Answer:
Step-by-step explanation:
xy = 42
x+y = - 2 Substitute into the top equation
y = -2 - x Put in for y
x(-2 - x) = 42 Remove the brackets
-2x - x^2 = 42 Subtract 42 from both sides.
-2x - x^2 - 42 = 0 Put in the more normal order.
-x^2 - 2x - 42 = 0 Multiply by -1
x^2 + 2x + 42 = 0
This cannot be factored. It gives complex roots as it is written. I will give you the answer but I kind of doubt the question is correct.
x1 = - 1 + 6.40i
x2 = -1 - 6.40i
Leave a comment if you have a correction.
Answer:
7.) Line, point
8.) Line
9.) Line, point, rotational
10.) Rotational
11.) None
12.) Line
Answer:
254.469 inches^3
Step-by-step explanation:
v=(pi)(r)^2(h)
pi(3)^2(9)
pi(9)(9)
pi(81)
254.469
Anything times 0 is 0
anything times 1 is the number the was multiplied <span />
