Answer: x= - 3; y = -4
Step-by-step explanation:
-x + y = -7
<u>-3x - y = -5</u>
-4x = -12
x= -12 /- 4
x= - 3
-x + y = -7
-(-3) + y = - 7
3 + y = - 7
y = - 7 + 3
y = -4
-x + y = -7
-3 - 4 = - 7
- 7 = - 7
Answer:
it is because 10 times 100 is 1000 so it would be the same thing
Step-by-step explanation:
Answer:
I think the answer is 2
Step-by-step explanation:
Complementary angles are angles that add up to 90 degrees. Supplementary angles are angles that add up to 180 degrees.
So therefore we know that A and B always add up to 90 degrees and B and C always add up to 180 degrees.
So first question:
A + B = 90
52 + B = 90
-52 -52
B = 38
And then B + C = 180
38 + C = 180
-38 -38
C = 142
You can do the same thing for the second problem, except this time you already know B.
A + 67 = 90
-67 -67
A = 23
67 + C = 180
-67 -67
C = 113
Next one:
Now you have to first find the angle of B.
B + 107 = 180
-107 -107
B = 73
A + 73 = 90
-73 -73
A = 17
Last one:
A + 12 = 90
-12 -12
A = 78
12 + C = 180
-12 -12
C = 168