Check your work here: 1)7/8. 7/8=0.875 and 3/4=0.75 2)3/20. 3/20=0.15 and 12.5%=0.125 3)48.4 increase by 10% means you multiply 44 by 100%+10% or 110% to get 48.4 4)612 decrease by 10% means you multiply 680 by 100%-10% or 90% to get 612 5)36,36,60 132/(3+3+5)*3,132/(3+3+5)*3,132/(3+3+5)*5 6)9.6,22.4 32/10*3, 32/10*7 7)20 14/0.7 8)31.5 18/4*7 9)17/12 2/3=8/12, 3/4=9/12 8/12+9/12=17/12 10)15/4 5*3/4 11)8 2^2+2*2=4+4=8 12)0 (-2)^2+(-2)*2=4-4=0 13)3 3(x-3)=0,(x-3)=0,x=3 14)2/5 or 0.4 5x+1=3,5x=2,x=2/5 15)5n+2 The sequence difference is 5 and the first term is 7 16)20 6(3)+2=18+2=20 17)-5 4(-2)+3=-8+3=-5 18)1 the coefficient of x is 1 19)4pi or 12.56 area of a circle is r^2*pi=2^2*pi=4pi 20)14pi or 43.96 circumference of a circle=2r*pi=2*4*pi=14pi
