Answer:
9
Step-by-step explanation:
(9*3) = 27 which is 20 more than 7
Prime numbers are only divisible by 1 or itself; the first few are are 2, 3, 5, 7, and 11.
Answer:
x = 4 or x = -3
Step-by-step explanation:

Take square both the sides,

x² - x - 12 = 0
x² - 4x + 3x - 3*4 =0
x*(x - 4) + 3*(x - 4)= 0
(x- 4 )(x+3) =0
x -4 =0 or x + 3 = 0
x = 4 or x = -3
Answer:
21/4
Step-by-step explanation:
(5 * 4) + 1
20 + 1
21/4