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larisa86 [58]
3 years ago
15

Which of the following is a solution of x2 + 6x = −18?

Mathematics
1 answer:
Rus_ich [418]3 years ago
6 0
X= 9/4 i think i dont know
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Answer this one for me thanks ppppp
Brilliant_brown [7]

Answer:

16.6 units

Step-by-step explanation:

Hi there!

We can use the Pythagorean theorem to help us solve this problem: a^2+b^2=c^2 where c is the longest side of a right triangle (the hypotenuse) and a and b are the other two sides

It's safe to assume that x is the longest side in this triangle, making it the c value. Plug 14 and 9 into the equation as a and b and solve for x:

14^2+9^2=x^2\\196+81=x^2\\277=x^2\\x=16.6

Therefore, the value of x is 16.6 units when rounded to the nearest tenth.

I hope this helps!

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2 years ago
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777dan777 [17]

Answer:

h= the number 7 duh-

Step-by-step explanation:

7 0
2 years ago
the hardware store where you work charges .80 cents including tax for a pound of nails. a customer purchases 5 3/4 pounds of nai
kkurt [141]

Answer:

$4.60

Step-by-step explanation:

The customer will pay $0.80 per pound.  They are buying 5 and 3/4 pounds of nails, so they will pay..

$0.80(5) + $0.80(3/4) for the nails...now simplify...

$4.00 + $0.60 = $4.60

7 0
3 years ago
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What is the completely factored form of x^4+8x^2-9
miss Akunina [59]

Answer:

I think it is (x^2+9) x (x-1) x (x+1)

Step-by-step explanation:

(not sure if right but had a go)

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3 years ago
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Kamila [148]
C. 2/3; reduction
have a good day
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