Find the expression that is the expansion of (2x + 1)(3x + 4). a 6x^2 + 3x + 4
b 6x^2 + 5x + 4
c 6x^2 + 7x + 4
d 6x^2 + 11x + 4

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

The graph of a curve that passes the vertical line test is a:

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels