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3 years ago

4x²-17x-42 by factor

1 answer:

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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MariettaO [177]

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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step 5) Simplify

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3 years ago

What is the slope intercept form of (3, -2) and (0,4)

Levart [38]

Answer:

Slope is 2/-1 the equation would be y=2/-1x+4

Step-by-step explanation:

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

Plot the two points on a graph and find the y int. (:

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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

The number of factories visited is $n = 9$

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

$\left 9}\atop } \right. P _5 = \frac{9!}{(9-5)!}$

Where P represents permutation

=> $\left 9}\atop } \right. P _5 = \frac{9 \ !}{4\ !}$

=> $\left 9}\atop } \right. P _5 = \frac{9 *8*7 * 6 * 5 * 4!}{4\ !}$

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3 years ago

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Tyson
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Jamaal
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3 years ago

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fredd [130]

Answer:

B. 143

Step-by-step explanation:

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3 years ago