Determine a linear regression equation for the data rounded to the nearest hundredth. a. =−.32+1.28
b. =.33−1.23
c. =.34+1.26
d. =.33+1.24

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?