Answer:
P = 12 + 5x
Step-by-step explanation:
P = a + b + c
P = 7 + (x + 4) + (4x + 1)
= 7 + x + 4 + 4x + 1
= 12 + 5x
Answer:
30 out of 40: 75%
40 out of 50: 80%
40 out of 50 is the better score
There isn't a picture of a pattern to go by.
If its 21 inches then rounding to the nearest who should be 21 inches