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rusak2 [61]
3 years ago
10

If f(×)=16×-30 and g(×)=14×-6, for which value of x does (f-g)(x)=0

Mathematics
1 answer:
Dafna1 [17]3 years ago
7 0

Answer: x=12

Step-by-step explanation:

f(x)=16x-30\\g(x)=14x-6  are the equations that you've given us.

Now if we plot these two equations on the graph we notice there's an intersection at (12,162). Therefore meaning that x=12.

We can prove that by doing the following calculations to prove that both sides are equal to each other.

<em>The left side of the equal sign</em>:

Step 1: Write the equation down:

16x-30

Step 2: Substitute x for the numerical value we found.

16(12)-30

Step 3: We will multiply 16*20 first, giving us 192.

192-30

Step 4: Subtract 192 from 30. Which gives us 162.

162

<em>The right side of the equal sign</em>:

Step 1: Write the equation down:

14x-6

Step 2: Substitute x for the numerical value we found.

14(12)-6

Step 3: We will multiply 14*12 first, giving us 168.

168-6

Step 4: Subtract 168 from 6. Which gives us 162.

162

We know that x=12 because when substituting x with 12, we get 162 on both sides. Therefore making this statement <u>true and valid</u>.

162=162

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