5k^3 - 3k + 7.-(-2k^3 + k^2 - 9)
7k^3 +k^2-3k +16
C. 7k^3 - k^2 - 3k + 16
There are different ways to find the solution. (You can find solutions for this equation, but the solutions aren’t infinitely)
Examples
3•2+3•2=12
2+2=4
Or
3•0+3•4=12
0+4=4
Or
3•1+3•3=12
1+3=4
5 dimes = 50 cents
2 nickels = 10 cents
you have 60 cents
Using proportions is the easiest way to solve these type of questions. Proceed as such:
<u> 5 miles </u> = <u> 'x' miles </u>
1.5 hours 13.5 hours
'x' miles = (5 miles / 1.5 hours) * (13.5 hours)
'x' miles = 45 miles
