There are 60 minutes in one hour. How many minutes are in 60 hours?
You can use a two simple fractions to solve this. Set the problem up like this: minutes/hours = minutes/hours. Plug in the numbers we know, and variable x for the unknown: 60/1 = x/12 Cross multiply: (1)(x)=(60)(12) x=720 There are 720 minutes in 12 hours.
What is a single piece of coiled DNA called?
A single coiled DNA is called a chromosome. Each human contains 23 pairs of chromosomes, making up 46 chromosomes in total.
Johnathan went to the store to buys pants and socks. Johnathan bought a pair of pants for $42 dollars. This is 14 less than twice what he spend on his socks. How much were the socks?
So, lets make the variable p represent the price of the pants and the variable s represent the price of the socks. This makes p=42 and p=2s-14. Simply plug in the known variable p into the second equation to solve for s, the price of the socks. 42=2s-14, add 14 to both sides. 56=2s, divide each side by 2 to isolate the variable. 28=s s=$28 The price of the socks was $28.