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timama [110]
3 years ago
15

Helen made a graph that represents the amount of money she earns, y, for the numbers of hours she works , x. the graph is a stra

ight line that passes through the origin and the point (1, 12.5)
which statement is true
a) the slope of the graph is 1
b) Helen earns 12.50 per hour
c) Helen works 12.5 hours per day
d) the y-intercept of graph is 12.5
Mathematics
1 answer:
MrRa [10]3 years ago
5 0
It is b because x=1&y=12.5 x also= hours and y=money. Therefore she gets $12.50 each hour
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What is -2 sqrt 50 - sqrt 125 in simplest radical form
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Answer:

- 10√2 - 5√5

Step-by-step explanation:

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Afina-wow [57]

Answer:

z=14.73

p=0.000

for 99% confidence level the null hypothesis is rejected, thus majority of us adults would not bothered if the NSA collected personal records.

Step-by-step explanation:

H_{0}: Half of US adults would not bothered if the NSA collect records of personal telephone calls

H_{A}: Majority of the adults would not bothered if the NSA collect records of personal telephone calls

According to the sample, z-value can be found using the formula:

z=\frac{X-M}{\sqrt{n*p*(1-p)} } where

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  • M is the mean of the distribution of null hypothesis (257)
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Putting these numbers in the formula,

z=14.73  and corresponding p value is p≈0.000

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Part I: Measuring Parts of a Circle
cluponka [151]

Answer:

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case b) The approximate circumference of circle is 6\ units and the ratio of circumference to Diameter is \frac{C}{D}=3

case c) The approximate circumference of circle is 6.24\ units and the ratio of circumference to Diameter is \frac{C}{D}=3.12

Step-by-step explanation:

we know that

The approximate circumference of each circle, is equal to the perimeter of each inscribed polygon

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step 1

Find the approximate circumference of circle

The perimeter of the pentagon is equal to

P=5s

where

s=1.18\ units

substitute

P=5(1.18)=5.9\ units

therefore

The approximate circumference of circle is 5.9\ units

step 2

Find the ratio of circumference to Diameter

we know that

The radius is half the diameter so

D=2r=2(1)=2\ units

The ratio is equal to

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case B) the figure is an inscribed hexagon

step 1

Find the approximate circumference of circle

The perimeter of the hexagon is equal to

P=6s

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s=1\ units

substitute

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step 2

Find the ratio of circumference to Diameter

we know that

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The ratio is equal to

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The perimeter of the dodecahedron is equal to

P=12s

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s=0.52\ units

substitute

P=12(0.52)=6.24\ units

therefore

The approximate circumference of circle is 6.24\ units

step 2

Find the ratio of circumference to Diameter

we know that

The radius is half the diameter so

D=2r=2(1)=2\ units

The ratio is equal to

\frac{C}{D}=6.24/2=3.12

<em>Conclusion</em>

We  know that

The exact value of the ratio \frac{C}{D} is equal to

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