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Amanda [17]
3 years ago
5

How to find the surface area of a figure with 7 an 21

Mathematics
1 answer:
Aleks [24]3 years ago
4 0
SA=2(3.14)(7)squared
SA=2(3.14)(49)
SA=307.72

V=(3.14)(7squared)(21)
V=(3.14)(49)(21)
V=3231.06
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6 0
4 years ago
Read 2 more answers
Wowie there’s a lot of these
alexandr1967 [171]

Answer:

the answer is: B- 6 and 19

Step-by-step explanation:

The reason its b is because, the lowest point is at 6 and the highest point is between 18 and 20, in other words 19.

5 0
3 years ago
Plz I can’t do this
zheka24 [161]

Answer: f(g(x))=x and g(f(x)) = x

              f⁻¹(x) = g(x) YES ARE INVERSES

              f⁻¹(x) ≠ g(x) NOT INVERSES

<u>Step-by-step explanation:</u>

Inverse is when you swap the x's and y's and then solve for y.

If f⁻¹(x) = g(x), then they are inverses of each other.

Similarly, if g⁻¹(x) = f(x), they are inverses of each other.

<em>NOTE: You can also use composition to determine if they are inverses  -->    If (fog)(x) = x, then they are inverses of each other.</em>

f(x) = \dfrac{1}{x+4}-9\\\\\\\text{Swap the x's and y's. NOTE: f(x) is y}\\x=\dfrac{1}{y+4}-9\\\\\\\text{Add 9 to both sides}\\x+9=\dfrac{1}{y+4}\\\\\\\text{Flip the fractions}\\\dfrac{1}{x+9}=y+4\\\\\\\text{Subtract 4 from both sides}\\\dfrac{1}{x+9}-4=y\\\\\\\boxed{f^{-1}(x)=g(x)\text{ so f(x) and g(x) are inverses of each other}}

f(x) = 3x+27\\\\\\\text{Swap the x's and y's NOTE f(x) is y}\\x=3y+27\\\\\\\text{Subtract 27 from both sides}\\x-27=3y\\\\\\\text{Divide everything by 3}\\\dfrac{1}{3}x-\dfrac{27}{3}=y\\\\\\\text{Simplify}\\\dfrac{1}{3}x-9=y\\\\\\\boxed{f^{-1}(x)\neq g(x)\text{ so f(x) and g(x) are NOT inverses of each other}}

7 0
3 years ago
Need help on this loviesss
aev [14]

Step-by-step explanation:

perimeter of triangle = s + s + s

perimeter of given triangle = 22 + 17 + 14

                                             = 53 cm

therefore, perimeter of given triangle is <em>53 cm</em>

7 0
4 years ago
PLEASE HELP WILL GIVE GOOD RATINGS AND 15 POINTS!! I will give BRAINLIEST
insens350 [35]

Answer:Really koltan

-Eliezer Ludan

Step-by-step explanation:

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4 years ago
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