In a race, 49 out of the 50 swimmers finished in less than 49 minutes. What percent of swimmers finished the race in less than 49 minutes? Write an equivalent fraction to find the percent.
49x
50 x
100

For the given quadratic equation convert into vertex form, find the vertex and find the value for x=6 y=-2x^2+2x+2

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?