Question

Plz help me 75 points for the 2 questions!!!

Answer 1

#1

The system of equations:

• 2x + 7y = -11
• 3x + 5y = -22

Solve by elimination.

Triple the first equation, double the second one, subtract the second from the first and solve for y:

• 3(2x + 7y) - 2(3x + 5y) = 3(-11) - 2(-22)
• 6x + 21y - 6x - 10y = -33 + 44
• 11y = 11
• y = 1

Find x:

• 2x + 7*1 = -11
• 2x = -11 - 7
• 2x = -18
• x = -9

The solution is:

• x = -9, y = 1

#2

Simplifying in steps:

• 8u - 29 > -3(3 - 4u)
• 8u - 29 > - 9 + 12u
• 12u - 8u < -29 + 9
• 4u < -20
• u < -5