... ϩ 9 The product of the last pair of terms equals 9. There are a few possibilities for these terms: 3 and 3(because 3 ϫ 3 ϭ 9) , Ϫ3 and Ϫ3 (because Ϫ3 ϫϪ3 ϭ 9) , 9 and 1 (because 9 ϫ 1 ϭ 9) , 9 ... ϭ 9x ϩ 3, which of the following is equal to f(4b)?a. 36b ϩ 12bb. 36b ϩ 12c. 36b ϩ 3d.ᎏ4b 9 ϩ 3ᎏe.ᎏ 9 4ϩb3ᎏAnswerc. If f(x) ϭ 9x ϩ 3, then, for f(4b), 4b simply replaces x in 9x ... choose the value of d that wouldmake 15x ϩ dy identical to 15x ϩ 9 y.Ifd ϭ 9, then:15x ϩ 9y ϭ 1215x ϩ 9y ϭ 21Thus, if d ϭ 9, there is no solution. Answer choice e is correct.Functions,...