Hey help it’s due tmr

How do you convert 1.27 to a percentage

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

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