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2 years ago

How to get the answer for2x-12y=7,x=6y+9 substitution method

Mathematics

1 answer:

beks73 [17]2 years ago

7 0

Answer:

step 1. you see in the problem x = 6y + 9 substitue the equation for the x variable in the first equation. so it will be 2(6y+9) - 12y = 7

step 2. solve for y. butttt in this case it looks like it can't be solved .

Step-by-step explanation:

option 3. in the steps i provided substituted x for x equals 6y + 9 which leads you to solve y. if you want you can rearrange 2x-12y=7 to solve for y so it would be 7-2x/-12 = 7

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2 years ago

The average rate of change of g(x) between x = 4 and x = 7 is 5/6 . Which statement must be true?

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Answer:

$\frac{5}{6}=\:\frac{g\left(7\right)-g\left(4\right)}{7-4}$ would be the correct statement.

Step-by-step explanation:

As we know that

Average rate of change = Change in output / Change in input

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As the average rate of change of g(x) between x = 4 and x = 7 is 5/6.

$\:Average\:rate\:of\:change\:=\:\frac{g\left(7\right)-g\left(4\right)}{7-4}$

$\frac{5}{6}=\:\frac{g\left(7\right)-g\left(4\right)}{7-4}$

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3 years ago

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Answer:

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Step-by-step explanation:

STEP 1: Replace all occurrences of $y$ with $-3x+7$ in each equation.

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