Directions: Evaluate each rational expression using the indicated values of the variable.

1. [tex] \frac{5x}{2y} [/tex]
a. when x = 8 and y = 10
b. when x = 1/2 and y = 2/3

2. [tex] \frac{ {ab}^{3} }{c} [/tex]
a. when a = 4, b = 3, and c = 2
b. when a = -2, b= -2, and c = 2
3. [tex] \frac{e \: + \: 5}{4f \: - \: 4} [/tex]
a. when e = 11 and f = 7
b. when e = -1 and f = -4

Pls answer it perfectly, so there will be no reported answers, thank u :)

[tex]1) \: \: \frac{5x}{2y} \\ a) \: \: x = 8 \: \: and \: \: y = 10 \\ \frac{5x}{2y} \\ \frac{5(8)}{2(10)} \\ \frac{40}{20} \\ 2 \: ans \\ b) \: \: \frac{5x}{2y} \\ \frac{5( \frac{1}{2}) }{2( \frac{2}{3}) } \\ \frac{2.5}{1.3} \\ \frac{25}{13} \\ 1.92 \: \: ans \: \\ \\ 2) \: \: \frac{a {b}^{3} }{c} \\ \\ a) \: \: a = 4 \: .\: b = 3 \: . \: c = 2 \\ \\ \frac{a {b}^{3} }{c} \\ \frac{(4) {(3)}^{3} }{2} \\ \frac{4(27)}{2} \\ \frac{108}{2} \\ 54 \: \: ans \: \\ \\ b) \: \: a = - 2 \: . \: b = - 2 \: . \: c = 2 \\ \\ \frac{a {b}^{3} }{c} \\ \frac{( - 2) {( - 2)}^{3} }{2} \\ \frac{ - 2 { (- 2)}^{3} }{2} \\ \frac{ - 2( - 8)}{2} \\ \frac{16}{2} \\ 8 \: \: ans \: [/tex]

Step-by-step explanation:

question 3 is already answered by me in your question..or you can see attachment.