2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Cross Multiplication The “rate” stuff.

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Presentation transcript:

2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Cross Multiplication The “rate” stuff Similarly… Percents Number Cubes Marbles and Other Fun Things

X = 45

Y= Or 5.8

15 = t

X=7

Change into a unit rate.

To a Unit Rate

An 8 oz. bottle of lotion costs $4.50 How much does it cost per 1 oz?

About $0.56 per oz

Into ft. per second.

9 15 x 12 Solve for x

X=7.2

x Solve for x

X=1.5

x Solve for x. Round to the nearest tenth.

If 1in=2ft and a building is 48 ft. wide in real-life, how wide will it be in the drawing?

It will be 4 in wide in the drawing.

A model car is 6.75 in. long. If the scale is 1in=32in, how long is the real car?

The real car would be 216 in. long

What percent of 72 is 18?

25%

What is 38% of 60?

22.8

22.5% of what is 18?

80

I=Prt You invest $1200 for 4 years. If you earn $312 in interest, what was the percentage rate?

6.5%

1985-gas costs $ gas costs $1.56 Find the percent of change

30% increase

ALGEBRA P(vowel)=?

If you roll a number cube twice, what is P(even# then 5)

You have 7 pink, 4 white, 3 yellow and 2 green tennis balls. Without replacing, what is P(pink then pink)

You have 7 blue, 5 yellow, and 8 white marbles With replacing, what is P(blue then yellow)

If P(A)= And P(B)= Find P(A and B)