\dfrac {15}r-1 r
15

−1start fraction, 15, divided by, r, end fraction, minus, 1 when r=5r=5r, equals, 5

Abcd is a parallelogram find the valuse of x

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?