A phone company charges a base fee of $25.00 per month plus and additional charge per minute. The
monthly phone cost C can be represented by this
equation: C = 25 + am, where a is the additional
charge per minute and m is the number of minutes
used,
Which equation can be used to find the number of
minutes a Customer used if we know a and C?

c-25/ m

hope that helps

Step-by-step explanation:

Algebreic manipulation, watch Khan acadmy.

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584