Answer:
Absolute value;
The non-negative value of x(in your case -19) without regard to its sign.
Basically how far in distance x(in your case -19) is away from 0.
|–19| = <u>19</u>
The Pythagorean theorem is the idea that the sum of the two legs which are both squared is equal to the hypotenuse's length squared.
*<em>look at the image I attached for a better explanation</em>
By looking at the picture, we are missing the leg's length, and by using the Pythagorean theorem, we get the equation

Thus the <u>missing side length is 13.2 cm</u>
Hope that helps!
No, u cannot to simply a fraction bout numbers should both be divisible by the same number.
Answer:y
=
2
,
2
x
−
y
=
−
1
x
+
2
y
=
4
,
x
−
y
=
−
3
x
−
y
=
9
,
x
+
y
=
6y
=
2
,
2
x
−
y
=
−
1
x
+
2
y
=
4
,
x
−
y
=
−
3
x
−
y
=
9
,
x
+
y
=
6y
=
2
,
2
x
−
y
=
−
1
x
+
2
y
=
4
,
x
−
y
=
−
3
x
−
y
=
9
,
x
+
y
=
6
Step-by-step explanation: