Tan^2⁡〖(x)〗+sec⁡(x)-1=0

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

cutt.ly/tz3yDpb

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

exa:

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3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.