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TiliK225 [7]
3 years ago
13

Q-The circumference of the circle is also sometimes called:​

Mathematics
1 answer:
Lelu [443]3 years ago
3 0
Perimeter or diameter
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What is an equation of the line containing the points (-1,5) and (3,9)​
Lady bird [3.3K]

Answer:

  y = x+6

Step-by-step explanation:

You can find an equation by using the 2-point form of the equation for a line:

  y = (y2 -y1)/(x2 -x1)·(x -x1) +y1

Filling in the given values, we have ...

  y = (9 -5)/(3 -(-1))·(x -(-1)) +5

  y = (4/4)(x +1) +5 . . . . simplifying a bit

  y = x +6

3 0
3 years ago
I just need help with 15
Iteru [2.4K]

Answer:

The answer is survey five randomly selected students from every homeroom

Step-by-step explanation:

hope it helps

4 0
3 years ago
What's the number when the quotient of a number and -7 decreased by 2 is 10?
dsp73
Let's read through this and make an equation:
? ("number")
? / -7 ("quotient of a number and -7")
(? / -7) - 2 ("decreased by 2")
<span>(? / -7) - 2 = 10 ("is 10")
</span>
Now we can solve:
<span>(? / -7) - 2 = 10
</span><span>? / -7 = 12
</span>? = -84

The number is -84
3 0
3 years ago
Find the Area of the figure below, composed of a rectangle and a semicircle. Round to the nearest tenths place.
DIA [1.3K]

Answer:

129.13

Step-by-step explanation:

Triangle:

8 × 13 = 104

Semi-circle:

3.14(4²) ÷ 2 = 25.1327

25.13 + 104 = 129.13

<em>good luck, i hope this helps :)</em>

6 0
3 years ago
Read 2 more answers
PLEASE HELP!
Aleks04 [339]

Answer:

Option c:

0.25 \pm 1.645\sqrt{\frac{0.25*(1-0.25)}{90}}

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

For this problem, we have that:

You have access to first year enrolment records and you decide to randomly sample 119 of those records. You find that 89 of those sampled went on to complete their degree. This means that n = 119, \pi = \frac{89}{119} = 0.7478.

90% confidence level

So \alpha = 0.1, z is the value of Z that has a p-value of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

Sample of 90 people with a sample proportion of 0.25

This means that n = 90, p = 0.25.

Confidence interval:

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

0.25 \pm 1.645\sqrt{\frac{0.25*(1-0.25)}{90}}

Which is option c.

6 0
3 years ago
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