If 15 is 3/8 of x(our number we are trying to find), the we can set up the equation:
15 = x * 3/8
15 * 8 = x * 3 (multiplied both sides by 8)
120 = 3x
120 / 3 = x (divided both sides by 3)
40 = x
Therefore, 15 is 3/8 of 40.
Answer:
One as a percent is 0.01%
Answer:
Mr.Strand washed the most, and 7/20ths more laundry are left.
Step-by-step explanation:
In order to find what the larger amount actually is, we'll need to convert both the fractions into something comparable by using the same denominator. We can do this by multiplying 1/4 by 5/5 for the other denominator, and multiplying 2/5ths by 4/4. You'll then get 8/20, which is how much Mr.Strand washed, and 5/20, which is how much his son washed. We can conclude that since 8 is greater than 5, Mr. Strand washed the most. Now we add up both 8 and 5 to figure out how many things they washed together. They washed 13 together, and the denominator is how much they need to wash total, we then subtract 13 from 20 to get 7. They need to wash 7 more things.
This is a perfect place to use Pythagoras' rule. When you do that, the answer rolls out immediately, and if you don't catch it , it falls off the edge of the desk.
Pythagoras' Theorem:
In a RIGHT triangle, the square of the longest side is equal to
(one short side)² + (other short side)² .
This is EXACTLY what you need, because MLN is a RIGHT triangle,
you know the length of both sort sides, and you need to find the
length of the longest side.
M = 5 , M² = 25
L = 12 , L² = 144
Add the squares together: 25 + 144 = 169
Pythagoras says that 169 is the square of N .
When you take its square root, you'll have the length of 'N'.