Is my answer right can you check my answer we have to use dividend, divisor, equation, fraction, and quotient

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers