Transcript Slide 1

Grade Lesson 13 part 2
If you divide each
side of an
equation by the
same nonzero
number, the two
sides remain
equal.
4c  44
k
2
12
If you multiply
each side of an
equation by the
same number, the
two sides remain
equal.
9b  72
m
10 
7
without solving the
equation, tell what you
know about the value of
x in the equation x
25
 300
Something like: x
is greater than
300.
34  2x
u
6
9
When you multiply a
number by -3, the result
is 39.
3n  39
An African elephant can eat
500 pounds of vegetation
per day. How many days will
a 3000 pound supply last for
one elephant?
500d  3000
The quotient of a
number and 7 is -14.
n
 14
7
The base B of a triangular
prism has an area of 24
square inches. If the
volume V of a prism is 216
cubic inches, use the
formula V = Bh to find the
height of the prism in
inches.
Josh charges $15 to mow an
average size lawn in his
neighborhood. How many
lawns does he need to mow
to earn $600?
15 L  600
Luis ran 2.5 times the
distance that Mark ran. If
Mark ran 3 miles, which
equation can be used to
find the distance d in miles
that Luis ran?
A) d = 2.5 + 3
B) d + 2.5 = 3
C) d = 2.5(3)
D) 2.5d = 3
Lesson 14
• Notes
Objective: Unit Rates
A __________ is a comparison of two
numbers by division.
3
5
7
4
Since a ratio can be written as a fraction it
can be _____________.
2
1

4
2
A ________ is a ratio that compares two
quantities with different types of units.
15 boys to 30 girls
4 candy bars for $2
John paid $40 for 5 pizzas. How much did
John pay for each pizza?
A _______________ is a rate with a
denominator of one.
Express the rate as a unit rate.
$132 in 3 hours
142 miles on 10 gallons
Express the ratio in simplest form.
6 inches out of 18 feet
$35 for 15 dozen cookies
Express the rate as a unit rate.
11,025 tickets for 9 days
$2.10 for 6 cans
Which is the better buy?
17 oz box of cereal for $4.89 or
21 oz box of cereal for $5.69