Please help! I'm not really sure how to do this, so if possible, please explain

11

Step-by-step explanation:

First lets fill in the function j(x)=-4/5*-5+7 now we can solve according to order of operations. -4/5*-5/1=-20/5=4

J(x)=4+7=11

                         Multiplied -5 as a fraction so it was easier

i would be 2,000 just get the square root of 50 which is 2500 and the divid 4/5 and last thing multiply the answer you get for that by the square root of 50

step-by-step explanation: