Simplify the following expression: (5x2 + 3x + 4) − (2x2 + 5x − 1). if the final answer is written in the form ax2 + bx + c, what is the value of a?

numerical answers expected!

∆red ≅ ∆ by rule will give brainiest if possible

Usan threw a softball 42 yards on her first try and 5112 yards on her second try. how much farther did she throw the softball on her second try than her first? express your answer in feet and inches. 9 ft 12 in. 28 ft 12 in. 28 ft 6 in.

Use matrices to solve this linear system: 5x1 − 2x2 = −30 2x1 − x2 = −13 x1 = x2 =