Question

What is the value of the expression 4x + 3y x=1/2 y=2/5

Answer 1

9.5

Explanation:

4(1.5) + 3(2.5) input variable values

2 + 7.5 multiply

9.5 add

Answer 2

`:\implies\sf\:5x+3y`

Given that, x = 1/2 and y = 2/5

`:\implies\sf\:4* (1)/(2)+3* (2)/(5)`

`:\implies\sf\:(4)/(2)+(6)/(5)`

`:\implies\sf\:2+(6)/(5)`

Taking LCM,

`:\implies\sf\:((2* 5)+6)/(5)`

`:\implies\sf\:(10+6)/(5)`

`:\implies\bf\:(16)/(5)`