This is a trick question!

which expression has a value of 74?
(75 − 5) × 1 + 4
(75 − 5) × (1 + 4)
75 − 5 × (1 + 4)
75 − (5 × 1 + 4)

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

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