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Minchanka [31]
4 years ago
15

Help plz 15. and 16. mathexplain and answer is on side already

Mathematics
1 answer:
Darina [25.2K]4 years ago
5 0
15) x^2-2x-8=1/4x-1
x^2-2.25x-7=0
4x^2-9x-28=0
(x-4)(4x+7)=0
x-4= 0 or 4x+7=0
x=4 or x= -7/4=-1.75
16) answer hides in the f(x) equation
the trick is to think of the value that will make the (x-4) =0 and and the y value can be directly plugged off from the +c
therefore, ans is x=2 y= 4
(2,4)
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Hi can you help me please?)
AlladinOne [14]

<em>*To solve for a specified variable, you need to isolate that variable onto one side.</em>

<h3>11.</h3>

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Next, divide both sides by y and <u>your answer will be \frac{-10-z}{y}=x</u>

<h3>13.</h3>

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5 0
3 years ago
"A day care program has an average daily expense of $75.00. The standard deviation is $5.00. The owner takes a sample of 64 bill
kolbaska11 [484]

Answer:

p=1

Step-by-step explanation:

Given that a day care program has an average daily expense of $75.00. The standard deviation is $5.00.

Sample size = 64

Std error of sample = \frac{5}{\sqrt{64} } \\=0.625

Thus sample mean will follow normal with

(75, 0.625)

Required probability

=P(70

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8 0
3 years ago
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What is the perimeter?
Ad libitum [116K]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
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The length of an arc of a circle is 7.34 units, and the measure of the corresponding central angle is 81 degrees. What is the ap
GuDViN [60]

Answer:

A.  5.19 units

Step-by-step explanation:

\textsf{Arc length}=2 \pi r\left(\dfrac{\theta}{360^{\circ}}\right) \quad \textsf{(where r is the radius and}\:\theta\:{\textsf{is the angle)}

Given:

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Substituting given values into the equation and solving for r:

\implies 7.34=2 \pi r\left(\dfrac{81^{\circ}}{360^{\circ}}\right)

\implies 7.34=r\left(\dfrac{18 \pi}{40}\right)

\implies 7.34 \cdot 40=18 \pi r

\implies 293.6=18 \pi r

\implies r=\dfrac{293.6}{18 \pi}

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7 0
2 years ago
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100 points!! Brainliest if correct!!
ladessa [460]

Answer:

4π(w+1)(w-1)

Step-by-step explanation:

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= 2π(2w^2-2)

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= 4π(w+1)(w-1)

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4 years ago
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