Answer:
f = 1
Step-by-step explanation:
Use the method of cross- multiplication
= 
⇒ ad = bc, thus
20f = 5(f + 3) ← distribute
20f = 5f + 15 ( subtract 5f from both sides )
15f = 15 ( divide both sides by 15 )
f = 1
Answer:195 cans
Step-by-step explanation:
y=-63x+825
y=number of cans
x=number of days
When number of days is 10 that is x=10
y=-63x+825
y=-63x10+825
y=-630+825
y=195
number of cans=195
The mode of this set of data is 12
9514 1404 393
Answer:
a. 38
b. 95
c. 57
Step-by-step explanation:
In this context, you can consider "of" to mean "times." It can also be helpful to think of % as meaning /100.
a. p = 20% × 190
p = 20/100 × 190 = 38 . . . . you have 38 pennies
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b. 190 = 200% × r
190 = 200/100 × r . . . . replace % with /100
190 = 2 × r . . . . . . . . . simplify the fraction
190/2 = r = 95 . . . . you have 95 rare coins
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c. n = 60% × r
n = 60/100 × 95 = 57 . . . . you have 57 nickels
