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2 years ago

If y varies directly as x, and y=8 when x=5, find y when x=10

Mathematics

1 answer:

Sophie [7]2 years ago

5 0

You have to set it up as a ratio 8/5 = y/10, then you have to cross mutliply and divide. So 8×10=80 and 80/5= 16 so y=16.

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Answer:

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Step-by-step explanation:

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2 years ago

In 1990, the population of Boston, Massachusetts was 574,283. In 2000, the population was 589,141. What is the percent of change

MrMuchimi

Answer:

Percent of change in population is $2.6$ %

Step-by-step explanation:

Given population of Boston is $574,283$ measured in year $1990$ .

And population of Boston in year $2000$ is $589,141$ .

We need to find percent of change in population.

So, percent change $=\frac{New\ population-Old\ population}{Old\ population}\times100$ %

Here old population is $574,283$ and new population is $589,141$

Plugging these value in formula we get,

Percent change $=\frac{589,141-574,283}{574,283}\times100\\\\=\frac{14858}{574,283}\times100=0.0258\times100\\\\=2.587$

Rounding to nearest tenth 2.6%

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2 years ago

X+15° ) + + (x+20°)+(x-10)

il63 [147K]

Answer:

3x+35°-10

Step-by-step explanation:

remove the parentheses so the equation is

x+ 15°+x+20°+(x-10)

3 0

1 year ago