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gavmur [86]
3 years ago
12

Mr. Carter drove 638 miles the first weekend. He drove 243 miles the second weekend.

Mathematics
2 answers:
inna [77]3 years ago
8 0
The answer rounded would be 400
zaharov [31]3 years ago
7 0
638-243 = 395 miles

rounding up, it would be 400 miles
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Answer:

\frac{\left(h+c\right)cr^2}{h\left(r^2-c^2\right)}

Step-by-step explanation:

\frac{\frac{1}{c}+\frac{1}{h}}{\frac{1}{c^2}-\frac{1}{r^2}}

Combine \frac{1}{c} + \frac{1}{h}

\frac{\frac{h+c}{ch}}{\frac{1}{c^2}-\frac{1}{r^2}}

Combine the bottom, too.

=\frac{\frac{h+c}{ch}}{\frac{r^2-c^2}{c^2r^2}}

Apply the fraction rule

=\frac{\left(h+c\right)c^2r^2}{ch\left(r^2-c^2\right)}

Cancel

=\frac{\left(h+c\right)cr^2}{h\left(r^2-c^2\right)}

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3 years ago
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3 0
3 years ago
The ratio of boys to girls in math classes is 3.5. If there are 130 girls in these classes, how many boys must there be?
dsp73

Answer:

<h3><u>Required Answer</u><u>:</u><u>-</u></h3>

The ratio of boys and girls =3:5

Let

Number of boys=3x

Number of girls =5x

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{:}\longrightarrow\sf 5x=130

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{:}\longrightarrow\sf x={\dfrac {130}{5}}

{:}\longrightarrow\sf x=26

<h3>Now </h3>

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=3×26=78

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