Answer:
Hence, the expected rate of return after 1 year for Mary's portfolio is 
Step-by-step explanation:
We have,
Purchase 7 shares of stock A for $70 per share and 4 shares of stock B for $100 per share then The expected rate of return after 1 year for Mary's portfolio.
Weight invested in stock A is 

Weight invested in stock B is

The expected value of the rate of return



Answer:
a = Negative one-fifth
Step-by-step explanation:
The given equation is :

We need to find the value of a.
Subtract 2/5 from both sides.

So, the correct answer is Negative one-fifth. Hence, the correct option is (b).
Step-by-step explanation:
a power supply, a load suited to the power supply, and wiring as a conductor
B and c would be answered
36259 + 12258 + 1988 = 50,505 per year
I do not know if ur question is asking how much she will pay for 1 yr, or for 4 years. But if it is for 4 yrs, it will be 4(50,505) = 202,020.