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BigorU [14]
4 years ago
8

Help please with work

Mathematics
1 answer:
Dmitrij [34]4 years ago
4 0

Answer:

200.96 ft²

Step-by-step explanation:

The question is on surface area of a closed cylinder

Formulae= SA=2 ×pi× r² + 2×pi×r×h

Where pi=3.14

SA= 2×3.14×2² + 2×3.14×2×14

SA=25.12+175.84

SA=200.96 ft²

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In 50 item test nestor got 95% correctly. how many correct answers did he get​
nignag [31]

Answer: 47.5 or just 47

Step-by-step explanation: Well, to start, set up a ratio.

x / 50 = 95 / 100

95 * 50 is 4750

4750 / 100 is 47.5.

Now, it's asking how many questions he got correct. You can't get 47.5 questions correct, it should be a whole number. Now, I don't know how the rules work with that question, but it is like 47.

7 0
3 years ago
Which of the following is the product of the rational expressions shown
Crazy boy [7]

For this case we must find the product of the following expressions:

\frac {3x} {x + 1} * \frac {x} {x-7}

So:

\frac {3x ^ 2} {x ^ 2-7x + x-7} =\\\frac {3x ^ 2} {x ^ 2-6x-7}

So, we have to:

\frac {3x} {x + 1} * \frac {x} {x-7} = \frac {3x ^ 2} {x ^ 2-6x-7}

Answer:

\frac {3x ^ 2} {x ^ 2-6x-7}

Step-by-step explanation:

8 0
4 years ago
Read 2 more answers
The pyramid shown has a square base that is 18 inches on each side. It has a surface area of 864 square inches. What is the slan
disa [49]
The first step is to find the relationship between the square base and the surface area.

Surface area (SA) = area of the square (SS) + area of triangles.4(AT) 

Thus we can conclude area of triangles 4(AT) = SA - SS = 864 - (18*18)

4(AT) = 864 - 324 = 540

Each triangle = 540/4 = 135 square in.

An area of one triangle (AT)= (base* slant height)/2

The base = 18 in.

<span>slant height = 2(AT)/base = 2(135)/18 = 15</span>
3 0
4 years ago
15. True or False: Is x = 4 a solution to X + 51 = -9<br> True<br> False
lora16 [44]

Answer:

False

Step-by-step explanation:

if x=4 the answer would not be -9

x+51 would add up to 55

so it would be : 4+51=55

now if we wanted the answer to be -9 , x would have to be different

-60+51=-9

but in this case x is no -60, it's 4, so no this statement is false.

4 0
3 years ago
Read 2 more answers
I need to know how to find the slope of the line for #2
son4ous [18]
Slope formula : (y2 - y1) / (x2 - x1)
now pick 2 points on ur line...
(1,2)......x1 = 1 and y1 = 2
(3,0)......x2 = 3 and y2 = 0
now sub
slope = (0 - 2) / (3 - 1) = -2/2 = -1 <== ur slope is -1
3 0
3 years ago
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