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reaunnatowns
25.12.2020 •
Mathematics
Сатре о
Find the condition that the roots of the quadratic equation
ax2 + cx + C =0
may be in the ratio m:n
Solved
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Ответ:
Step-by-step explanation:
Given
Required
Condition that the roots is in m : n
Let the roots of the equation be represented as: mA and nA
A quadratic equation has the form:
or
We have the roots to be mA and nA.
So, the sum is represented as:
And the product is represented as:
By comparing:
with
So, we have:
Make A the subject:
Substitute![A = \frac{-b}{a(m+n)}](/tpl/images/1007/5614/1bfcd.png)
Multiply both sides by a
Cross Multiply:
Hence, the condition that the ratio is in m:n is
Ответ:
Part A: Total cost = 10 + 4s
Part B: Solving for s = 2
10 + 4 * 2 = US$ 18
Correct statement and question:
Write an expression to represent admission to a zoo of $10.00 and the cost of special exhibits s at $4 each. Evaluate your expression when s = 2.
Source: https://www.slader.com/discussion/question/write-an-expression-to-represent-admission-to-a/
Step-by-step explanation:
1. Let's review the information provided to us to answer the question correctly:
Admission to the zoo = US$ 10
Special exhibit cost (s) = US$ 4
2. Evaluate your expression when s = 2
Total cost = Cost of admission + (s) * Special exhibit cost
Total cost = 10 + (s) * 4
Total cost = 10 + 4s
3. Solving for s = 2
10 + 4s
10 + 4 * 2 = US$ 18