If two lines are perpendicular what statement must be true

12 is 33 1/3% of 36 what is the whole

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

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