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morpeh [17]
3 years ago
5

.

Mathematics
2 answers:
sertanlavr [38]3 years ago
6 0

Simplify: -8(13 – 5c + 12d)

= −8 (13−5c+12d)

= (−8×13) + (−5c×−8) + (−8×12d)

= - 104 + 40c - 96d

Correct option is D

▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪▪

<h3>Answered by:-</h3><h2>Cutest Ghost (・◡・)</h2>

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guajiro [1.7K]3 years ago
3 0

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

Simplification ~

  • - 8(13 - 5c + 12d)

  • ( - 8 \times 13) + ( - 5c \times  - 8) + ( - 8 \times 12d)

  • -  104 + 40c - 96d

Correct choice is D

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Find the sum of the measures of the interior angles in the figure.
Schach [20]

Answer:

128.57 degrees per angle

Step-by-step explanation:

There is a total of 900 degrees in a seven sided polygon. Divide the number by seven and you get your answer.

8 0
4 years ago
3. university dean of students wishes to estimate the average number of hours students spend doing homework per week. The standa
gregori [183]

Answer:

A sample of 17 must be selected.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.96}{2} = 0.02

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.02 = 0.98, so Z = 2.054.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

The standard deviation from a previous study is 4 hours.

This means that \sigma = 4

How large a sample must be selected if he wants to be 96% confident of finding whether the true mean differs from the sample mean by 2 hours?

A sample of n is required.

n is found for M = 2. So

M = z\frac{\sigma}{\sqrt{n}}

2 = 2.054\frac{4}{\sqrt{n}}

2\sqrt{n} = 2.054*4

Simplifying both sides by 2:

\sqrt{n} = 2.054*2

(\sqrt{n})^2 = (2.054*2)^2

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Rounding up:

A sample of 17 must be selected.

8 0
3 years ago
Plz answer this for x
nirvana33 [79]
HEY THERE !!

AS WE KNOW A HEXAGON'S ALL ANGLES ARE 720°

SO HERE X = 720° - all rest angle's add

or 160+75+132+113+108= 588
x = 720 - 588
x = 132 °

HOPE IT HELPED YOU
4 0
4 years ago
Three times the difference of a number and 9 is -3. Find the number
leva [86]
3(x-9)=-3
3x-27=-3
3x=24
X=8

Check: 3(8-9)=-3

So your number is 8
4 0
3 years ago
A cookie recipe calls for 3 cups of sugar and yields 24 cookies how much sugar will be needed to make 3 dozen cookies
Sindrei [870]

Answer:4.5 cups of sugar

Step-by-step explanation:

Okay so 24 cookies is 2 dozen

1 cup of sugar would be used for every 8 cookies

3 dozen is equal to 36 cookies

36/8=4.5 so you would need 4.5 cups of sugar

5 0
3 years ago
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