I may or may not be dumb in the brain... I'll give brainliest to whoever answers first and correctly.

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

Drag each expression to the correct location on the solution. not all expressions will be used. consider the polynomial 8x + 2x2 - 20x - 5. factor by grouping to write the polynomial in factored form.

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25