5.45-8.7= -3.5
-3.5÷-2.5= 1.3
Since you divided by a negative number switch the signs. So it would be A. the first one
Please use " ^ " to denote exponentiation: <span>2x^2 + 3xy – 4y^2
Now let x=2 and y= -4:
2(2)^2 + 3(2)(-4) - 4(-4)^2 = 8 - 24 -4(16) = -16 - 4(16) = -5(16) = -80 (answer)</span>
Answer:
The answer to your question is: x = -1
Step-by-step explanation:
Data
slope of l = x
slope of m = x +2
they are ⊥
Process
If they are ⊥, then, x + 2 = - 1/x
x(x + 2) = -1
x² + 2x = -1
x² + 2x + 1 = 0
(x + 1)² = 0
x + 1 = 0
x = -1