Answer:
b is correct
Step-by-step explanation:
Let X be the variable used to represent the expression of the total number of books that Mario has read.
We used 4X to represent "four times the number of books". Then we add -2 to interpret the words "for two less than".
Therefore, we have an expression of 4X-2 for the total number of books that Mario has read.
Answer:£31.55p
Step-by-step explanation:
£4.90x6=£29.40p
£29.40p+£2.15p=£31.55p
Answer:
4
Step-by-step explanation:
(19-5)/3.5
14/3.5
4
Answer:
x = ±4 (x = 4 and x = -4)
Step-by-step explanation:
4x²-16 = x²+32
3x²-16 = 32
3x² = 48
x² = 16
x = ±4
Therefore, x = 4 and x = -4
