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spayn [35]
2 years ago
13

3. Askating rink charges a group fate of $9 plus a fee to rent each pair of skates. A family rents 7 pairs of skates and pays a

total of $30.
Each skate rental is $______​
Mathematics
2 answers:
brilliants [131]2 years ago
5 0

7x+9=30

7x=30-9

7x=21

x=21÷7

x=3

ddd [48]2 years ago
4 0

Answer:

  • $3

Step-by-step explanation:

Let the rental is x

<u>The total is, the equation:</u>

  • 7x + 9 = 30
  • 7x = 21
  • x = 3

Each skate rental is $3

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3 years ago
A bag of candy contains 300 pieces of which 28% are red. How many are not red?
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216
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If a triangle with angle measures 40,30.and 120 centimeters possible?
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If f(x)=sinx 2x 1 and g is the inverse function of f
Bingel [31]

The value of the derivative of the function g(x) at x = 1 will be 1/3. Then the correct option is A.

<h3>What is an inverse function?</h3>

A function that may convert into another function is known as an inverse function or anti-function.

If the function is f(x) = sinx + 2x + 1.

Then the derivative of an inverse function g(x) of a function f(x) at a given value (a) will be

\rm g'(a) = \dfrac{1}{f'(g(a))}

The derivative of f(x) will be

f'(x) = cos x + 2

Then the given value of a will be

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put x = 0, then we have

f(0) = sin 0 + 2(0) + 1

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Put x = 1, in the function f⁻¹(x). Then we have

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Then put a = 1, then we have

\rm g'(a) = \dfrac{1}{f'(g(a))}\\\\g'(1) = \dfrac{1}{f'(g(1))}\\\\g'(1) = \dfrac{1}{f'(0)}\\\\g'(1) = \dfrac{1}{\cos 0 + 2}\\\\g'(1) = \dfrac{1}{1+2}= \dfrac{1}{3}

More about the inverse function link is given below.

brainly.com/question/2541698

#SPJ4

8 0
1 year ago
a plumber charges an initial fee of $200 plus an hourly fee of $50. Mr.Collins paid the plumber $450. How many hours did the plu
Advocard [28]
The plumber worked for 5 hours because 450-200=250 which gets rid of the initial fee so 250 divided by 50 is 5
8 0
3 years ago
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