A salesman travelled
2/5 of his journey before lunch and 3/8 of his journey after lunch. What fraction of his journey has he still to complete?

of his journey he still has to complete .

Step-by-step explanation:

Here we have , A salesman traveled  2/5 of his journey before lunch and 3/8 of his journey after lunch. We need to find  What fraction of his journey has he still to complete . Let's find out:

Let , total journey of salesman to travel be x . So , A salesman traveled  2/5 of his journey before lunch and 3/8 of his journey after lunch . Let , y be the fraction of his journey has he still to complete . So , According to question:

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Therefore , of his journey he still has to complete .

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

in 1995, potato plants were taken into space aboard the space shuttle columbia.

step-by-step explanation: