Answer:
Step-by-step explanation:
The expected return is given as
Expected Return = SUM (Return i x Probability i). i=1,2,3.....
First investment
Probability of 0.7, it returns 60cents per dollars
Second investment
Probably of 0.3, it loses 20cents per dollar.
Expected return=(0.7×60)-(0.3×20)
Excepted return= 42-6
Excepted return=36cents
To dollars, 1cents is 0.01dollars
Then, 36cents = 0.36dollars
Expected return=$0.36
Let's call the 13¢ stamps a and the 18¢ stamps b:
a+b = 42 and therefore a= 42-b (formula 1)
0.13a+0.18b= 6.66 In this formula, substitute the value of a according to formula 1:
0.13(42-b)+0.18b= 6.66 Multiply on the left to get rid of the parenthesis:
5.46-0.13b+0.18b= 6.66 Subtract 5.46 from both sides:
-0.13b+0.18b= 1.20 Add on the left:
0.05b= 1.20 Divide both sides by 0.05
b= 24 You have 24 18¢ stamps and:
42-24= 18 13¢ stamps
Check: (24 x 0.18) + (18 x 0.13)= 6.66 Correct.
The answer would be 12. To find this u would have to first add 8,12, and 15=36 Next, divide 36 by 3 =12
Answer:
3 is your slope, 2 is the y intercept
Step-by-step explanation:
Start at (0,2) or 2 on the y axis. Your slope is 3 or, 3/1 slope is always rise over run, so for every 3 you go up, you go over one. so make a dot at (0,2), then a dot at (1,5), then at (2,8). and so on. Always go to the right one and up three. If you need to go into the negatives, you will go left 3 and down one, so (-1,-1), then (-2,-4), and so on.
