The answer is D:10 cm, I just took it and got this.
If you mean hours, and Minutes that is 1 hour and 30 minutes.. s a fraction that is 1 1/2. Or 90/60
Slope intercept form = Y = Mx + B
15 = -3y + 21x
3y = 21x - 15
Y = 21/3 X - 15/3
Y = 7x - 5 = SI Form
Answer:c
Step-by-step explanation:
Answer: 
Work Shown:
I'm assuming your teacher wants you to factor as much as possible.

In the last step, I used the rule that 
We cannot factor any further. If the first term was
instead of
, then we could use the difference of squares factoring rule.