A city has 5 new houses for every 7 old houses. If there are 45 new houses in the city, how many old houses are there?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities