This is the most easier question anyone has asked yet. kill me
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
Answer:
2.1 + 2x = 7.5
Step-by-step explanation:
Answer:
-5x
Step-by-step explanation:
Answer will be -24
+4-24-4 = -24