Step-by-step explanation:
it it can be calculated by using the quadratic formula.
X=-b+_(√b^2-4ac)/2a
Solution: Let "m" be the number of marbles Santana has.
First he wants to give one-tenth of his marbles to his brother. That is:
He also wants to give 8 more marbles to his brother.
Therefore,
Santana wants to give
marbles to his brother

Multiply both sides by 3

Simplify the numerators

Multiply both sides by 6

Simplify the numerator

Multiply both sides by x
12x - 18 = 15x Subtract 12x from both sides
-18 = 3x Divide both sides by 3
-6 = x Switch the sides to make it easier to read
x = -6
Check your answer by plugging -6 in for the x in the original problem:

Plug in -6 for x

Change

to

so all denominators are the same

Change

to

for easier work

Subtract the numerators (4 - (-1) )

=

So,
x = -6 .
Answer:
60
Step-by-step explanation:
You get a 6 12 times out of the total 100 times. If you multiply that by 5, you get 60 times per every 500 rolls
Teresa is correct because he rode a 1/4 mile bike trail 8 times and if you simplify 8/4 miles it would be 2 miles