Acell phone plan charges $39.95 a month plus 15 cents
per text message sent and 15 cents per text message
received. using sto represent the number of text
messages sent in one month and rto represent the
number of text messages received in one month, the
following equation can be used to calculate the total
monthly cost, c.
c= 39.95 + 0.15(s+ r)
if it is known that the total monthly cost is $53.45 and 63
text messages were received, solve for s, the total
number of text messages sent.

What does x = in this equation x+3+2x=x+5

Solve the system of equations y= 3/2 - 1, -x+ y =-3

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.