Answer:
Step-by-step explanation:
Plug the first equation into the second

y=-2(-15)-5
=30-5
=25
Answer:
a² + b² = c²
Step-by-step explanation:
Pythagorean Theorem: a² + b² = c²
We use the Pythagorean Theorem to help us solve for missing right triangle side lengths. It is wise to remember this formula.
The answer is 41 , this is because the angles have to add up to 180 in total therefore 180-139 = 41
A,c and d appear in the diagram except b
a:< DCE
c: line CE
d: line AB
all of these are in it while
b:< CDE
is not present in it, because there is no anglethat is formed on d
Answer is (4,-3) I’m pretty sure it’s right sorry if it’s wrong