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3 years ago

PLEASE ANSWER!!! WILL MARK BRAINLIEST :D

Mathematics

2 answers:

Gala2k [10]3 years ago

7 0

Answer:

Alina had at the beginning $\frac{10}{3}c$ cookies

Step-by-step explanation:

we know that

c-----> represent 30% of all the cookies Alina had

Let

x-----> the 100% of all the cookies Alina had

by proportion

$\frac{c}{30\%} =\frac{x}{100\%}\\ \\x=100*c/30\\ \\x=\frac{10}{3}c$

Dmitry [639]3 years ago

7 0

Answer: 3 1/3 c

Step-by-step explanation: We know that Aliana ate 30%.

Let's put it this way. Say there were 10 cookies. She would've ate 3 since it is 30%.

We need to divide 10 by 3, therefore saying that the answer is 3 1/3 c

Do not forget to label with c.

Hope this helps. ;D

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NO LINKS OR FILES i WILL GIVE BRAINLIEST TO WHOEVER DOES IT CORRECTLY WITH NO LINKS OR FILES

katovenus [111]

I believe it would be 10%

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3 years ago

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4TH TIME ASKING THIS!!! Please help me! Someone pleaseeee. I need the correct answers. I don’t want to fail

Alexeev081 [22]

Answer:

The functions are inverses; f(g(x)) = x ⇒ answer D

$h^{-1}(x)=\sqrt{\frac{x+1}{3}}$ ⇒ answer D

Step-by-step explanation:

* Lets explain how to find the inverse of a function

- Let f(x) = y

- Exchange x and y

- Solve to find the new y

- The new y = $f^{-1}(x)$

* Lets use these steps to solve the problems

∵ $f(x)=\sqrt{x-3}$

∵ f(x) = y

∴ $y=\sqrt{x-3}$

- Exchange x and y

∴ $x=\sqrt{y-3}$

- Square the two sides

∴ x² = y - 3

- Add 3 to both sides

∴ x² + 3 = y

- Change y by $f^{-1}(x)$

∴ $f^{-1}(x)=x^{2}+3$

∵ g(x) = x² + 3

∴ $f^{-1}(x)=g(x)$

∴ The functions are inverses to each other

* Now lets find f(g(x))

- To find f(g(x)) substitute x in f(x) by g(x)

∵ $f(x)=\sqrt{x-3}$

∵ g(x) = x² + 3

∴ $f(g(x))=\sqrt{(x^{2}+3)-3}=\sqrt{x^{2}+3-3}=\sqrt{x^{2}}=x$

∴ f(g(x)) = x

∴ The functions are inverses; f(g(x)) = x

* Lets find the inverse of h(x)

∵ h(x) = 3x² - 1 where x ≥ 0

- Let h(x) = y

∴ y = 3x² - 1

- Exchange x and y

∴ x = 3y² - 1

- Add 1 to both sides

∴ x + 1 = 3y²

- Divide both sides by 3

∴ $\frac{x + 1}{3}=y^{2}$

- Take √ for both sides

∴ ± $\sqrt{\frac{x+1}{3}}=y$

∵ x ≥ 0

∴ We will chose the positive value of the square root

∴ $\sqrt{\frac{x+1}{3}}=y$

- replace y by $h^{-1}(x)$

∴ $h^{-1}(x)=\sqrt{\frac{x+1}{3}}$

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3 years ago

120 meals to 52 meals

Brrunno [24]

Do you want a ratio? If yes, the ratio is 120:52

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3 years ago

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EleoNora [17]

Answer:

Step-by-step explanation:

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4.3 inches * 30km= 129 km

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2 years ago

Please help thank you

ioda

Tan65°=h/75m

2.1445 × 75 = h

h = 160.83

Step-by-step explanation:

This is very very simple

6 0

2 years ago