Answer:
x=-9, y=5. (-9, 5).
Step-by-step explanation:
x-3y=-24
5x+8y=-5
--------------
x=-24+3y
5(-24+3y)+8y=-5
-120+15y+8y=-5
-120+23y=-5
23y=-5-(-120)
23y=-5+120
23y=115
y=115/23
y=5
x-3(5)=-24
x-15=-24
x=-24+15
x=-9
Answer:
8 is your answer ^_^
Step-by-step explanation:
Answer: √90=3√5⋅2=3√10
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
Since Δ ABC is isosceles , then AB = AC and the base angles are congruent.
∠ ACB =
=
= 65°
∠ ACB and ∠ BCE are adjacent angles and are supplementary, thus
∠ BCE = 180° - 65° = 115° → C