Question

the popularion of a city increases by 7% every year. if its population today is 300,000, what will its population be in 4 years. Write as an expression.

Answer 1

Expression : 300,000 + 7x% = a

a = 384,000

Explanation:

a = population in 4 years

x = every year increased

Expression: 300,000 + 7x% = a

300,000 + 7x% = a

replace x what will its population be in x years variable (this is 4)

300,000 + 7(4)% = a

multiply 7(4)

300,000 + 28% = a

Add 28% of 300,000 to 300,000

384,000 = a