The sum of two positive integers is 13 the difference between these numbers is 7 what is their product ? Explain :
2 answers:
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Answer:
Step-by-step explanation:
The standard form for the equation of a circumference is:
Where:
(a, b) is the center of the circumference
r is the radius
In this problem we have the equation of the following circumference, and we want to convert it to the standard form:
The first thing we must do to transform this equation into the standard form is to use the square completion technique.
The steps are shown below:
1. Group all the same variables:
2. Take the coefficient that accompanies the variable x. In this case the coefficient is 10. Then, divide by 2 and the result elevate it to the square.
We have:
3. Add on both sides of the equality the term obtained in the previous step:
4. Factor the resulting expression, and you will get:
Write the equation in the standard form:
Then, the center is the point (5, 0) and the radius is r = 2.
Observe the attached image
Answer:
5 years
Step-by-step explanation:
Step one:
Given Information
Principal= $34,000
rate = 4.8%
SImple interest = $8,160
Required
The time T of the investment
Step two:
the expression for simple interest is
substitute
cross multiply we have
divide both sides by 163200