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Ratling [72]
3 years ago
12

Which expressions have a value of 128 when x = 4? Type your answer

Mathematics
1 answer:
IrinaVladis [17]3 years ago
3 0
32 Is the answer simple division
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Marvin wants to purchase a rectangular rug. It has an area represented by the expression 4x^2+64x+256. what is the length and wi
jasenka [17]

Answer: the length and width are

(x + 8) and (x + 8)

Step-by-step explanation:

The rug has an area represented by the expression

Area = 4x² + 64x + 256.

The factors in the factored expressions represent the length and width of the rug.

Dividing the the equation by 4, it becomes

x² + 16x + 64 = 0

We would find two numbers such that their sum or difference is 16x and their product is 64x^2.

The two numbers are 8x and 8x. Therefore,

x² + 8x + 8x + 64 = 0

x(x + 8) + 8(x + 8) = 0

The factors are

(x + 8)(x + 8)

7 0
3 years ago
Which is bigger, <br> a) 70% of 300 <br> b) ¼ of 600?<br> ∞Δ∞
Artist 52 [7]
Since 300 is 100%, you treat it as such.

300/(100/70) = 210 (rounded)


You do a similar thing for 600

1/4 of 100 is 25
100/25 = 4
600 / 4 = 150



70% of 300 is more.




4 0
3 years ago
-5 = 7 + -4/5x<br><br> I just need answer
Goryan [66]
Answer: x=15

Answer: x=15
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8 0
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Answer:

Step-by-step explanation:

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On Monday your run on a treadmill for 1/2 hour at x miles. how do you solve it
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