PLZ HELP 30 POINTS PLZ INCLUDE EXPLANATION

m = 0

Step-by-step explanation:

1/2(-1.4m+0.4)=m+0.2

We move all terms to the left:

1/2(-1.4m+0.4)-(m+0.2)=0

Domain of the equation: 2(-1.4m+0.4)!=0

m∈R

We get rid of parentheses

1/2(-1.4m+0.4)-m-0.2=0

We multiply all the terms by the denominator

-m*2(-1.4m+0.4)-(0.2)*2(-1.4m+0.4)+1=0

Wy multiply elements

-2m^2(--(0.2)*2(-1.4m+0.4)+1=0

We use the square of the difference formula

-2m^2(+(0.2)*2(-1.4m+0.4)+1=0

answer: 12

step-by-step explanation:

because yes

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answer: d.) the total number of protons and neutrons is 15

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