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2 years ago

12

Which represents the inverse of the function f(x) = 4x?

1 answer:

vampirchik [111]2 years ago

8 0

Answer: $f^{-1}(x)=\frac{x}{4}$

Step-by-step explanation:

Let $f(y)=x$ .

$x=4y\\\\y=\frac{x}{4}\\\\\therefore f^{-1}(x)=\frac{x}{4}$

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M(2,5) is the midpoint of RS. The coordinates of S are (3,9). What are the coordinates of R?

kobusy [5.1K]

$\bf ~~~~~~~~~~~~\textit{middle point of 2 points } \\\\ R(\stackrel{x_1}{x}~,~\stackrel{y_1}{y})\qquad S(\stackrel{x_2}{3}~,~\stackrel{y_2}{9}) \qquad \left(\cfrac{ x_2 + x_1}{2}~~~ ,~~~ \cfrac{ y_2 + y_1}{2} \right) \\\\\\ \left( \cfrac{3+x}{2}~~,~~\cfrac{9+y}{2} \right)~~=~~\stackrel{M}{(2~,~5)}\implies \begin{cases} \cfrac{3+x}{2}=2\\[1em] 3+x=4\\ \boxed{x = 1}\\ \cline{1-1} \cfrac{9+y}{2}=5\\[1em] 9+y=10\\ \boxed{y=1} \end{cases}$

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3 years ago

What is 40 x 365 / 6

Semmy [17]

Answer:

1,4600

Step-by-step explanation:

5 0

3 years ago

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Write these numbers in standard form.

pychu [463]

Answer:

Here are the answers I got I hope this is correct!! :)

Step-by-step explanation:

A) 6 x 10^3

B) 4 x 10^8

C) 70 x 10^3

___________________________________________________________

I hope this helped you sorry for the first try c:

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3 years ago

What is 20% of 5000

Dimas [21]

Answer:

1000

Step-by-step explanation:

8 0

3 years ago

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Amanda is making pastry dough. She mixes of a 1/3cup of flour and of a 1/5 cup of sugar. If she wants to mix flour and sugar in

mr_godi [17]

Flour : sugar = (1/3) : (1/5) = 5 : 3 . . . . . . . . multiply the first ratio by 15 to eliminate fractions

The total of ratio units in the last representation is 5+3=8, so for a recipe of 16 cups, each ratio unit will stand for 16/8 = 2 cups.

Multiplying the ratio by 2 cups, we find Amanda will need

... 10 cups flour : 6 cups sugar

for her recipe.

4 0

3 years ago

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