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WARRIOR [948]
3 years ago
9

Solve the equation. x2 + 8x − 9 = 0 A) x = 1 B) x = 9 C) x = 9 or x = −1 D) x = −9 or x = 1

Mathematics
2 answers:
yarga [219]3 years ago
7 0

Answer:D. X= -9 or x= 1

X2 + 8x - 9 = 0

iris [78.8K]3 years ago
4 0

Answer:

x=1 or x=-9

Step-by-step explanation:

x^2 + 8x − 9 = 0 (8x=9x-x)

x^2 - x+9x-9=0

x(x-1)+9(x-1)=0

(x-1)(x+9)=0

x-1=0 or x+9=0,then

x=1 or x=-9

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1. Noah had $ 5.25 and Lin had $ 8.95. How much did they have altogether?
amid [387]

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4 0
3 years ago
A spherical tank holds about 7,234.56 cubic meters of air.
Inessa [10]

Answer:

The radius of the spherical tank is 12 meters

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In this question, we are tasked with calculating the radius of the spherical tank given the volume of air it can hold

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Thus, 7234.56 = 4/3 * 3.14 * r^3

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8 0
3 years ago
Are the solutions correct?
Aloiza [94]

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3 years ago
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