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3 years ago

What’s the algebraic expression of ? Twice the sum of a number n and 2 ?

Mathematics

2 answers:

Mandarinka [93]3 years ago

5 0

Answer:

A is the answer. 2(n+2)

Kobotan [32]3 years ago

5 0

Answer:

Step-by-step explanation:

The sum of a number n and 2 is n + 2

Twice this sum is

2(n+ 2) → A

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You are an assistant director of the alumni association at a local university. You attend a presentation given by the university

NNADVOKAT [17]

Answer:

(0.102, -0.062)

Step-by-step explanation:

sample size in 2018 = n1 = 216

sample size in 2017 = n2 = 200

number of people who went for another degree in 2018 = x1 = 54

number of people who went for another degree in 2017 = x2 = 46

p1 = x1/n1 = 0.25

p2 = x2/n2 = 0.23

At 95% confidence level, z critical = 1.96

now we have to solve for the confidence interval =

$0.25 -0.23 ± 1.96*\sqrt{((1 - 0.25) * 0.25)/216 + ((1 - 0.23) *0.23/200}$

= 0.02 ± 1.96 * 0.042

= 0.02 + 0.082 = 0.102

= 0.02 - 0.082 = -0.062

There is 95% confidence that there is a difference that lies between - 0.062 and 0.102 on the proportion of students who continued their education in the years, 2017 and 2018.

There is no significant difference between the two.

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3 years ago

What is the answer to this in cm

jasenka [17]

The hardest part is finding the length of the curve at the top. To find arc length, multiply the circumference by the arc angle divided by full angle (360°) in a circle. Or:
$s = (2\pi r)( \frac{x}{360})$
x, the arc angle in a semicircle, is 180°.
r, the radius is 7/2 = 3.5.
Now just plug the numbers in and solve for arc length, s.

s = 2π(3.5)(1/2) ≈ 11.00

Now just add up all the sides. 11cm + 10cm + 10cm + 7cm = 38 cm.

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3 years ago

I need help with 12 questions because idk how to do it and it's on metric units of liquid volume someone help quick I need to go

insens350 [35]

Where is the picture for this question

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3 years ago

How can you use a coordinate plane to solve perimeter and area problems? Please help me

lana66690 [7]

Well, you can do
area=legnth times widht
perimiter=2(legnth+width)
then you just subsitute x for legnth and y for width then solve
area=xy
perimiter=2(x+y)
then graph and find the intersection to find the solution

6 0

3 years ago

Please help it is due today will give brainliest

stepladder [879]

Answer:

25/-10

Step-by-step explanation:

you plug -5 as b so -5x-5=25

and then plug -15 as a and add 5 so u get -10

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3 years ago