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if f(x)= 5x^2, what is 3f(x)

a. 8x^5

b. 15x^2

c. 15x^6

d. 125x^8

2-digit numbers less than 91 which are 1 less than a multiple of 10

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective