Just plug in 4 for the x
2*4 +4y =36
8+4y =36
4y =36-8
4y=28
y= 28/4
y=7
Answer: <em>"7 is a solution to the original equation. The value –1 is an extraneous solution."</em>
Step-by-step explanation:
The equation
can be solved by squaring both sides:

We can see that -1 and 7 are solutions, but make sure they are not extraneous by substituting them in the original equation:

The square root of 49 equals 7, but the square root of -1 is an imaginary number.
The correct choice is <em>"7 is a solution to the original equation. The value –1 is an extraneous solution."</em>
Answer:
true
Step-by-step explanation:
2 angles are congruent when they they have the same measure
Answer:
x = 4
Step-by-step explanation:
The ratio of the side opposite the large filled dot to the hypotenuse is ...
16/20 = x/5
(4/5)(5) = x = 4 . . . . multiply by 5
The value of x is 4.
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The angle marks tell us the triangles are similar.