Ethan correctly answers 80% of the total questions on his history test. he correctly answers 32 questions. what is the number of questions on ethan's history test?

How are sas and sss used to show that two triangles are congruent?

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document