C. 10r-3
Because 2r+5=7, the minus 6 and 7 which gives you 1 then minus 4 and 1 witch is 3 then you do 10r-3 and it will get you to 2r+5=7 again. I hope this helped!
Cram cramming all the info is your only hope...or cheat
812
Convert 45% into a decimal
45% = 4.5
Multiply 560 by 4.5
560 • 4.5 = 252
Add 252 to 560
560 + 252 = 812
Hope this helps :)
Remember PEMDAS, you have to simplify the exponent first.
