Use the linear combination method to solve the system of equations.
–2.1x + 4y = 5.3 2.1x – 5.5y = –0.2
what is the solution to the system?

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

What is the standard form of -5x^2+2x^4-11+x^3+3x

The label on the car's antifreeze container claims to protect the car between ? 40°c and 125°c. to convert celsius temperature to fahrenheit temperature, the formula is c = 5 over 9 (f ? 32). write and solve the inequality to determine the fahrenheit temperature range at which this antifreeze protects the car. ? 40 > 5 over 9 (f ? 32) > 125; ? 40 > f > 257 ? 40 < 5 over 9 (f ? 32) < 125; ? 40 < f < 257 ? 40 < 5 over 9 (f ? 32); ? 40 < f 5 over 9 (f ? 32) < 125; f < 257