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ruslelena [56]
3 years ago
8

Evaluate n²+5 when n=3

Mathematics
1 answer:
kondor19780726 [428]3 years ago
5 0

Answer:

14

Step-by-step explanation:

When you sqaure a number you multiply it by itself once so it would be (3x3) + 5. Rmemeber PEMDAS, so you multiply 3x3 first to get 9 and then you add 5 to get 14.

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B. Simplify: 3(x+2) = 4x ( +2 points)
olya-2409 [2.1K]

Answer:

6

Step-by-step explanation:

3(x+2) = 4x

3x + 6 = 4x  <- you times the x and 2 that is inside of the parentheses by the 3 that is on the outside

3x - 3x + 6 = 4x - 3x  <- you have to subtract the 3x from the left side and you have to do the same on the right so you can get the numbers alone.

6 = x

7 0
3 years ago
Read 2 more answers
Divide 2x^4+3x^3-5x+6 by x^2+3x-2 .
Anni [7]

2x^4 + 3x^3 - 5x + 6  ÷ x^2 + 3x - 2

= 2x^6 + 3x^5 − 2x^3 − 2x^2 + 6/ x^2

4 0
3 years ago
Gabby wants to buy a desk. The orignal price is $72. What is the sale price
Verdich [7]

Answer:

25% of $72 = 18

sale price = $72 -$18 =$54

hope that helped

if yes give me brainliest and if no draw my attention by hitting the comment section

8 0
3 years ago
The arc made by a sector at center is 72 degrees . Given that the length of an arc is 44cm ,calculate the radius of the circle (
lesantik [10]

Given:

Central angle of a sector = 72 degrees

Intercepted arc length = 44 cm

To find:

The radius of the circle.

Solution:

We know that, the arc length is

s=2pi r\dfrac{\theta }{360^\circ}

Where, r is the radius of the circle, \theta is the central angle in degrees.

Putting s=44,\pi=3.14 and \theta = 72^\circ, we get

44=2(3.14)r\dfrac{72^\circ }{360^\circ}

44=6.28r(0.2)

44=1.256r

Divide both sides by 1.256.

\dfrac{44}{1.256}=r

35.031847=r

r=35.03

Therefore, the radius of the circle is about 35.03 cm.

3 0
3 years ago
What is the difference between 20 and -10?​
7nadin3 [17]
The answer is 30. Hope that helps
3 0
4 years ago
Read 2 more answers
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