Book Maths Puzzle Algebra

solve system by substitution

{3x-y=6

x+2y=2

Read Solution (Total 0)

Book Other Question

put each of the following i y=a(x-h)^2+k form and find the minimum value.

A. f(x)=x^2 +12x +50

B. g(x)=x^2 -6x+3 Hy, this is from a book.

An investor has 3 shares, Delta Airlines, Hilton Hotels and Mcdonalds. He says that 2 days ago the shares went down 350$ and yesterday they went up 600$. His stock broker remembers that 2 days ago Delta lost 1$ per share, Hilton lost 1.5$, and Mc gained 0.5$. he also remembers that yesterday Delta gained 1.5$, Hilton lost again 0.5$ and Mc gained 1$. Explain why there isnt enough information to calculate the number of shares the investor has. But if the investor says that he has 200 shares of Mc, how many does he posses of the other 2?

I dont know how to put this info into 2 equations with 3 unknows. thanks i hope you can help me.