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3 years ago

Area of the cylinder

Mathematics

1 answer:

Tanzania [10]3 years ago

5 0

OK the way to solve this is by first using the formula.
A = 2 π r h + 2 π r²
the r stands for radius
the h stands for height
Next we have to put the r and the h in with the numbers
r = 5
h = 1
Next we have to solve the question and you should get the answer of
A ≈ 188.5

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How to determine if a function is even or odd calculus?

aalyn [17]

A function $f(x)$ is even if $f(-x)=f(x)$ , and is odd if $f(-x)=-f(x)$ .

Example:

$f(x)=x^2$ is even, since $f(-x)=(-x)^2=x^2=f(x)$ .

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2 years ago

Two angles are supplementary. The larger angle is

UkoKoshka [18]

Answer:

x = 165, y = 15

Step-by-step explanation:

1. Well, what does supplementary mean? - The angles add up to 180°.

2. Let's form an equation: x + y = 180°

3. Let's say x is the larger angle and y is the smaller angle.

4. Let's form another equation: x = 150 + y

5. Put the two equations next to each other:

x + y = 180

x = 150 + y

6. We know what x is equaled to, so let's plug it into the first equation!

150 + y + y = 180

150 + 2y = 180

-150 -150

2y = 30

y = 15

7. Now, we know what y is, let's find x!

x + 15 = 180

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x = 165

4 0

2 years ago

The general form of the equation of a circle is x2+y2−4x−8y−5=0.

valentina_108 [34]

Answer:

centre = (2, 4)

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

Given

x² + y² - 4x - 8y - 5 = 0

Rearrange the x/y terms together and add 5 to both sides

x² - 4x + y² - 8y = 5

Use the method of completing the square on both the x/y terms

add ( half the coefficient of the x/y terms )² to both sides

x² + 2(- 2)x + 4 + y² + 2(- 4)y + 16 = 5 + 4 + 16

(x - 2)² + (y - 4)² = 25 ← in standard form

with centre (2, 4) and r = $\sqrt{25}$ = 5

4 0

3 years ago

If (4,y) is a solution to x-2y = 6, what is the value of y?

frutty [35]

Answer:

(4, -1)

Step-by-step explanation:

(4, y) is a solution to x - 2y = 6.

Find the value of y:

$4-2y=6\\\\4-4-2y=6-4\\\\-2y=2\\\\\frac{-2y=2}{-2}\\\\\boxed{y=-1}$

The value of y is '-1'.

(4, -1) is a solution to the equation.

Hope this helps.

5 0

2 years ago

If sin= 7/25 what are the other primary trig ratios?

statuscvo [17]

Answer:

cos=24/25

tan=7/24

Step-by-step explanation:

sin=opposite/hypotenuse

therefore 7 is the opposite and 25 is the hypotenuse.

using pythagorean theorem we can find the adjacent. i.e hypotenuse squared= sum of adjacent squared and opposite squared.

h^2= a^2+ O^2

25 squared - 7 squared= 576

which is equal to 24 squared.

therefore adjacent=24

cos=adjacent/hypotenuse

cos=24/25

tan=opposite/adjacent

tan=7/24.

8 0

2 years ago

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