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vodomira [7]
3 years ago
9

This is so confusing

Mathematics
2 answers:
Nesterboy [21]3 years ago
8 0

Step-by-step explanation:

d-7=<u>4</u><u>d</u><u>+</u><u>3</u>

<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u>e

e(d-7)=4d+3

de-7e=4d+3

ed-4d=3+7e

d(e-4)=3+7e

d=<u>3</u><u>+</u><u>7</u><u>e</u>

<u> </u><u> </u><u> </u><u> </u><u> </u><u>(</u>e-4)

hope it helps.

shutvik [7]3 years ago
4 0

Answer:

first one should be:

ed-4d

then the one in the brackets should be:

e-4

the final answer should be

e-4

the full question is the picture

Step-by-step explanation:

ed-7e=4d+3

ed-4d=3+7e

d(e-4)=3+7e

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Given that ∠ABD = 71°, which equation could be used to solve problems involving the relationships between ∠DBC and ∠ABC?
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Step-by-step explanation:

one could be that all the angles add up to 180

180-71= 109

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Describe the graph of a system of equations that has no solution.
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<span>The solution for a system of equations is the value or values that are true for all equations in the system. The graphs of equations within a system can tell you how many solutions exist for that system. Look at the images below. Each shows two lines that make up a system of equations.</span>

 

<span><span>One SolutionNo SolutionsInfinite Solutions</span><span /><span><span>If the graphs of the equations intersect, then there is one solution that is true for both equations. </span>If the graphs of the equations do not intersect (for example, if they are parallel), then there are no solutions that are true for both equations.If the graphs of the equations are the same, then there are an infinite number of solutions that are true for both equations.</span></span>

 

When the lines intersect, the point of intersection is the only point that the two graphs have in common. So the coordinates of that point are the solution for the two variables used in the equations. When the lines are parallel, there are no solutions, and sometimes the two equations will graph as the same line, in which case we have an infinite number of solutions.

 

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Solve for x Show your work
telo118 [61]

Answer:

x = 12

Step-by-step explanation:

To solve this and show your work, you have to start of with the equation (3x - 6) = 30.

You then have to add 6 to both sides like this:

(3x - 6) = 30 \\   \:  \:  \:  \:  \:  \:  \:  \:  \:  \: + 6  \:  \:  \:   \:  \:   + 6

So then the 6 is cancelled out, and you are left with

3x = 36.

Now you just have to divide both sides by 3 like this:

\frac{3x}{3}  =  \frac{36}{3}

Which cancels 3 out, and you are left with

x = 12.

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