Membership Fee $25
$3 Per Session
What is the cost for a member who uses the center 10 times?

someone hel

$55

Step-by-step explanation:

y=3(10)+25

y=30+25

y=55

$55

Hope this helps :-)

$55.

Step-by-step explanation:

The Membership Fee is a flat fee (one-time charge) of $25.

It also costs the member $3 each time they use it to enter into the center.

It is given to us that the member entered 10 times.

Set the equation:

Total cost (t) = 3x + 25

Let: t = total cost

      x = # of times entered. = 10

Plug in the corresponding numbers to the corresponding variables:

t = 3(10) + 25

Remember to follow PEMDAS. First multiply, then add:

t = 30 + 25

t = 55

First you cross multiply
n x (n+1) =210
Then you open up the brackets
n^2 +n=420
n^2 + n -420 =0
Because -20 x 21= -420
And 21-20=1, 21 and -20 have become the roots of this equation.
(n^2 + 21n)(-20n -420)=0
Factorise
n(n+21) -20(n+21)
(n+21)(n-20)
n+21=0, n-20=0
n=-21, n=20