Quarters make up what part of the group coins ? write the answer as a fraction in word form

What is the common difference in the following arithmetic sequence 7,3,-1,-5

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Anyone know these questions? i need ,.