Answer:
960
Step-by-step explanation:
We start with the variable "x". Let's call "x" Raina's penny bank.
After adding 360 pennies, at the end, she has 5/8x, or 5/8.
So we start with
(1/4)x + 360 = 5/8x
Let's subtract 1/4x from both sides
360 = 5/8x - 1/4x
Remember, we need to use common denominators to subtract, so 1/4 becomes 2/8
360 = 5/8x - 2/8x
Now we simplify to get
360=3/8x
Multiply the reciprocal of 3/8 to both sides which is 8/3
360 * 8/3 = x
Answer is 960 pennies.
Therefore Raina's bank hold 960 pennies.
Answer:
20%
Step-by-step explanation:
just took test plz mark as brainliest
A:
Ratio of all students in the class to girls is...
15:8
b:
Ratio of boys to girls....
7:8
21 over 50 is
21/50.
The same thing, just put 21 on top, a line under it, and below that line, put the 50
Boys: x
gilrs: y
From the text of the task:
Replacing x:
So there are 28 girs and 20 boys
