Answer:
(-1-√33)/2, (-1+√33)/2
Step-by-step explanation:
If one of them is x, then it satisfies ...
x + -8/x = -1
x^2 -8 = -x . . . . . multiply by x
x^2 +x = 8 . . . . . add x+8
x^2 +x + 1/4 = 8+1/4 . . . . complete the square
(x +1/2)^2 = 33/4
x + 1/2 = ±(1/2)√33 . . . . . . take the square root
x = (-1/2)(1 ± √33) . . . . . . . subtract 1/2
The numbers are approximately ...
-3.37228, 2.37228
Think about thus; how many yards in are 1 mile? 1760. Thus, since we have 4 miles we multiple 1760 by 4. 7040. There are 7040 yards in 4 miles. :)
Answer: 360
Step-by-step explanation: do 180x2 and get your answer which is 360
Place value. when multiplying by 10 you are moving a decimal, having everything lined up like place value would save you a lot of time.
