John has a total of 15 bills in his wallet. They are either 5-dollar bills or 10-dollar bills. The total of all the bills is $115.Which system of equations can be used to find the number of 5-dollar, x, and the number of
10-dollar, y, bills that he has in his wallet?

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

chiken

step-by-step explanation: