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bogdanovich [222]
3 years ago
6

Ebony earns 2000 a month if she spends 450 a month

Mathematics
1 answer:
Brrunno [24]3 years ago
8 0

Answer:::::::::::

22.5%

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Write the slope-intercept form of the equation of each line. identify the slopes y-intercept.
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Answer:

1. 3,0,y=3x

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if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is .....a.2 b.-2 c 1/2 d.none ​
blsea [12.9K]

Answer:

k=2

Problem:

if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is ..

Step-by-step explanation:

Since the coefficient of x^2 is 1, we can use this identity to aid us: x^2+bx+(b/2)^2=(x+b/2)^2.

So we want the following:

[(k+2)/2]^2=2k

Apply the power on the left:

(k+2)^2/4=2k

Multiply both sides by 4:

(k+2)^2=8k

Expand left side:

k^2+4k+4=8k *I used identity (x+c)^2=x^2+2xc+c^2

Subtract 8k on both sides:

k^2-4k+4=0

Factor using the identity mentioned a couple lines above:

(k-2)^2=0

Since zero squared is zero, we want k-2=0.

Adding both sides by 2 gives k=2.

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3 years ago
Please help me (NO LINKS)
tatuchka [14]

Answer:

0.25( \frac{1}{4} ) \\ 0.50( \frac{2}{4}) \\ 1.25(1 \frac{1}{4} )

hope it's what u want

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2 years ago
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