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4 years ago

In a high school, 2/5 of the girls make up 150 students.

Mathematics

1 answer:

poizon [28]4 years ago

5 0

Answer:

375 girls

Step-by-step explanation:

Let the number of girls in the school be y.

Then, we can write the equation:

$\frac{2}{5} y = 150$

We can now solve for y by multiplying both sides by

$\frac{5}{2}$

$\frac{5}{2} \times \frac{2}{5} y = 150 \times \frac{5}{2}$

$\implies \: y = 75 \times 5$

$y = 375$

Therefore there are 375 girls in the school.

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weqwewe [10]

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h = -16t² + 60t + 3

a=-16 b=60 c=3

$t = \frac{-b +/- \sqrt{b^{2}-4ac } }{2a}$

$t = \frac{-60 +/- \sqrt{60^{2}-4(-16)(3) } }{2(-16)}$

$t = \frac{-60 +/- \sqrt{3600 + 192} }{-32}$

$t = \frac{-60 +/- \sqrt{3792} }{-32}$

$t = \frac{-60 +/- 61.6}{-32}$

$t = \frac{-60 + 61.6}{-32}$ or $t = \frac{-60 - 61.6}{-32}$

$t = \frac{1.6}{-32}$ or $t = \frac{-121.6}{-32}$

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Answer: 3.8 seconds

8 0

4 years ago

It takes Jada 20 minutes to walk to school. It takes Andre 80% as long to walk to school. How long does it take Andre to walk to

dsp73

I believe the answer is 100 minutes.

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3 years ago

G(1) = 0 = lgn= ) +m g(n) = g(n - 1) +n = - n g(2) =

yKpoI14uk [10]

Answer:

g(1) = 0

lgn= ) +m

g(n) = g(n - 1) +n

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Step-by-step explanation:

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2 years ago

The sum of three consecutive natural numbers is 1251 find the numbers

valentinak56 [21]

Numbers are 416, 417 and 418

Step-by-step explanation:

Step 1:

Let the numbers be x, x + 1 and x + 2. Given that their sum is 1251.

⇒ x + x + 1 + x + 2 = 1251

⇒ 3x + 3 = 1251

⇒ 3x = 1248

⇒ x = 416

Step 2:

Find the other numbers.

⇒ x + 1 = 417 and x + 2 = 418

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3 years ago

Roberto rowed 20 miles downstream in 2.5 hours. The trip back, however, took him 5 hours. Find the rate that Roberto rows in sti

almond37 [142]

Answer:

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Step-by-step explanation:

Relative Speed

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$d=v.t$

When Roberto rows downstream, his speed in still water is added to the speed of the water, making it easier to travel the required distance.

When Roberto rows upstream, his speed in still water is affected by the speed of the water, both are subtracted and the required distance is covered in more time.

Let's call

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