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Vera_Pavlovna [14]
3 years ago
15

-7(2 + 2x) = -84 pls try and show work

Mathematics
1 answer:
Hoochie [10]3 years ago
8 0

Answer:

The final answer is \bold{x = 5}.

Step-by-step explanation:

Hey there! We will solve this using the distributive property.

  • The distributive property states that when we are given a(b \pm c), we can "distribute" the <em>a</em> through the parentheses and therefore multiply together <em>a</em> & <em>b</em> as well as <em>a</em> & <em>c</em>.
  • This would end up giving us an equation such as (a \times b \pm b \times c).
  • After we get this, we can simplify it as a one-step, two-step, or multi-step equation.

Now, we can apply these methods and solve for x in the equation!

\text{-7(2 + 2x) =  -84 \ \ This is where we begin distributing.}\\\\\text{To distribute, we will multiply the -7 by 2, and the - 7 by 2x.}\\\\\text{Be sure to keep the original operator in the parentheses!}\\\\\text{-14 - 14x = -84 \ \ Now, simplify the equation as a two-step equation.}\\\\\text{-14x = -70 \ \ Now, we have to divide by -14 on both sides to get x by itself.}\\\\\text{x = 5 \ \ And, now, we have our final answer!}

And there we go! We found that the final answer is 5. Hope this helps!

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ZanzabumX [31]

a. θ = 36. 9°

b. θ = 114. 2°

<h3>How to determine the value of theta</h3>

a. We use the cosine identity

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Now, we have the inverse of the cosine value

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1 year ago
Given two linear equations: y=3x+3 and y=-3x-5. Select all or one that apply.
sergejj [24]

Answer:

D

Step-by-step explanation:

We have the two linear equations:

\text{ Line 1: }y=3x+3

\text{ Line 2: }y=-3x-5

And we want to determine the relationship between them.

Let's go through each of the answer choices.

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The slope of Line 1 is 3, while the slope is Line 2 is -3.

Since they have different slopes, they are not parallel.

Perpendicular?

Perpendicular lines have slopes who are negative reciprocals of each other.

For example, the negative reciprocal of 2 will be -1/2. And the negative reciprocal of -1/2 is 2.

The slope of Line 1 is 3. The negative reciprocal of 3 is -1/3. This is <em>not</em> the slope of Line 2.

We can do it for Line 2 just to confirm. The slope of Line 2 is -3. The negative reciprocal of -3 is 1/3.

So, because their slopes are not negative reciprocals of each other, the two lines are not congruent.

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4 years ago
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Tcecarenko [31]

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Step-by-step explanation:

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3 years ago
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aliya0001 [1]
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