Your bill for lunch was $54.70. The service was very good so you decide to tip the server 20%. You do not have anything with you to help you calculate the tip. How much would you estimate is a 20% tip on a bill of $ 54.70?​

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.

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

What is the common difference for this arithmetic sequence? -6,-2,2,6,10 a.4 b.5 c.3 d.6