why 5300000000 can be written as 5.3 x 10^9
x(-7-2x)=3
.2914591
.2930798
.2930423
9250.763
.3181965
.2925461
.2719224
231825.0904
.2727139
.11463161
.14777...
(1/7)x+4/7
.14777882
.6225296.01...
[(x-6)(x-1)]+4(-x+3)
-9/10k=72
-25=5/6r
-32 = -4/3s
