.15p
-6/2 + (-5) * (-2) - 5
2