Just multiply the two numbers, then add a negative sign.
2 x 3 =6
3 x 1 =3
6/3=2
2/3 x -3 = -2
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hope it helps
Remember
area=pir^2
circumference=2pir
the surface aera if you thinkg about it is
2 times the tops+area around
the tops are circles so 2*pir^2 is tops
the area around is a rectangle that has been wrapped around the cylinder,
the hieght is the legnth and the circumference is width
so 2hpir is the area around
2pir^2 is the areas of the tops
2hpir is the area around
5 and 6: multiply f(x) by g(x) or in other terms multiply (8x^2) by (2x+8)
7: the answers should be the same however i'm assuming this is Algebra 2 and have never seen the second part of the question before
hope this helps