How many ways can we add three non negative integers to get n?
1 answer:
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The solutions of the quadratic equation 0 = -3x² - 4x + 5 are
and
Step-by-step explanation:
The quadratic formula of the quadratic equation ax² + bx + c = 0, is
To find the solution of the quadratic equation by using quadratic formula
- Find the values of a, b, and c from the quadratic equation
- Substitute these values in the quadratic formula
- Calculate the values of x
∵ -3x² - 4x + 5 = 0
∴ a = -3 , b = -4 and c = 5
- Substitute these values in the quadratic formula
∵
∴
∴
- Simplify by dividing up and down by -2
∴
∵
∴
∴
- Simplify by dividing up and down by -2
∴
The solutions of the quadratic equation 0 = -3x² - 4x + 5 are
and
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Answer:
the height that represents the 99th percentile is 69.324 inches
Step-by-step explanation:
Given that :
the mean height = 62.8 inches
standard deviation = 2.8 inches
For 99th percentile;
Let X be the random variable;
SO, P(Z≤ z) = 0.99
From the standard normal z tables
P(Z )= 2.33
The standard z score formula is :
2.33 × 2.8 = X - 62.8
6.524 = X - 62.8
6.524 +62.8 = X
69.324 = X
X = 69.324
Therefore; the height that represents the 99th percentile is 69.324 inches