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yan [13]
3 years ago
15

4x²-17x-42 by factor

Mathematics
1 answer:
kkurt [141]3 years ago
5 0
4x²-17x-42
=4(x²-17/4x)-42
=4[x²-17/4  x+(-17/8)²-(-17/8)²]-42
=4(x-17/8)²-289/64-42
=4(x-17/8)²-(289+2688)/64
=4(x-17/8)²-2974/64
=[(2x-34/8)²-(√2974/8)²]
=(2x-34/8  +(√2974/8))(2x-34/8-(√2974/8)
=[2x+(√2974-34)/8][2x-(√2974+34)/8]

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Answer:

x = 2

Step-by-step explanation:

the formula for this problem is

Area = 1/2 base x Height

step 1) plug in what we know

5 = 1/2 base(5)

step 2) switch sides

1/2 base x 5 = 5

step 3) divide both sides by 1/2 x 5

\frac{1/2 base( 5)}{1/2(5)} = \frac{5}{1/2(5)}

step 4) Simplify

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3 years ago
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Levart [38]

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Step-by-step explanation:

Use the formula of y2-y1/x2-x1 to find the slope

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3 years ago
The Environmental Protection Agency must visit nine factories for complaints of air pollution. In how many ways can a representa
kirill115 [55]

Answer:

The number of ways is  \left 9}\atop } \right. P _5 = 15120

Step-by-step explanation:

From the question we are told that

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The number of way to visit the 5 factories is mathematically represented as

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Where P represents  permutation

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3 years ago
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miss Akunina [59]
Tyson
P=8.9 x 4hrs=35.60$
8.9 x 8hr=71.20$
8.9 x 12hr=106.80$
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4hr. 35.60$
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Jamaal
4hr. 38.00$
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3 years ago
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Answer:

B. 143

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