Answer:
800-80w.
800-80(2)=800-160=640 left in 2 weeks.
800-80(3)=800-240=560
800-80(5)=800-400=400
800-80(7)=800-560=240
800-80(10)= 0. She has 10 weeks until all of her money is gone
Function: 800-80w
Range: 460
knowing the answer is between 3 & 4 plug those as x and see what you get for answers than adjust the number accordingly
3^3+2(3) = 33 so its higher than 3
4^3 + 2(4) = 72 so it is lower than 4
try the middle so try 3.5
3.5^3 + 2(3.5) = 49.875
question states use 1 decimal place so now try 3.6
3.6^3+2(3.6) = 53.856
3.5 is closest
D. 1057 is not prime... It is divisible by 7!
Brainliest answer plz!
