Step-by-step explanation:
So 95 is a linear pair. a linear pair adds up to 180 so 180 - 95 = 85
X = 85
y = 50
The discriminant is the part under the sqrt in the quadratic formula
for ax²+bx+c, the discriminant is b²-4ac
if the discriminant is
less than 0, then there are non-real roots
equal to 0, then there is a double root
greater than 0, then there are 2 real roots (may be rational or irrational)
so
1x²-5x+7
b²-4ac=(-5)²-4(1)(7)=25-28=-3
less than 0 so it is non real roots
answer is D
Answer:
Step-by-step explanation:
x-y=-3
y=-3x+1
x-(-3x+1)=-3
y=-3x+1
x+3x-1=-3
y=-3x+1
4x=-3+1
y=-3x+1
4x=-2
y=-3x+1
x=-2/4
y=-3x+1
x=-1/2
y=-3(-1/2)+1
x=-1/2
y=3/2+1
x=-1/2
y=3/2+2/2
x=-1/2
y=5/2
(x,y)=(-1/2,5/2)