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2 years ago

CAN SOMEONE PLEASE ANSWER THIS QUICK I HAVE 5 MINS PLS

Mathematics

1 answer:

alex41 [277]2 years ago

6 0

Answer:

$20

Step-by-step explanation:

49 is the outlier

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A contractor is required by a county planning department to submit one, two, three, four, or five forms (depending on the nature

Anuta_ua [19.1K]

Answer:

a) c = 1/15

b) =2/5

c) = 3/5

d) No, it cannot be the PMF of y.

Step-by-step explanation:

We have that

$p_X(x)\geq0$

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3 years ago

30% increase on $50 help I need the answer nowww

Bond [772]

Answer:

$65

Step-by-step explanation:

30% of 50 is 15, so 50+15=65.

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2 years ago

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Write an equation of the line that passes through (4,-6) and is parallel to the line y=-3x-9

murzikaleks [220]

Answer:

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Step-by-step explanation:

Hope this helped you!

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3 years ago

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Travka [436]

Answer:

A translation

Step-by-step explanation:

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2 years ago

The height of a ball thrown into the air after t seconds have elapsed is h = −16t2 + 40t + 6 feet. What is the first time, t, wh

sp2606 [1]

<h3>The first time when the ball will reach a height of 20 feet is 0.42 seconds</h3>

Solution:

Given that,

The height of a ball thrown into the air after t seconds have elapsed is:

$h = -16t^2 + 40t + 6$

What is the first time, t, when the ball will reach a height of 20 feet?

Substitute h = 20

$20 = -16t^2 + 40t + 6\\\\-16t^2 + 40t + 6 -20 = 0\\\\-16t^2 + 40t -14 = 0\\\\16t^2 -40t + 14 = 0\\\\8t^2 -20t + 7=0$

Solve by quadractic formula

$\mathrm{For\:a\:quadratic\:equation\:of\:the\:form\:}ax^2+bx+c=0\mathrm{\:the\:solutions\:are\:}$

$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$\mathrm{For\:}\quad a=8,\:b=-20,\:c=7$

$t = \frac{-\left(-20\right)\pm \sqrt{\left(-20\right)^2-4\cdot \:8\cdot \:7}}{2\cdot \:8}\\\\t = \frac{20 \pm \sqrt{176}}{16}\\\\t = \frac{20 \pm 4\sqrt{11}}{16}\\\\t = \frac{ 5 \pm \sqrt{11}}{4}\\\\We\ have\ two\ solutions\\\\ t=2.07915, \:t=0.42084$

Rounding off we get,

t = 2.08 , t = 0.42

Thus the first time when the ball will reach a height of 20 feet is 0.42 seconds

4 0

3 years ago