1. 19.6
2. 30.4
3. 0.486
4. 56.4
5. 90.2
6. 54
7. 1.19
8. 212
That should be some help.
$27.55
29.95 x 8% (aka .08) = 2.396
29.95- 2.396 = 27.55
49 because he can play all the cards at the same time if he can, also he can play his cards between 1 and 7 times so you would multiply 7 by its self.
To solve this question, you need to know the rate in which the money is being spent. First, you know the y-intercept, which is 4000, or the money she owned before spending it. Next, you know, how much she had spent in the duration of 3 months. So, if you substitute those numbers into y=ax+b, it would be 2800=-3a+4000 (or 2800=4000-3a either way it is equivalent) If you solve this, you know that the college freshman is spending her money at a rate of $400 per month. Hope this helps :)