<span>the Law of Cosines </span>b^2=a^2+c^2-2accosB
If you want integer coefficients only, multiply the equation of the line by 10. I'm assuming you accidentally left off the "= 0" at the end: -1.7x + 8.5 = 0.
If that's the case, then multiplying the whole equation by 10 results in -17x + 85 = 0.
Here you have only integer coefficients.
14/9
You would get this by first getting the fraction out of the denominator by multiplying the inverse by the numerator. Then you can cross multiply and solve.
63 + 36...there is a common factor of 9
9(7 + 4) <== this is equivalent
63 + 36...there is a common factor of 3
3(21 + 12)...but this is not an answer choice...but it is equivalent
