Which inequalities are equivalent to n+ 15 < 22? select three options.
n+ 15-15 < 22-15
n+ 15 < 22-15
n+15-22 < 22-22
n+15+6< 22+6
n+ 15-22 < 22

sorry i need the points

step-by-step explanation:

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5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

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

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