Andy's phone plan charges $0.45 per text messages plus $2.25 a day. jeff's plan charges $0.20 a text plus an additional $3.50 a day. for what number of texts a day are the costs of the phone plans the same?
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Tom and maria typed in words in the ratio of 1 : 5 in 20 minutes. they typed 864 words altogether. find the number of words that each of them typed

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.