Use a unit rate to find the unknown value of 18/? = 21/7

When benny’s sister penny is 24, benny’s age will be 125% of her age. how old is lenny? a) how old will benny be then? b)if benny is 12 years old now, how old is penny now? explain your reasoning.

How to write four times a number,minus 6,is equal to theee times the number+8 as an equqtion

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm