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3 years ago

1. 3x + 7 = 13 (x = -2; x = 2; x = 5)

Mathematics

2 answers:

White raven [17]3 years ago

7 0

3x + 7 = 1 3

3x = 13 - 7

3x = 6

x = 6/3

x = 2

Leya [2.2K]3 years ago

7 0

Answer: x=2

Step-by-step explanation:

I am assuming you are asking which x fits the equation. To see if x works for the equation, you would plug it in.

x=-2

3(-2)+7=13

-6+7=13

1≠13

x=2

3(2)+7=13

6+7=13

13=13

x=5

3(5)+7=13

15+7=13

22≠13

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Answer:

XY is 4 units.

Step-by-step explanation:

We are given the following in the question:

Right triangle ABC is similar to triangle XYZ.

AB = 20.8 units

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We have to find the length of side XY.

Since the given triangles are similar, they have the following property:

The ratio of corresponding sides of similar triangles are equal.

We can write,

$\displaystyle\frac{AB}{XY}=\frac{BC}{YZ}=\frac{AC}{XZ}$

Putting the given values, we have,

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