Answer:
C) The expected value is -$40, so the man should not buy the warranty.
Step-by-step explanation:
The total cost to the man is expected to be the total of the amount he pays for the warranty and any amounts he gets because he has the warranty ...
-$100 +600×0.10 +0×0.90 = -$40
The expected value of the warranty is -$40. Based on that alone, the man should decide not to buy it.
____
<em>Comment on warranties</em>
The expected value of a warranty to the buyer is <em>always negative</em>. That is how warranty companies make their money. Clearly, <em>expected value</em> is not the only criterion that should be considered.
Answer:
The correct answer would be D. y+2=1/2(x+3)
Step-by-step explanation:
Point slope form can be written as y-y1=m(x-x1)
Since m is slope, we can see from the equation in slope intercept form that the slope is 1/2, so we can insert that into our equation. The rest is simply the process of inserting the values from the point on the graph into the equation.
Since y1=-2, we could put that as y--2 or y+2, since negatives cancel out.
Then we can replace x1 with -3, resulting in x--3 or x+3.
So our resulting equation is:
D.y+2=1/2(x+3)
Hope this helps!
(f○g)(x)=f(g(x))
(f○g)(x)=3(x^2+4)+2
(f○g)(x)=3x^2+12+2
(f○g)(x)=3x^2+14
A - 3 o’s (draw the 9,x,7,0 keys from calculator)
B - 2 o’s (draw the 4,x,8,0 keys from calculator)
C - 3 o’s (draw the 6,x,4,0 keys from calculator)
D - 3 o’s (draw the 5,x,9,0 keys from calculator)
Answer:
Step-by-step explanation:
t1 = a1
t2 = a1 + d
t3 = a1 + 2d
The sum is t1 + t2 + t3 = a1 + a1 + d + a1 + 2d = 3a1 + 3d
Second question
t1 = a1
t2 = a1 + d
t3 = a1 + 2d
t4 = a1 + 3d
...
tn = a1 + (n - 1)*d
Sum = (a1 + a1 + (n- 1)*d) * n / 2
Sum = (2a1 + nd - d) * n / 2
Sum = (2a1*n + n^2*d - nd) / 2