It's C, just look at where the points are.
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>
Answer: c)
Step-by-step explanation:
This can be done through trial-and-error. Use the pythagoreas' theorem 
and if the left side of the equation is equal to the right, that is the answer.
(Do take note that c is the longest side.)
a)
Since 
, a) is wrong.
b)
Since 
, b) is wrong.
c) (answer)
Since 
, c) is correct.
d)
Since 
, d) is wrong.
Answer:
A beach ball is a sphere, so we will need to know how to find the volume of a
sphere. V = 4Pi * (r ^ 3 / 3)
We have the diameter, but not the radius. To find the radius, it is half of the
diameter.
10÷2=5 Now let's plug it in.
4T(5³/3) Let's solve.
4pi = 12.56
5³= 125
125÷3= 41.67 (repeating 6) 41.67x12.56=523.3752
523.33 cubic inches is the volume of
air contained inside the beach ball. The reason I picked that answer is because a repeating 6. So we should expect for
we rounded up to 41.67, when there was
the answer to be a couple decimals lower
from the answer we got. Tell me if this helps!!
