Step-by-step explanation:
6x + 21y = 103
-6x + 23y = 51
The signs of the x coefficients are opposite. So adding the equations will eliminate the x terms.
44y = 154
y = 3.5
Answer:
30, 60, 90
Step-by-step explanation:
since there are 6 x's in total, and there are a total of 180 degrees in any triangle, we do 180/6= 30
so now we know x=30, 2x=60, and 3x=90
Answer:
C. (8,1)
Step-by-step explanation:
Answer:
42
Step-by-step explanation:
To determine a + a² just substitute the value of a.
Given a = 6.
Therefore, a + a² would become 6 + 6² = 6 + 36
= 42
∴ a + a² = 42
Well because only one is needed cause the answer is 0.1