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tensa zangetsu [6.8K]
3 years ago
11

If f(x + 2) = 6x2 + 5x − 8. Find f(6).

Mathematics
1 answer:
Blababa [14]3 years ago
6 0

Answer:

  108

Step-by-step explanation:

We can rewrite f(x+2) to make it easier to evaluate:

  f(x+2) = (6x +5)x -8

Since we want f(6), we want x+2 = 6, or x=4.

  f(6) = (6·4 +5)·4 -8 = 29·4 -8

  f(6) = 108

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A box contains 76 coins, only dimes and nickels. The amount in the box is $4.90. How many dimes and how many nickels are in the
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The number of dimes is 75 coins.

The number of nickels is 1 coin.

<u>Step-by-step explanation:</u>

It is given that,

A box contains 76 coins, only dimes and nickels.

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  • Let, the number of dimes be x.
  • The 5 cent coin is called a nickel.
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<u>This is represented by the system of equations :</u>

x + y = 76  -------(1)

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Multiply eq (1) by 5 and subtract eq (2) from eq (1),

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x = 375/5

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The number of dimes is 75 coins.

Substitute x=75 in eq (1),

y = 76 - 75

y = 1 coin.

The number of nickels is 1 coin.

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the length of a rectangle is 8 less than twice the width. the perimeter is 38 feet. Find the length and width. someone please he
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Step-by-step explanation:

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