7 green pears + 5 yellow apples = 12 fruits in total
So your answer would be 12 but we have a problem because none of the pears are the same color as the apples. We can fix this by simply adding one.
1 + 12 = 13
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So your answer will be 13.
Hope this helped. Have a great day!</span>
Answer:
After solving the equation we get x=-2 and x= 4 i.e {-2,4}.
Option B is correct.
Step-by-step explanation:
We need to solve
Solving:
Cross multiply
Multiplying:
Now, we have got quadratic equation
Solving this quadratic equation using quadratic formula
We have a=1, b=-2 and c=-8 Putting values
So,after solving the equation we get x=-2 and x= 4 i.e {-2,4}.
Option B is correct.
They will require between 18.42 and 31.58 minutes.
We want the middle 90%. The two probability values associated with this would be 0.95 and 0.05; this would leave 5% below and 5% above, giving us the middle 90%.
Using a z-table (http://www.z-table.com) we see that the z-score associated with an area to the left of 0.05 is between -1.64 and -1.65; since it is equally distant from both we will use -1.645.
The z-score associated with an area of the left of 0.95 is between 1.64 and 1.65; since it is equally distant from both we will use 1.645.
The formula for a z-score is
z = (X-μ)/σ
-1.645 = (X-25)/4
Multiplying by 4 on both sides,
-1.645(4) = X-25
-6.58 = X-25
Adding 25 to both sides,
-6.58+25 = X
18.42 = X
For the upper bound,
1.645 = (X-25)/4
Multiplying both sides by 4,
1.645(4) = X-25
6.58 = X-25
Adding 25 to both sides,
6.58+25 = X
31.58 = X
The times are between 18.42 and 31.58 minutes.