Which equations are direct variation equations? select all that apply.
a. y = 3x
b. y = 7/x (fraction)
c. y = 5x2 ( five x squared 2)
d. y = x/9 (fraction)
e. y = .8x
f. y = 5/4x (fraction)
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Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

Now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Suppose jose bars 4 pounds of sausage that cost $8.79 per pound a bottle of mustard that cost $1.38 and two loaves of cuban bread that cost $3.99 each how much did jose spend in all