Answer:
9
Solution:
Write it in an algebraic form (x is your number)
2x-11=7
Now solve
2x=7+11=18
X=18/2=9
Answer:
k = 63
Step-by-step explanation:
3 x 21 = 63
-3(c-10) + -4= 2
-3c+ 30+ -4= 2
-3c + 26= 2
-3c= -24
C= 8
A prime number<span> has only two factors: 1 and itself. A</span>composite number<span> has more than two factors. The</span>number<span> 1 is neither </span>prime<span> nor </span>composite<span>. The </span>prime numbers<span> between 2 and 31 are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 and 31 since each of these </span>numbers<span> has only two factors, itself and 1.</span>