Question

Evaluate

5x, if x =2/5
5/x,if x =5
2y-1, if y =2/3
h+3/4, if h = 1/2

Please answer all of above ASAP please 20 points

Answer 1

5x if x= 2/5 . 5/1x 2/5= 10/5= 2

5/x = 5/5= 1

8/3_ 1 = 8/3- 3/3= 5/3

1/2+ 3/4 = 2/4+3/4= =5/4

Answer 2

Answer: a) 2 b)1 c)1/3 d)5/4

Explanation:

Hi to solve this equation we simply have to replace the variable with the number given, and then isolate the variable.

• 5x, if x= 2/5

5 x 2/5 = 10 /5 = 2

• 5/x,if x =5

5/5= 1

In this case after replacing the number we have to simplify it.

• 2y-1, if y =2/3

2 (2/3) -1 =

4 /3 -1 =

4/3 -3/3 = 1/3

In this case, to add fractions first we have to multiply the top and bottom numbers of the second fraction by 3, to have the same denominators.

• h+3/4, if h = 1/2

1/2 + 3/4 =

2/4 +3/4 = 5/4

Feel free to ask for more if it´s necessary or if you did not understand something.