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3 years ago

15

Factor completely 2x^2+6x-80

1 answer:

Rom4ik [11]3 years ago

7 0

Answer:

x= -8 , x=5

Step-by-step explanation:

2x^2+6x-80=0

x^2+3x-40=0

look for 2 numbers that their:

sum = 3

product = -40

(x+8)(x-5)=0

thus

x= -8 , x=5 (ANS)

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Factor this trinomial completely.<br> 2x + 10x + 8

Anastaziya [24]

Answer:

4(3x+2)

Step-by-step explanation:

Find the GCF (greatest common factor).

GCF=2

Factor out the GCF.

$2(\frac{2x}{x}+\frac{10x}{2}+\frac{8}{2})$

Simplify.

2(x+5x+4)

Collect the like terms x and 5x.

2(6x+4)

Factor out the number 2, because 2*3=6 and 2*2=4.

2*2(3x+2)

Simplify to get the answer.

4(3x+2)

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3 years ago

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Kazeer [188]

Answer: the answer is C

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2 years ago

The radius of a circle is 2.9 in. Find the circumference to the nearest tenth.

ELEN [110]

Answer:

$\bf \large 20 \: inches$

Step-by-step explanation:

<h2>Given that :</h2>

The radius of a circle is 2.9 in.

<h2>to find :</h2>

Find the circumference to the nearest tenth.

<h2>formulas used :</h2>

circumference = 2 × π × r

where,

π = 22/7
r = 2•9 inches

<h2>explanation :</h2>

⟼ c = 2πr

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⟼ c = 2 × 3•14 × 2•9 inches

⟼ c = 6•28 × 2•9 inches

⟼ c = 18•21 inches.

<h2>Round to the nearest tenth :</h2>

⟼ c = 18•21 inches

⟼ c = 20 inches

∴ circle circumference is 20 inches .

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Step-by-step explanation:

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3 years ago

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algol13

Answer:

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Step-by-step explanation:

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