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Minchanka [31]
3 years ago
5

A Jar contains n nickels and d dimes. There are 22 coins in the jar, and the total value of the coins is $1.55.

Mathematics
1 answer:
kotegsom [21]3 years ago
4 0
They is 9dime and 13 Nickels because 13 x5=65 and 9 x10=90 .So 0.65+ 0.90= 1.55.
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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

4 0
3 years ago
Can someone help please
Alik [6]

Answer:

6

Step-by-step explanation:

base + 2(legs) = 56  (2 legs are the same because it's isosceles)

x + 2(5x - 5) = 56

x + 10x - 10 = 56

11x -10 = 56

11x = 66

x = 6

5 0
2 years ago
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castortr0y [4]

Answer:

9

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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Answer:

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Step-by-step explanation:

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you can turn this into 1/50 ❌

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you can turn this into 3/10 ✔️

hope this helps! have a nice day! :)

5 0
2 years ago
I need this done in 15 mins pls help
Elza [17]

Answer:  35, 31, 25, 18

Step-by-step explanation:

8 0
2 years ago
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