1.) use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth .x squared minus 21 x equals negative 4 x 2.) which kind of function best models the data in the table? use differences or ratios. x y 0 1.7 1 6.8 2 27.2 3 108.8 4 435.2 3.) solve the system of equations algebraically. show all of your steps. y equals x squared plus two x; y equals three x plus twenty !

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?