Answer:
-3/2
Step-by-step explanation:
Let x = the integer:
2x^2 - 18 = 9x
2x^2 - 9x - 18 = 0
Now either factor that or use the quadratic formula if you're lazy like me.
x = -3/2 and 6, so x must be 6 because it has to be an integer.
10.40
you have to add the cost together and round it to the nearest cent which will .40 for your cent
We can do it with math:
30 hundred thousands is 30 00 000 (6 zeros!)
and the number is 3 000 000 - also six zeros, so yes, this is the same number and she's correct!
