All categories

3 years ago

Volume & surface! May I please have help

Mathematics

1 answer:

Ludmilka [50]3 years ago

3 0

Answer:

Step-by-step explanation:

surface area of cylinder

=(area of base)×2 + (area of curved surface)

$=(\frac{20}{2} )^{2} \pi$ × 2 + $20\pi$ × 25

=2 × $\pi$ × $10^{2}$ + 2 × $\pi$ × 10 × 25

You might be interested in

A calculator is broken so that the only keys that still work are the $\sin$, $\cos$, $\tan$, $\cot$, $\arcsin$, $\arccos$, and $

miskamm [114]

What is this check the q again

7 0

3 years ago

What's the difference between

yanalaym [24]

<span>I cant stand brainly they removed my account i had ONE warning i hope you see this brainly shove a big one up there and remove this account too</span>

6 0

3 years ago

Convert the equation (y + 2) = –1/3(x – 4) to the point-slope form. Then fill in the blanks below to describe how to graph the e

alisha [4.7K]

The point-slope form of the equation of the line is:

(y - y1) = m (x - x1)

So, (y + 2) = - 1/3 (x - 4) in the point-slope form is:

[y - (-2) ] = (-1/3) [ x - 4 ]

You must, then realize that the line passes through the point (4,-2) and its slope is - 1 /3.

That slope, -1 / 3, means that the function is decresing (because the slope is negative), and it decreases one unit when x increases 3 units.

Now you can fill in the blanks in this way:

Plot the point (4, -2), move 1 unit down, and 3 units over to find the next point on the line.

7 0

3 years ago

Riddle #2

zheka24 [161]

Answer:

28416

Step-by-step explanation:

No digits can be repeated

"All my digits are factors of 24" This means that the possible digits are: 1, 2, 3, 4, 6, 8

"The digits in my thousands place equals the perimeter of a 2x2 array" That would be 8

"The digits in my ten thousand places is twice the value of the digits in the hundreds place, but half the value of the digits in the thousands place" That would be 4, which also means that the ten thousands place is 2

"The digits in my tens place equal the number of lines of symmetry in an isoceles triangle" There is only 1 lines of symmetry

This means that we have 2841(?)

Because this number is even and no digits can be repeated, the only possible digits from those available is 6

Therefore the number is 28416

3 0

3 years ago

Add and subtract and simplify the result. Specify the values that must be excluded from the domain.

sweet [91]

The simplified polynomial expression is given as follows:

(2x² + x + 6)/[(x + 5)(x - 8)]

The values x = -5 and x = 8 are excluded from the domain.

<h3>How to find the simplified polynomial expression?</h3>

When polynomial expressions involve addition or subtraction, we combine the like terms, for multiplication, we apply the distributive property, multiplying all terms, and for division, we apply the last common multiple.

For this problem, the expression is given by:

$\frac{5x^2 - 25x - 4}{x^2 - 3x - 40} + \frac{2}{x - 8} - \frac{3x}{x + 5}$

The factors are given as follows:

x² - 3x - 40, x - 8, x + 5.

The multiplication of the last two is given by:

(x - 8)(x + 5) = x² - 3x - 40.

Hence (x - 8)(x + 5) is the least common factor, and the equivalent expression is found as follows:

$\frac{5x^2 - 25x - 4}{x^2 - 3x - 40} + \frac{2}{x - 8} - \frac{3x}{x + 5} = \frac{5x^2 - 25x - 4 + 2(x + 5) - 3x(x - 8)}{(x - 8)(x + 5)}$

The numerator is simplified as follows:

5x² - 25x - 4 + 2(x + 5) - 3x(x - 8) = 5x² - 25x - 4 + 2x + 10 - 3x² + 24x = 2x² + x + 6.

The denominator is the lcm, hence the simplified expression is:

(2x² + x + 6)/[(x + 5)(x - 8)]

The values x = -5 and x = 8 are excluded from the domain, as a fraction cannot have a denominator of 0.

More can be learned about polynomial expressions at brainly.com/question/2833285

#SPJ1

5 0

1 year ago