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2 years ago

4/7 of the students in a classroom are girls if there are nine boys in the class how many total students are there ?

Mathematics

1 answer:

sergeinik [125]2 years ago

3 0

Answer:

21 students were in the class.

Step-by-step explanation:

The information in the question tells you that 4/7 of the class is girls.

That means that the remainder of the class is 1 - 4/7 = 3/7 boys

Let the total in the class = x

(3/7)x = 9 Multiply by 7

(3/7)*7*x = 9 * 7 Simplify the right and left

3x = 63 Divide by 3

3x/3 = 63/3

x = 21

There were 21 students in the class.

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What is the opposite of 4

horsena [70]

Negative 4 or -4 is the answer

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2 years ago

Exercise 1: In the right triangle below, calculate the measurement of the unknown side. Show your work.

vekshin1

Answer:

Exercise 1:

base [b]=8cm

perpendicular [p]=6cm

hypotenuse [h]=?

By using Pythagoras law

h²=p²+b²

h²=6²+8²

h=√100

h=10cm

So another side's length is 10cm

Exercise 2:

base [b]=6m

perpendicular [p]=bm

hypotenuse [h]=8m

By using Pythagoras law

h²=p²+b²

8²=b²+6²

b²=8²-6²

b=√28=2√7 0r 5.29 or 5.3

So height of kite is√28or 2√7 0r 5.29 or 5.3 m

Step-by-step explanation:

[Note: thanks for translating]

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2 years ago

Midpoint (2,5) (-1,9)

Natasha_Volkova [10]

The midpoint of the 2 points is (0.5, 7)

Hope this helps you

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3 years ago

What is the factored form of x2 - 10x + 24

umka2103 [35]

Answer:

(x-6) (x-4)

Step-by-step explanation:

x^2 - 10x + 24

What 2 numbers multiply to 24 and add to -10

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(x-6) (x-4)

4 0

3 years ago

3/8 is 4 & 3/5 % of what number? (Round to the nearest hundredth.)

Harman [31]

Answer:

n = 8.15

Step-by-step explanation:

3/8 is 4 & 3/5 % of what number?

Rewrite this as: 3/8 is (4 3/5)% of what number?

Convert 4 3/5% into a decimal: 0.046

Then write out and solve the equation 3/8 = 0.046n, where n is the unknown number.

Dividing both sides by 0.046, we get n = 8.15

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2 years ago