Answer:
It's the law of cosines
Step-by-step explanation:
law of cosines states that 
so we know that a = 7, b = 4, and alpha would be 135 degrees, so just plugging it in gets us 49+16-2*7*4*(-0.707) = 65 + 39.59 = 104.59
9514 1404 393
Answer:
2
Step-by-step explanation:
We assume your recursive formula is ...

Using this to find a4, we get ...

M, or slope, is needed to define if a set of lines are parallel or not.
The answer would be, it was reduced by 35%
$14 - covert 2/5 to a decimal (or percentage) = 0.4 (40%) and then multiply by 35.