Solve the system of equations using substitution.
y = 4x + 6
y = 2x
a. (6, 3)
b. (-3, -6)
c. (3, 6)
d. (1, 2)

Match each expression with its simplified form.

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

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left