Answer:
50 total penguins
Step-by-step explanation:
In the following example x = the total number of penguins.
Set it up as follows.
15 over x = 30 over 100
Cross multiply the numbers. (30 times x) and (15 times 100)
This results in 30x = 1500.
Divide both sides by 30 which results in x = 50.
This means that there is a total of 50 penguins.
In the following example x = the number of Emperor penguins.
If you would like to double check this, set up as follows.
x over 50 = 30 over 100
Cross multiply the numbers. (30 times 50) (100 times x)
This results in 100x = 1500.
Divide both sides by 100 which results in x =1 5.
This means that there are 15 Emperor penguins.
Answer:
Step-by-step explanation:
How is this related to mathematics?
Medium takes one seventh as much as a large, one seventh of eight ninths pints of milk.
What is 1/7 of 8/9?
Answer:
y = 40x + 150
Step-by-step explanation:
He starts with 150.
150
He adds 40 per month. Let x represent months: so every x, he gets 40. With 2 x, he gets 80: so we multiply 40 and x and add that to his starting number.
150 + 40x
And let's represent his end amount of money with y, and set it equal.
150 + 40x = y
<u>For the other question:</u>
x = number of months
Bob = 150 + 40x
Andrea = 100 + 50x
100 + 50x > 150 + 40x
50x > 50 + 40x
10x > 50
x > 5
So starting month 6, Andrea will have saved more than Bob.
