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3 years ago

Which of the binomials below is a factor of this expression? 121A2-64B2

Mathematics

1 answer:

WARRIOR [948]3 years ago

6 0

Answer: 11A + 8B

Step-by-step explanation:

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What is the slope of y=-4x+5

myrzilka [38]

Answer:

the slope is -4.

Step-by-step explanation:

To find the slope, look at the number in front of the x which is known as the coefficient. Hope this helps :)

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3 years ago

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Which represents the pattern in the table below?

Tema [17]

The answer seems to be the third option C = S + 4

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3 years ago

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A weight suspended by a spring vibrates vertically according to the function D D given by D(t)=2sin(4π(t+18)) D ( t ) = 2 sin (

STALIN [3.7K]

Answer:

21.75 cm/s

Step-by-step explanation:

1 cm above central position means D = 1, so we plug in 1 into D(t) and find the time and which this occurs.

$D(t)=2Sin (4\pi(t+18))\\1=2Sin (4\pi(t+18))\\\frac{1}{2}=Sin(4\pi t +72\pi)\\4\pi t + 72 \pi = \frac{\pi}{6}\\4\pi t = \frac{\pi}{6}-72\pi\\t=\frac{\frac{\pi}{6}-72\pi}{4\pi}$

This is the time at which this occurs.

To find instantaneous rate of change, we differentiate D(t) and plug in this t we found. Remembering that d/dt (Sin t) = Cos t

$D(t)=2Sin (4\pi(t+18))\\D(t)=2Sin(4\pi t + 72\pi)\\D'(t)=2Cos(4\pi t + 72\pi)(4\pi)$

Now putting t:

$D'(t)=2Cos(4\pi t + 72\pi)(4\pi)\\D'(\frac{\frac{\pi}{6}-72\pi}{4\pi})=2Cos(4\pi (\frac{\frac{\pi}{6}-72\pi}{4\pi}) + 72\pi)(4\pi)\\=8\pi Cos(\frac{\pi}{6})\\=21.75$

Thus, the instantaneous rate would be around 21.75 cm/s

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3 years ago

3x - 6 = 18 solve for x

mr Goodwill [35]

Answer:

x=8

Step-by-step explanation:

You move all terms that don't contain x to the right side and solve.

3x-6=18

3x=24

x=8

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3 years ago

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If f(x) = 2x2 + 1, what is f(x) when x = 3? O 1 O 7 O 13 O 19

Slav-nsk [51]

Answer:

Step-by-step explanation:

f(x) = 2x^2 + 1

Let x= 3

f(3) = 2 * (3)^2 +1

Exponents first

= 2 * 9+1

Then multiply

= 18+1

Add

= 19

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3 years ago