If 5 pens cost Rs 90,what is the cost of 8 pens?

Rs. 144

Step-by-step explanation:

To what the cost of each pen, divide 90/5

You get 18. So each pen costs 18.

Now multiply 18 by 8 and you would get 144.

So, it would cost Rs. 144

x=half

step-by-step explanation:

days of the week

step-by-step explanation:

javier earned more money then kyle, so that won't always be a constant term, but the days of the week do not change so that term is always constant.

edit: i meant