Which equation would you use to solve the following situation?

molly buys some concert tickets at $10 each. if she spends $90 on the tickets, how many did she buy?

90 -t = 10
10t = 90
10 + 90 = t
9t = 90

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

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.

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?