Answer:
Suppose 3 consecutive integers are X-1,X,X+1
Step-by-step explanation:
Sum = X-1+X+X+1= -78
3X=-78
X= -78/3
X= -26
3 consecutive integers are, -27, -26,-25.
smallest integer is -27
Answer:
m = 5
Step-by-step explanation:
.........................
7P3= 7!/(7-3)!
= 7!/4!
= 7*6*5
= 210
C.210
Answer:
A.
Step-by-step explanation:
We are told that three that the sum of 5 and a number is between 12 and 21 which means:

Divide all sides by 3:



Subtract 5 on both sides:

Simplify:

So the answer is A.
Slightly different route:

Distribute 3 to the terms in the ( ) next to it:

Subtract all sides by 15:

Simplify:

Divide both sides by 3:

Simplify:
