PLEASE HELP THIS IS ALL IT GIVES ME I HOPE YOU COULD DK THE ANSWER WITH JUST THIS BUT PLEASE I NEED HELP ​

f (3) = 21

Step-by-step explanation:

To answer, we know that x in f (x) equals 3, so in f (x) = 7x, we simply substitute x with 3:

f (3) = 7 (3)

Now multiply:

f (3) = 21

21 is your answer

Hope this helps :)

an altitude of 15,000 feet

step-by-step explanation:

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.