The third piece is 59 cm long.
Add the first two pieces up. 7+34= 41. Since the whole stick is 100 cm long, subtract 41 from 100 to find the length of the third piece. 100-41=59.
1.05,
look at the numbers on the right side of the decimal point. The lowest number will be your answer
The unit price is $1.23 (I think!!)
x = 1 because -7(3x + 4) must be -49 so 3x + 4 must me 7 so x = 1