Tell whether each equation has no solution, one solution, or infinitely
many solutions.
a. 1 + 3x = 3x + 1
b. 4x + 1 = 3x + 2
C. 5x + 1 = 5x – 2
d. -3(x + 1) = -3x + 3

Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?