You can solve <span>9/x-4/y=8 for x or for y but NOT at the same time.
Solving for x: </span><span>9/x-4/y=8 Mult all 3 terms by xy to eliminate the fractions.
9(xy)/x - 4xy/y = 8xy => 9y - 4x = 8xy, or 9y = 4x + 8xy = 4x(1+2y)
then 9y = x [ 4(1+2y) ]
9y
therefore x = ------------
4(1+2y)
Solve for y using a similar approach.
</span>
54+x=12+3x
X=21 =number of classes
Total amount she will pay is $75
Answer: 5x+12.50=62.50
5*12.50=62.50
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
because the square root of 3 is 1.7 and B is the closest to that.
