Answer:
Expression : 300,000 + 7x% = a
a = 384,000
Step-by-step 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
No
Do they have common factors?
No which is why they are not able to be simplified further
so no
No, more than one hamburger was sold
