2 years ago

Sharon has some one-dollar bills and some five-dollar bills. she has 14 bills. the value of the bills is $30.

Mathematics

1 answer:

romanna [79]2 years ago

5 0

Four 5 dollar bills and ten 1 dollar bills

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In a fireplace, about 3/4 of an 18 inch log will burn in 1/3 of an hour. How many hours will it take to burn 2 1/2 logs

Karo-lina-s [1.5K]

$\bf \begin{array}{ccll}
\stackrel{burned}{log}&\stackrel{time}{hr}\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
\frac{3}{4}&\frac{1}{3}\\\\
2\frac{1}{2}&h
\end{array}\implies \cfrac{\frac{3}{4}}{2\frac{1}{2}}=\cfrac{\frac{1}{3}}{h}\implies \cfrac{\frac{3}{4}}{\frac{2\cdot 2+1}{2}}=\cfrac{\frac{1}{3}}{\frac{h}{1}}$

$\bf \cfrac{\frac{3}{4}}{\frac{5}{2}}=\cfrac{1}{3}\cdot \cfrac{1}{h}\implies \cfrac{3}{4}\cdot \cfrac{2}{5}=\cfrac{1}{3h}\implies \cfrac{6}{20}=\cfrac{1}{3h}\implies 6\cdot 3h=20\cdot 1
\\\\\\
18h=20\implies h=\cfrac{20}{18}\implies h=\cfrac{10}{9}\implies h=1\frac{1}{9}$

about 1 hour and 6 minutes with 36 seconds.

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2 years ago

Ms.Bass gave her class 12 minuets to read. Carrie read 5 1/2 pages in that time. At what rate, in pages per hour, did Carrie rea

Talja [164]

So, we have

5.5/12

Convert to a denominator of 60, since there are 60 mins in an hour

60/12= 5

Multiply numerator and denominator by 5

5*5.5= 27.5

12*5= 60

So our answer is 27.5/60 or 27.5 pages an hour

I hope this helps :)

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3 years ago

Por favor necesito ayuda

IgorC [24]

Answer: Ingasu, yo tambien no se guey.

Step-by-step explanation: Nomas ponle 35°

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2 years ago

In a lab experiment, 490 bacteria are placed in a petri dish. The conditions are such that the number of bacteria is able to dou

andrew11 [14]

Answer:

20.5

Step-by-step explanation:

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2 years ago

Which is proportional to 3/4?

Serjik [45]

6/8 because 3/4*2=6/8
hope this helps

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2 years ago