Answer:
Let x represent the amount of weeks she is saving up for the bike, and y represents the cost of the bike.
The equation would look like this:
So, let's say the bike costs $2000.
Divide 2000 by 20, and it will give you the x value (or, the amount of weeks it will take)
It will take 100 weeks for her to save $2000 for the bike, if she puts back $20 each week.
ten times as much as 700 i think its 10 x 700 = 7000
The answer is C he has 3 choices out of 81...the 4 just represents the amount of problems there are if there are 3 possible answers then the probability of him answering the questions correct is 3 of 81
9! you half the middle x value (-6x) to get -3 and than you square that value to get 9. That leaves your final trinomial as x^2-6x+9 (x-3)(x-3)