Answer:
The length of the third side of the triangle is 
Step-by-step explanation:
Let
c ----> the length of the third side of the triangle
we know that
Applying the law of cosines

we have

substitute the given values



Answer:
(−4x+1)(2x+3)
Step-by-step explanation:
Factor −8x^2−10x+3
−8x^2−10x+3
=(−4x+1)(2x+3)
brainliest please?
Answer: x doesn't equal four x would have to equal -5 because it cant before because it would be a zero and there would be no solution
Step-by-step explanation: brainliest plz
20 x 42= 840
So the area would be 840 mm^2.