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3 years ago

Multiply (−4)(−2)(−5). (5 points)

Mathematics

2 answers:

igor_vitrenko [27]3 years ago

8 0

Answer: -40

Step-by-step explanation:

The answer is -40 because (-4)(-2) = 8; 8(-5)= -40.

A positive times a negative equals a negative.

a negative time a negative equals a positive.

Remember Sleepy man/Dead man.

Sergeu [11.5K]3 years ago

6 0

Answer:

-40

Step-by-step explanation:

(-4)(-2) = positive 8

(8)(-5) = negative -40

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zimovet [89]

Answer: ( − 2) ( + 9)

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3 years ago

Determine the amplitude (A), period (P), and phase shift (PS) of the function f(x)= 3sin(x-4)+9

Tpy6a [65]

ANSWER

D.
$A=3,P=2\pi,PS=(4,9)$

EXPLANATION

The given function is

$f(x) = 3 \sin(x - 4) + 9$

Comparing to the general form of a trigonometric sine function,

$f(x) = A \sin(Bx-C)+D$

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The amplitude is absolute value of A

$|A| = |3| = 3$

$B=1$

The period is given by

$p = \frac{2\pi}{ B}$

$p = \frac{2\pi}{ 1} = 2\pi$

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is a shift to the right of 4 units.

and

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is an upward shift of 9 units

Therefore the phase shift is (4,9).

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6 0

3 years ago

Solve for x. 3x ^2 -4 = 8

LenKa [72]

Answer:

x = ±2

Step-by-step explanation:

3x ^2 -4 = 8

Add 4 to each side

3x ^2 -4+4 = 8+4

3x^2 =12

Divide each side by 3

3x^2 =12

3x^2/3 = 12/3

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Take the square root of each side

sqrt(x^2) = ±sqrt(4)

x = ±2

5 0

3 years ago

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Romashka [77]

Answer:

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NPV $3,099

Step-by-step explanation:

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The net present is the present worth of the future cost savings as well as the scrap value of the truck in year 8,calculated by multiplying the cash flows with the discounted factors for relevant years as below:

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0 -$54,750 1 -$54,750

1-7 years $7500 5.2064 $39,048

8 $34,800 0.54027 $18,801

NPV $3,099

Note that the $34,800 =$7500+$27300

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It means -1x - 2 = 3 those bars make all the number positive

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