My remainder is 8. My dividend is 80. I am a 1- digit number. What divisor am I?

The divisor is 9.

Step-by-step explanation:

a) Data and Calculations:

Remainder = 8

Dividend = 80

Number divided evenly without remainder 8 = 80 - 8 = 72

72/9 = 8

b)There are four main numbers under the divisional mathematical rule.  The first number is the dividend which is the number 80 that is being divided by the divisor.  The divisor (9) is the number that divides 80.  The quotient (8) is the result obtained by the division, while the remainder 8 is the number left over after the division.

the circle one

51

step-by-step explanation:

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