Given the triangle below, answer the following questions

a. what is the value of x?
b. what is the value of y?
c. what is the value of z?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

Subject: geometryneed with 6 and 7