12 + 3 = 15
12 is a composite number. A composite number is when more than two factors fit in the number. like 1,12,6,2,4 and 3 fit in 12 that is more than 2 factors. So its not a prime
X/(-3) = X + 12 X = -3X -36 4X = -36 X = -9
15
The algebraic expression for "3 more than a number" can be written as x + 3, where x represents the unknown number. In this expression, the variable x is being increased by 3. This expression can be simplified further if needed, but the basic form is x + 3.
28 7, 4, 2
4n+3 = 15 15 - 3 = 12 4n = 12 12 / 4 = 3 (3 X 4) + 3 = 15
n = number. (3/7)n + 12 ========
15 more than -3 = 12
9+(x/4)=12 x/4=3 x=12
It is D because: 6+2*3 = 12
only 2516 and 36 also have an odd number of factors, but both of those have more than 3.
All composite numbers have more than 2 factors. The factors of 12 are 1, 2, 3, 4, 6, and 12, and this proves that 12 is a composite number.