The population of the city of Miami is approximately 463,300 and is increasing at a rate of 3% each year. Use an exponential function to find the
population of the city after 7 years. Round to the nearest whole number.

9x

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated