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Veseljchak [2.6K]
3 years ago
7

21 POINTS! what is value of x?

Mathematics
2 answers:
podryga [215]3 years ago
5 0

Answer:

5

Step-by-step explanation:

what the other guy said lol :)

defon3 years ago
4 0

Answer:

5

Step-by-step explanation:

Using the Pythagorean theorem:

a^2 + b^2 =  c^2

3^2 + 4^2 = c^2

9 + 16 = c^2

c^2 = 25

c = 5

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For what values of them will the expression below be a perfect square? <br> 9x^2+30x+m
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4 0
3 years ago
Pls i need help with #5 it’s so hard and I’m struggling with it and what’s the answer
Svetradugi [14.3K]

Answer:

7.5

Step-by-step explanation:

Lets define what we're looking for, the "number", to be equal to x.

number = x

Following the questions hints:

" The sum of twice a number and three times a number"

(2x) + (3x)

is (which means equals to basically)

" triple the quantity of five more than a number"

3(x+5)

We connect all of this to find the number and get:

(2x) + (3x) = 3(x+5)

5x = 3x + 15

5x -3x = 15

2x = 15

x = 15/2

x = 7.5

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