Solve for x and y (use elimination or substitution). Show work.
2 answers:
7x+3y-1 = 10x -7y+9 as vertical angles
7x+3y-1 + x = 180 as supplementary angles
So, we have system of equations:
7x+3y-1 = 10x -7y+9 (1)
7x+3y-1 + x = 180 (2)
1) Simplify equation (1)
7x+3y-1 = 10x -7y+9 -----> -3x +10y =10
2) Simplify equation (2)
7x+3y-1 + x = 180 -----> 8x +3y = 181
3)
(-3x +10y =10)*8 ------> -24x+80y =80
( 8x +3y = 181)*3 ---------> 24x + 9y = 543
4)
-24x+80y =80
+<u>24x + 9y = 543</u>
89y = 623
y = 7
5) -3x +10y =10
-3x + 10*7 =10
-3x +70 =10
-3x = -60
x=20
Answer : x=20, y = 7
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Answe 6-6
Step-by-step explanation: i hade 6 point and i lost 6 points hint 6-6
Y+3x=2----equation1
y-2x=-3-----equation 2
e1-e2
(y+3x)-(y-2x)=2-(-3)
y+3x-y+2x=5
5x=5
x=1
sub x=1 into equation 1
y+3(1)=2
y=-1
Answer:
A:1
Step by step explanations:
C(n,r)=C(5,5)
n=5
r=5
=n! / (r!(n-r)!)
=5! / (5!(5-5)!)
=1
