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3 years ago

HELP PLZ!!! this is a very difficult question

Mathematics

1 answer:

antoniya [11.8K]3 years ago

6 0

Answer:

251.2 cm²

Step-by-step explanation:

Area of cylinder=2πrh+2πr^2

which is also=2πr(r+h)

applying formula

area=251.2 cm²

hope this helps plzz mark me brainliest

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Rewrite the expression by using symbols 7(x - 20)

Lelechka [254]

7 × x - 7 × 20

You could rewrite it this way, 7 x (x-20), but the answer above is better 'cause it takes away the grouping symbols

5 0

3 years ago

Given that f(x)= 2x+1 and g(x)= x^2 +2x+1 find (F+g)(2). Find (F.g)(x) find f(x)/g find f(2) +g(-2)?

Pepsi [2]

Answer:

$(f+g)(2) = 14$

$f(g(x)) = 2x^2 + 4x +3$

$\frac{f(x)}{g(x)} = \frac{2x+1}{x^2+2x+1}$

$f(2) + g(-2) = 6$

Step-by-step explanation:

Function composition and transformation combines functions together using operations such as addition, subtraction, multiplication, division and substitution. To find each, perform the operation with the functions f(x) = 2x+1 and $g(x) = x^2 + 2x +1$ .

(f+g)(x) is the functions f and g added together with 2 substituted for x.

$(f+g)(x) = 2x+1 + x^2 +2x + 1 = x^2 + 4x + 2\\(f+g)(2) = 2^2 + 4(2) + 2 = 14$

(f·g)(x) is function composition that means f(g(x)) or substitute g(x) into f(x).

$f(g(x)) = 2(x^2+2x+1)+1 = 2x^2 + 4x+2 + 1\\f(g(x)) = 2x^2 + 4x +3$

f(x) / g(x) is division of the two functions. Division can only occur with polynomials if they share the same factors or things which multiply to create them. If none are present, do not simplify.

$\frac{f(x)}{g(x)} = \frac{2x+1}{x^2+2x+1}$

This cannot be simplified.

f(2) + g(-2) means find the function value of f at 2 and the function value of g at -2 then add them together.

$f(2)+g(-2) = 2(2)+1 + ((-2)^2+2(-2) + 1)\\f(2) + g(-2) = 5 + (4-4+1)\\f(2) + g(-2) = 5 +1 = 6$

7 0

3 years ago

Read 2 more answers

In a high school, 7% of the students play the piano. This is 21 students. Choose the expressions that complete each step involve

Gnesinka [82]

Hello,

Set up a proportion :

7 → 21

100 → ?

Cross multiply :

100 * 21 / 7 = 300 students

Bye :)

7 0

3 years ago

What is the slope of a line parallel to y = 4/3x-2

den301095 [7]

I'm not that sure but I want to help

Step-by-step explanation:

y=4/3×-2

y=2/3×

Divide 2/3×

4 0

3 years ago

Write an equivalent expression for the expression shown below: a/3 + a/3 + a/3

iris [78.8K]

Answer:

3 (a/3) = a

Step-by-step explanation:

a/3 + a/3 + a/3

3 times a/3

the 3's cancel each other out

Keep up the good work! =)

3 0

4 years ago