300,000,000 is 3 x 10 to the 8th power
I’m not sure is D , I’m clueless
1675/3890 you are dividing 1675 by 3890 so it equals 0.43059...=0.4 simplified to the first decimal
group the 1st 2 terms and last 2 terms:
(Z63 -2z^2) + (9z-18)
factor out GCF:
z^2(z-2) + 9(z-2)
now factor the polynomial:
(z-2) (z^2+9)
Let the number be x
The sum of 2 equal numbers is simply x+x or 2x.
