Answer:
18 dollars and 50 cents + s = 30 dollars
s minus 18 dollars and 50 cents = 30 dollars
Step-by-step explanation:
how much more of 18.50 to get to 30
30-18.50=11.50
s=11.50
These problems are what is known as changing a mixed fraction to an improper fraction. Lets start with 5 1/8.
What we want to do is take the big number on the side and add it to the top of the fraction in a special way to make it an improper fraction. (An improper fraction means a fraction with a bigger top than bottom).
To add 5 to 1/8, we have to multiply 5 by 8 and then add it. 5 times 8 is 40 so if we add that to the top we know that the improper fraction we are looking for is 41/8.
We can do the same thing for 3 4/12, multiply 3 by 12 and add it to the top of the fraction. 3 times 12 is 36, add that to the top to get 40/12.
See if you can do 1 6/12 and comment with an answer, if you get it wrong I will keep helping you till we get this down!
Answer:
(x+3)(x-3)
Step-by-step explanation:
x²-b² = (x+b)(x-b)
x²-9 = x²-3² = (x+3)(x-3)