Solve the following system algebraically. y = x2 +x
y = -x - 1

A) (-2,3)
B) (-1,0)
C) (0,0)
D) (-5,2)

B

Step-by-step explanation:

-x - 1 = x^2 + x

x^2 + 2x + 1 = 0

(x+1)(x+1) = 0

x = -1 (double soution)

y = 1-1 =

y =0

(-1,0) = double solution

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points

i think the answer is b.

step-by-step explanation:

not 100% sure though.