Let's represent the numbers by : x, x+1, x+2, x+3
x+x+1+x+2+x+3=40 The third number in the sequence is x+2
4x+6=40 8.5+2=10.5
4x+6-6=40-6 Therefore the third number in the sequence is
4x=34 10.5
4x/4=34/4
x=8.5
ANSWER: y=7x-5 i put it in a graphing calculator
1.45 x 10^-7 isn't in scientific notation because if it's negative, the decimal starts before the first real number, right?
