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3 years ago

3x2 – 18x + 225 = 6 What’s the answer

Mathematics

1 answer:

posledela3 years ago

6 0

Answer:

12.5

Step-by-step explanation:

1) Original equation: 3(2) - 18x +225 = 6

2) Simplify: 6 - 18x + 225 = 6

3) Move 18x over to the right: 6 + 225 = 6 + 18x

4) Move the 6 on the right over to the left: 225 = 18x

5) Divide both sides by 18 to isolate x: 225/18, 18x/18

6) x = 12.5

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3 years ago

2. Given f(x) = 6(8 - x)+5

son4ous [18]

Answer:

a) Find the value of the function when x = -2

b) we get f(-2)=65

Step-by-step explanation:

We are given the function f(x)=6(8-x)+5

a) What does the notation f(-2) mean?

The notation f(-2) means that we have to put x = -2 in the given function of f(x) and find the value of the function when x = -2

b) What is the value of f(-2) ?

We need to find the value of f(-2)

$f(x)=6(8-x)+5$

Put x = -2

$f(-2)=6(8-(-2))+5\\f(-2)=6(8+2)+5\\f(-2)=6(10)+5\\f(-2)=60+5\\f(-2)=65$

So, we get f(-2)=65

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