Answer:
180º
Step-by-step explanation:
All the interior angles add up to 180º degrees.
Answer:
0
Step-by-step explanation:
2a+6=6
-6=-6
2a=0
2 2
a=0
572 rounded to the nearest 10 is 570 and 572 rounded to nearest 100 is 600.
9514 1404 393
Answer:
(x, y) = (-2, -1) or (2, 1)
Step-by-step explanation:
Substitute for x in the first equation:
(2y)^2 +3(2y)y = 10
10y^2 = 10
y^2 = 1
y = ±1
x = 2y = ±2
Solutions are (x, y) = (-2, -1) or (2, 1).