Look at deonomators
assuming that the deonomenators are 5x+15y and 2x+6y
find their LCM
factor
5x+15y=5(x+3y)
2x+6y=2(x+3y)
LCM=10(x+3y)=10x+30y
multiply 2/(5x+15y) by 2/2=4/(10x+30y)
multiply 1/(2x+6y) by 5/5=5/(10x+30y)
if we add them
9/(10x+30y)
60% of the class is blonde
Answer: y=4x-23
Step-by-step explanation:
First multiply the 4 on the right side to make it y+3=4x-20. Then subtract 3 on both sides to get y=4x-23
Answer:

Step-by-step explanation:
Convert
to a decimal
Step 1. Reduce the fraction to its lowest terms.
Divide both numerator and denominator by their greatest common factor (12)

Step 2. Convert the denominator to a power of 10
Multiply both numerator and denominator by 2.

Step 3. Divide the numerator by the denominator
Dividing by 10 moves the decimal point one place to the left.

Answer:
30
Step-by-step explanation: