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3 years ago

Solve for x: -3(x+7)=5 . Explain how you solved for x and how you know your answer is correct

Mathematics

1 answer:

pickupchik [31]3 years ago

6 0

Answer:

Step-by-step explanation:

-3(x+7)=5

1. Multiply 3 and x+7 , you will get -3x-21=5

2. Add 21 on both sides, you will be left with -3x=26

3. Divide both sides with -3, and x will equal to -26/3

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<h2>Writing an linear equation from a given scenario</h2>

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<em>Please refer to my answer from this question to know more about writing a </em><em>linear</em><em> </em><em>equation</em><em> from a given scenario: </em><em><u>brainly.com/question/24599307</u></em>

Scenario: A submarine dives $70$ feet per minute.

We let $f$ , be the position of the submarine from sea level as a function of $t$ , the time (in minutes) since the submarine dived.

The given scenario states that for every minute, the position of the submarine <u>decreases</u> (because the submarine is going in a downward direction) by $70$ feet. So $f(t)$ can be defined as $-70t$ .

Now we can select two points for the graph. We can select points $(1, f(1))$ and $(2, f(2))$ .

Evaluation of function:

$f(1) = -70(1) \\ f(1) = -70$

$f(2) = -70(2) \\ f(2) = -140$

Our points are $(1, -70)$ and $(2, -140)$

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3 years ago

Solve for x: -3(x+7)=5 . Explain how you solved for x and how you know your answer is correct​

Solve for x: -3(x+7)=5 . Explain how you solved for x and how you know your answer is correct