Answer:
Ans. C
Step-by-step explanation:
The value of x is 66 and value of y is 17
Height is 18 for question 3.
First of all, your second term is already wrong. When you divided 8x² by 4 ,
you should have written 2x² , not 4x² .
Make that correction, and then divide the whole thing by 'x'.
Then you'll have x² - 2x + 1 = 0 .
You should have no trouble solving that one,
(especially since it's a perfect square)
That gives you two (equal) solutions. But you should also ask yourself:
"Self ! Where is the third solution ? A cubic equation like the original
one needs three solutions."
I'll give you that one:
Look over the original equation, and look at what happens to it when x = 0 .
Then the left side becomes zero, and the equation is 0 = 0 . Since that's a
true statement, " x = 0 " is another solution of the cubic equation, and now
you have all three of them.
Answer: Q = K(L + 5)
Step-by-step explanation: Một doanh nghiệp cạnh tranh thuần túy có hàm sản xuất là Q = K(L + 5). Biết rằng giá thuê một đơn vị vốn là wK = 5USD, giá thuê nhân công