3 years ago

GIVING BRAINLIEST PLS HELP :(

Mathematics

1 answer:

Kryger [21]3 years ago

4 0

Answer:

d) not proportional

Step-by-step explanation:

the rate of change between the first two pairs of x-and-y values is 12/3, between the second pair it is 21/3, and 15/3 between the last pair

4, 7, and 5 are all different values so there is not one constant of proportionality

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Values of an expression

REY [17]

Substitute a number for each variable

Ex.
2x x=5
(2)(5)
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4 years ago

Write the inverse function for the function, ƒ(x) =1/2x + 4. Then, find the value of ƒ^ -1(4). Type your answers in the box.

Kipish [7]

Answer:

f⁻¹(x) = 2x - 8

f⁻¹(4) = 2 × 4 - 8

f⁻¹(4) = 0

Step-by-step explanation:

$f(x) = \frac{1}{2} x + 4\\x = \frac{1}{2} f^{-1}(x) + 4\\x - 4 = \frac{1}{2} f^{-1}(x)\\2x - 8 = f^{-1}(x)\\f^{-1}(x) = 2x - 8$

Let's test it

$f^{-1}(f(x)) = 2(f(x)) - 8\\f^{-1}(f(x)) = 2( \frac{1}{2}x + 4) - 8\\f^{-1}(f(x)) = \frac{2}{2}x + 8 - 8\\f^{-1}(f(x)) = x$

So we do indeed have the inverse function, so using that we can plug in the values requested:

f⁻¹(x) = 2x - 8

f⁻¹(4) = 2 × 4 - 8

f⁻¹(4) = 0

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ankoles [38]

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a_sh-v [17]

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At the nearest wholesale store, 3 bags of bulk cereal cost $21.75. At this rate, how much would 5 bags of bulk cereal cost?

sertanlavr [38]

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Hope this helped!

Step-by-step explanation:

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3 years ago

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