Factor the following expression using the GCF: 2dr – 4r. r(2d – 4)
2r(d – 2)
2(dr – 2r)
2r(d – 1)

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15