Simplify this expression 10 exponent of 0

Which best describes the strength of the correlation, and what is true about the causation between the variables? it is a weak negative correlation, and it is not likely causal. it is a weak negative correlation, and it is likely causal. it is a strong negative correlation, and it is not likely causal. it is a strong negative correlation, and it is likely causal.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

X+ y = 5 ; x - y =3 solve using linear combination