Answer: No, the friend is correct. In any function, each input value can only lead to one output value. When you input 3 for the x-values, you would get two output values because 3 is included in both equations. To fix this, you need to have the 3 not included in one of the equations.
For example, you could say 
or 
because the input value of 3 would not be included twice.
If you look at the attached screenshot, you will see that if you keep your friend's function, inputting 3 will result in two outputs of 4 and -3, so therefore, 
cannot represent a piecewise function.
Answer:
<em><u>True.</u></em>
Step-by-step explanation:
We have to tell about the statement true or false
Two triangles that have the same side length will always be congruent
The SSS congruency rule states that if all three sides of one triangle are equal to corresponding three sides of another triangle, then the triangles are congruent.
∴ we say that when the sides are the same then the triangles are congruent.
<u><em>Hence, the statement is true.</em></u>
Because the definition of a congruent triangle is a triangle with every side of same length.
Yes, he is correct. Since.....
(−2)^4
=(−2)*(−2)*(−2)*(−2)
=(−2)^4
=16
You have to times all the numbers together to get the surface area.
So that means you have to do 16*12*5.
