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3 years ago

Function (f) is defined by the equation f(x)=3x-7. Find the value of c so that f(c) =20 is true.

Mathematics

1 answer:

9966 [12]3 years ago

4 0

Answer:

c = 9

Step-by-step explanation:

Given f(x) = 3x - 7 , then

f(c) = 3c - 7 = 20 ( add 7 to both sides )

3c = 27 ( divide both sides by 3 )

c = 9

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4 years ago

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3 years ago

A laptop computer is purchased for $1500 after each year the resale value decreases by 25% what will the resale value be after t

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Answer:

The resale value after three years = $ 632.8125‬

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3 0

3 years ago

A club has 25 members. How many ways are there to choose four members of the club to serve on the executive committee? How many

Contact [7]

Answer:

303600 ways

Step-by-step explanation:

No. of members = 25

We are supposed to find the no. of ways to choose a president, vice-president, secretary, and treasurer of the club

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The order matters here since each member will get different posts .

So, we will use permutation over here

Formula: $^nP_r=\frac{n!}{(n-r)!}$

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r = 4

$^{25}P_4=\frac{25!}{(25-4)!}$

$^{25}P_4=303600$

Hence there are 303600 ways to choose a president, vice-president, secretary, and treasurer of the club

4 0

3 years ago