a student scores 71 out of 100 on a test. If the maximum score on the next test is also 100 points, what score does the student need to maintain at least an average of 79?

Question

terenzreignz · Answer

You know how to get the average?

anonymous · Answer

no,please help

terenzreignz · Answer

The average of two numbers, a and b is given by
$$\huge \frac{a+b}{2}$$

terenzreignz · Answer

So, we can let a = 71, as in his first test...
$$\huge \frac{71+b}{2}$$

terenzreignz · Answer

And this average has to be at least 79, so...
$$\huge \frac{71+b}{2}\ \ge \ 79$$
Now you just have to solve for b :)

Good luck :)

anonymous · Answer

huh?