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andrew-mc [135]
4 years ago
7

(8 x __) x 7 = 8 x (9 x 7)

Mathematics
1 answer:
Alja [10]4 years ago
6 0

Answer:

the answer in the blank is 9

Step-by-step explanation:

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Gareth 30 students in a class and the ratio of boys to girls in the class is 2:3 calculate the number of goals
pishuonlain [190]

Answer:

<em>There are 12 boys and 18 girls</em>

Step-by-step explanation:

<u>Equations</u>

There are 30 students in a class. Let's call:

x = number of boys

Since the sum of boys and girls is 30:

30 - x = number of girls

The ratio of boys to girls is 2:3, thus:

\displaystyle \frac{x}{30-x}=\frac{2}{3}

Crossing denominators:

3x = 2(30 - x)

Operating the parentheses:

3x = 60 - 2x

Adding 2x:

5x = 60

Dividing by 5:

x = 60/5 = 12

x = 12

There are 12 boys and 30-12=18 girls

8 0
3 years ago
What is the standard form of y=(x-4)^2-6
Ahat [919]

Answer:

standard form : 2x + y = -2

8 0
3 years ago
How do you solve age word problems
Anna71 [15]
These videos might help you

https://www.khanacademy.org/math/algebra/systems-of-linear-equations/systems-of-linear-equations-wor...

5 0
3 years ago
Carl is boarding a plane he has two checked bags of equal weight and backpack that weighs 4 kg the total weight of Carl’s backpa
Tresset [83]

Answer:

Carl's checked bags way 15.5 kilograms each.

Step-by-step explanation:

35-4=31 -> 31÷2=15.5

7 0
3 years ago
Factor x2-3x - 28
AVprozaik [17]

Answer:

x equal to -4 or 7

Step-by-step explanation:

x square - 3 x - 28 equals 0 so for me are you now find factors of 28 that and you add you add or multiply those two factors to get those two factors to give you 28 so now so you know Factor ways to get (open x + 4) Close x (open x - 7) close equal to zero your ex number comes -4 or 7

5 0
3 years ago
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