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omeli [17]
2 years ago
5

Ninety-five percent of test scores fall between 72 and 85. Assuming the data is normally distributed, what is

Mathematics
1 answer:
fredd [130]2 years ago
3 0

Answer:

78.5 i think

Step-by-step explanation:

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the vertex of this parabola is at (3,5). When the y-value is 6, the x-value is -1. What is the coefficient of the squared term i
otez555 [7]
Now, assuming is a vertical parabola, so the squared variable is the "x", let's do some checking.

\bf \qquad \textit{parabola vertex form}\\\\
\begin{array}{llll}
\boxed{y=a(x-{{ h}})^2+{{ k}}}\\\\
x=a(y-{{ k}})^2+{{ h}}
\end{array} \qquad\qquad  vertex\ ({{ h}},{{ k}})\\\\
-------------------------------\\\\
vertex
\begin{cases}
h=3\\
k=5
\end{cases}\implies y=a(x-3)^2+5
\\\\\\
\textit{we also know that }
\begin{cases}
y=6\\
x=-1
\end{cases}\implies 6=a(-1-3)^2+5
\\\\\\
1=a(-4)^2\implies 1=16a\implies \cfrac{1}{16}=a
6 0
3 years ago
What is the domain of f(x)=(1/2)^x
KIM [24]

Answer:

Domain: all real numbers

Step-by-step explanation:

The domain of a function is the set of values that x can be replaced with.

In this function, x can be replaced by any real number, so the domain of the function is all real numbers.

3 0
3 years ago
Read 2 more answers
1. How many two foot wide pieces of fencing are needed to surround the perimeter of a yard that is 18 feet long and 26 feet wide
Vesnalui [34]
44 peices are needed to surround the yard in fencing
5 0
3 years ago
Could someone explain the formula for this question?
pychu [463]

Answer:

Step-by-step explanation:

The modelled equation, P = 20n - 1200 is written in the slope intercept form. The slope of the line is 20. The line cuts the vertical axis at - 1200

a) the p intercept is - 1200(cost of production)

b) at the p intercept, the number,

n = 0. It means that no watches are sold. Therefore,

If the company sells 0 watches, it will lose $1200

c) the n intercept is the point where the line cuts the x axis.

At the n intercept, P = 0

0 = 20n - 1200

20n = 1200

n = 1200/20

n = 60

d) if the company sells 60 watches, it will lose $0

7 0
3 years ago
What is the answer to 4.9 = 0.7m
kolbaska11 [484]
4.9 = 0.7m            |(*10)
4.9 * 10 = 0.7m * 10
49 = 7m                |(:7)
49/7 = 7m/7
m = 7

6 0
3 years ago
Read 2 more answers
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