The frequency of the musical note c4 is about 126.63 hz
what is the frequency of the note one octave above c4
choices
987.76 hz
740.82 hz
253.26 hz
246.94 hz

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%