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Scrat [10]
3 years ago
11

Out of 21 students in Mrs.Clarks class, 3/7 of the class are boys and 4/7 are girls. How many students in the class are girls an

d how many are boys?
Mathematics
1 answer:
lidiya [134]3 years ago
8 0

Answer:

9 boys and 12 girls

Step-by-step explanation:

if you multiply the denominators by 3, you get "out of" 21. All you need to do after that is multiply the top by 3 as well and it tells you there are 9 boys and 12 girls.

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Math question please help
spin [16.1K]

The formula of a midpoint of the segment between the points

(x_1,\ y_1),\ (x_2,\ y_2)\\\\M\left(\dfrac{x_1+x_2}{2},\ \dfrac{y_1+y_2}{2}\right)

We have:

(17,\ -11),\ (-14,\ -16)

Substitute:

M\left(\dfrac{17+(-14)}{2},\ \dfrac{-11+(-16)}{2}\right)\to M\left(\dfrac{3}{2},\ \dfrac{-27}{2}\right)

<h2>Answer: B.</h2>
8 0
2 years ago
Investment of $2000 at 10% simple interest for 9 years
Oliga [24]

Answer:

The last investment (C) has the least interest of $600

The other two investments (A and B) have the <u>same</u> amount of interest of $1800.

Step-by-step explanation:

<u>Simple Interest Formula</u>

I = Prt

where:

  • I = interest earned
  • P = principal
  • r = interest rate (in decimal form)
  • t = time (in years)

<u>Investment A</u>

  • P = $2000
  • r = 10% = 0.1
  • t = 9 years

Substitute the given values into the formula and solve for I:

⇒ I = 2000(0.1)(9)

⇒ I = $1800

<u>Investment B</u>

  • P = $3000
  • r = 3% = 0.03
  • t = 20 years

Substitute the given values into the formula and solve for I:

⇒ I = 3000(0.03)(20)

⇒ I = $1800

<u>Investment C</u>

  • P = $2000
  • r = 10% = 0.1
  • t = 3 years

Substitute the given values into the formula and solve for I:

⇒ I = 2000(0.1)(3)

⇒ I = $600

The last investment (C) has the least interest of $600.

The other two investments (A and B) have the <u>same</u> amount of interest of $1800.

8 0
1 year ago
What is an equation of the line that passes through the points (0,2) and (5,8)
motikmotik

Answer: y=\frac{6}{5}+2

Step-by-step explanation:

<em>This is y intercept form</em>

First you find the slope

Then you find the y intercept and plug it in t the equation y=mx+b

5 0
3 years ago
A police department reports that the probabilities that 0, 1, 2, and 3 burglaries will be reported in a given day are 0.49, 0.39
Lostsunrise [7]

Answer: cops are pigs

Step-by-step explanation: they smell like bacon

8 0
3 years ago
How many positive integers n satisfy the following condition: (130n)^50 &gt; n^100 &gt;2^200
kenny6666 [7]

Answer:

27

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
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