Answer:
Step-by-step explanation:
.
The formula for percentage is:
is/of = %/100
In the given problem,
is = ?
of = 25
% = 80
We get,
?/25 = 80/100
"is" is unknown so let "is" be "x"
x/25 = 80/100
We have to cross multiply. Meaning, we will multiply the numerator of one fraction by the denominator of the other fraction. Therefore,
100x = (80)(25)
100x = 2000
x = 20
The answer is 20. The basketball player is expected to make 20 free throw shots out of 25 in the entire game.
8x - 3 = 15x + 18
First, subtract 8x from both sides. / Your problem should look like:
Second, simplify 15x + 18 - 8x to 7x + 18. / Your problem should look like:
Third, subtract 18 from both sides. / Your problem should look like:
Fourth, subtract -3 - 18 to get -21. / Your problem should look like:
Fifth, divide both sides by 7. / Your problem should look like:

= x
Sixth, simplify

to 3. / Your problem should look like:
Seventh, switch sides. / Your problem should look like:

Answer:
x = -3
Combine like terms
a^2-4a^2=-3a^2
7a^3+11a^3=18a^3
Then put them back together from greatest exponent to smallest exponent
18^3-3a^2-a