The number 6.9 is already rounded to the nearest tenth.
Answer:
perpendicular I believe
Step-by-step explanation:
I'd plot the points and make a line using a ruler to check though.
The answer is 20in. You multiply 4 by 5 because 5x5 is 25 so the answer is 20
X²+3x-21=0
1) we solve this square equation:
x=[-3⁺₋√(9+84)] / 2=(-3⁺₋√93)/2
We have two solutions:
x₁=(-3-√93)/2
x₂=(-3+√93)/2
2) we compute the product of the 2 solutions found.
[(-3-√93)/2][(-3+√93)/2] =(-3-√93)(-3+√93) / 4=
=(9-93)/4=-84/4=-21
Answer: the product of the 2 solutions of this equation is -21