Factor completely 25x^4 - 49

(5x^2 + 7)(5x^2 - 7)

(5x^2 + 7)(5x^2 + 7)

x^2(5x + 7)(5x - 7)

(5x^2 - 7)(5x^2 - 7)

Kerion has a beaded necklace business. she can make 12 necklaces is 2 hours. how long will it take her to make 9 necklaces?

If x varies directly as y, and x = 7.5 when y = 10, find x when y = 4

Will make ! for correct answer the dot plot below shows the number of toys 21 shops sold in an hour.is the median or the mean a better center for this data and why? a. median; because the data is not symmetric and there are outliersb. median; because the data is symmetric and there are no outliersc. mean; because the data is symmetric and there are no outliersd. mean; because the data is skewed and there are outliers