Step-by-step explanation:
I sent you the picture above oncluding the steps.
In the equation given, just put the value of x and you will find the value of y.
I don’t really get your question, because you said that ¾ of them are girls, Then how many girls are working in the piano?
You did not stated the question well.
However, I will try to answer this base on my understanding.
There are a total of 12 students that works in the library.
IF ¾ of them are girls:
=> 12 / 4 = 3 *3 = 9
=> 9 of them are girls and 3 of them are boys.
Thus, how many girls are working in the piano.
The probability is 9, there might be 9 girls working in the piano, or less than 9. Since you did not mention how many girls worked in different part of the library.
Answer:
The numbers are x = 3 and y = 1. Therefore the value of xy is 3.
Step-by-step explanation:
In order to calculate the numbers we will simplify the equation, this is done bellow:
2*x + x(2^2) + (y*2^3) + (y*2^4) = 42
2*x + 4*x + 8*y + 16*y = 42
6*x + 24*y = 42
We can divide the whole equation by 6, so we have:
x + 4*y = 7
The only possible combination of numbers that are positive and integers that will make the equation valid is x = 3 and y = 1. Therefore he value of xy is 3.
Step 1. TUrn the second fraction upside down (it becomes a reciprocal)
5/2 becomes 2/5
Step 2. Multiply the first fraction by the reciprocal: (Multiply tops.)
2/5 1/4 = 1x6/ 2x1= 6/3 (multiply bottom)
Step 3. Simplify the fraction (if needed.)
6/3= 2
Example: dividing by 5/2 is the same as multiplying by 2/5 so instead of dividing by a fraction. It's easier to turn that fraction upside down, then multiply.