Posted by **Thanh** on Friday, April 22, 2011 at 12:00am.

What is the probability that x^2+7x+k will factor if k is greater or equal to zero and less than or equal to 20, considering k is an integer.

How do I do this?

- Math -
**MathMate**, Friday, April 22, 2011 at 9:10am
Basically, let k=1,2,...20 and try to factor all of the 20 cases. See which one factors and divide the factorable cases by 20 to get the probability.

On the other hand, we know than to factor, k must have two factors that add up to 7, such as 1*6,2*5,3*4...

I'll let you work from here.

## Answer this Question

## Related Questions

- math - State the null hypothesis, Ho, and the alternative hypothesis, Ha, that ...
- Rational Inequality with Absolute Value - Here's a question I'm having trouble ...
- Probability - Check my answers, thanks! Roll 2 dice. What is the probaility of ...
- Algebra--Correction? - Solve x^2 -3x is greater than or equal to 10 Would the ...
- math - sketch the feasible region for this system of the inqualities and find ...
- discrete math - Could someone help me with this induction proof. I know its true...
- random variables - For the standard normal random variable Z, compute the ...
- statistics - A two-tailed test is conducted at the 0.10 significance level. What...
- calculus - Consider the function f(x)=65x−cos(x)+2 on the interval 0 less ...
- Algebra - Use a graphing calculator or a computer to graph the system of ...