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3 years ago

HURRY I NEED THIS BEFORE 12

Mathematics

1 answer:

I am Lyosha [343]3 years ago

5 0

X=8 because add 11 to both sides and it becomes 28=3.5x and divide both sides by 3.5 so x=8

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A cylinder has diameter of 4ft and a height of 9ft. Explain whether halving the diameter has the same effect on the surface area

elena55 [62]

Answer:

See Below

Step-by-step explanation:

The surface area of cylinder is given by the formula:

$SA=2\pi r^2 + 2\pi r h$

Where

r is radius ( diameter is 4, so radius is 4/2 = 2)

h is height ( h = 9)

Lets find original surface are:

$SA=2\pi r^2 + 2\pi r h\\SA=2\pi (2)^2 + 2\pi (2) (9)\\SA=8\pi +36\pi\\SA=44\pi$

<u>Halving diameter:</u>

diameter would be 4/2 = 2, so radius would be 2/2 = 1

So, SA would be:

$SA=2\pi r^2 + 2\pi r h\\SA=2\pi (1)^2 + 2\pi (1) (9)\\SA=2\pi +18\pi\\SA=20\pi$

<u>Halving height:</u>

Height is 9, halving would make it 9/2 = 4.5

Now, calculating new SA:

$SA=2\pi r^2 + 2\pi r h\\SA=2\pi (2)^2 + 2\pi (2) (4.5)\\SA=8\pi + 18\pi\\SA= 26\pi$

Original SA is $44\pi$ ,

Halving diameter makes it $20\pi$

Halving height makes it $26\pi$

So, halving diameter does not have same effect as halving height.

5 0

3 years ago

PLS HELP ME W/ #8 ASAP

tiny-mole [99]

Answer:

x=2

TU:4(2)-1=7

UB: 3

TB: 10

Step-by-step explanation:

4x-1+2x-1=5x

6x-2=5x

6x=5x+2

subtract 5x from both sides

x=2

TU: (4x-1)

4(2)-1

8-1

TU:4(2)-1=7

UB: (2x-1)

2(2)-1

4-1

UB: 3

TB: 5(2)

TB: 10

7 0

3 years ago

Which of the following choices shows the complete factorization of 50?

finlep [7]

Answer:

prime factorization = 2

7 0

3 years ago

Read 2 more answers

Graph the function f(x)= 2x -4

galben [10]

The y intercept and -4 and going down 2 and 1 right u til you reach the end of the graph

7 0

2 years ago

I WILL GIVE OUT BRAINELIST Quadratic functions g(x) and h(x) are graphed on the same coordinate grid. The vertex of the graph of

Soloha48 [4]

Answer:

h(x)=(x-12)2 and g(x)=2

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3 years ago