Answer:
2.5
Step-by-step explanation:
i did it and got it right
It equals to 65 for the exact answer
The inequality that represents the number of right answers (r) and wrong answers (w) Olga can give to win the contest is: ![3r-w>100](https://tex.z-dn.net/?f=3r-w%3E100)
<u><em>Explanation</em></u>
Number of right answers is
and number of wrong answers is ![w](https://tex.z-dn.net/?f=w)
Olga earns 12 points for each right answer and loses 4 points for each wrong answer.
So, total points earned for
right answers
and total points lost for
wrong answers ![=4w](https://tex.z-dn.net/?f=%3D4w)
That means, <u>her score will be</u>:
points.
In order to win the quiz contest, Olga must score <u>more than 400 points</u>. So, the inequality will be.......
![12r-4w>400\\ \\4(3r-w)>400\\ \\ 3r-w>100](https://tex.z-dn.net/?f=12r-4w%3E400%5C%5C%20%5C%5C4%283r-w%29%3E400%5C%5C%20%5C%5C%20%203r-w%3E100)
If you meant -3x then the answer is (2,12)
They have the same measurements but they are turned different ways