Which answer has a correct first step for this system: 3x + 3y = 3 y = 3x + 5

A. Free sha vaca doo

B. The variable is already isolated for y, so we substitute it in the first equation and solve for x 3x + 3(3x + 5) = 3

C. The variable is already isolated for y, so substitute it in th second equation a solve for x y = 3(3x + 3y) = 3

D. The variable is already isolated so weve already solved the system​

Design a number line containing five (5) points2.benin, one of the smallest countries in africa, has a total area of 43,475 square miles. the population of the country was recently estimated at 10,160,555. about 3,657,790 people live in rural areas. the country has only about 870 miles of surfaced roads. a. round off the total population to the nearest hundred thousand people. b. round off benin’s area in square miles to the nearest thousand. c. round off the number of miles of surfaced roads to the nearest ten. d. round off the number of people who live in rural areas to the nearest million.

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

Hi, can anyone show me how to do this problem? 100 points for this. in advance