When are fractions useful? When are ratios useful?

1 answer:

8 0

Fractions are useful for constant of proportionality, ratios, and just simplifying decimals. Ratios are good for recipes

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Claudia's father is 7 times as old as Claudia. 20 years from now, Claudia will be 1/2 as old as her father. How old is Claudia's

Rudik [331]

I hope this helps you

Claudia x

father 7x

20 years later

x+20= 1/2 (7x+20)

2 (x+20)=7x+20

2x+40=7x+20

5x=20

x= 8

father 7.8=56

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3 years ago

Help me with this question.

Elanso [62]

Answer : T = 2,116 miles

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3 years ago

How much will I get if I get a 8 percent of $108000

iren [92.7K]

Answer:

8,640

Step-by-step explanation:

EASY PERIOD

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3 years ago

I don't know how to do this or what i'm doing plz help

mote1985 [20]

recalling that d = rt, distance = rate * time.

we know Hector is going at 12 mph, and he has already covered 18 miles, how long has he been biking already?

$\bf \begin{array}{ccll} miles&hours\\ \cline{1-2} 12&1\\ 18&x \end{array}\implies \cfrac{12}{18}=\cfrac{1}{x}\implies 12x=18\implies x=\cfrac{18}{12}\implies x=\cfrac{3}{2}$

so Hector has been biking for those 18 miles for 3/2 of an hour, namely and hour and a half already.

then Wanda kicks in, rolling like a lightning at 16mph.

let's say the "meet" at the same distance "d" at "t" hours after Wanda entered, so that means that Wanda has been traveling for "t" hours, but Hector has been traveling for "t + (3/2)" because he had been biking before Wanda.

the distance both have travelled is the same "d" miles, reason why they "meet", same distance.

$\bf \begin{array}{lcccl} &\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\ \cline{2-4}&\\ Hector&d&12&t+\frac{3}{2}\\[1em] Wanda&d&16&t \end{array}\qquad \implies \begin{cases} \boxed{d}=(12)\left( t+\frac{3}{2} \right)\\[1em] d=(16)(t) \end{cases}$

$\bf \stackrel{\textit{substituting \underline{d} in the 2nd equation}}{\boxed{(12)\left( t+\frac{3}{2} \right)}=16t}\implies 12t+18=16t \\\\\\ 18=4t\implies \cfrac{18}{4}=t\implies \cfrac{9}{2}=t\implies \stackrel{\textit{four and a half hours}}{4\frac{1}{2}=t}$

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Jovan has $14,000 in a savings account. The savings collect interest at a 7% annual rate that compounds every year. How much mon

wel

Answer:

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Step-by-step explanation:

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