7.1 Ratios and Rates
Write each ratio in lowest terms.
8 to 12
2 to 3
3/4/2 x 4/[] = 3/8
4
Solve for each proportion.(100-500)
10/15=8/x
x=12
Find the missing scale factor or length.(100-500)
toy car 1 in:64 in. AL 188.3 in.
AL=Actual Length ML= Model Length
2.94 in.
Use the constant of proportionality to find the missing terms.(100-200)
[x/y] 0.5/1.5, []/7.5, 4/[]
2.5;12
(51/1), ( /2), ( /3), (330/ )
110;165;6
Express each number as a fraction in lowest terms.[keep it in a improper fraction]
(200-300)
27
27/1
16/24=v/15
v=10
House
0.25 in. : 1ft AL=60 ft
15 in.
[x/y] 4/3/4, []/6, 1.6/[]
2;4.8
Determine whether each comparison can be written as a rate. If so, write the simplified rate & unit rate.If not, write not a rate. ( For 300 & 500 )
34 mi in 4 hr
17 mi :2 hr;8.5 mi/hr
1.55
31/20
w/21=24/14
w=36
Room
ML=3/4 in. AL=12ft
1 in. : 60ft
find the constant of proportionality and write the equation describing the proportional relationships.(300-400)
[x/y] 0.75/3, 1.5/6
k=4;y=1.25x
A grade of 85 compared to a grade of 92.
not a rate.
Complete each ratio table.
4/1, []/2.5, 30/[]
10, 7.5
3:5=1.2:o
o=2
Coal car
ML-8in. AL=64ft
1in. : 8ft
[x/y] 4/5, 6/7.5
k=1.25;y=1.25x
5´4in. compared to 4 ft 10in.
not a rate.
Solve.
20/70=4/n
n=14
z is to 9/10 as 2 is to 4& 1/2
z=2/5
House
0.25in. : 1ft ML=18.75in.
AL=75ft
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