(17-12)+4×7 =?

please xplain how you got the answer

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Which of the following transformations will make coincide with ? a. counter-clockwise rotation 90º about a, followed by a translation 5 units to the right b. translation 5 units to the right, followed by a reflection across the y-axis c. translation 5 units to the right, followed by a reflection across the x-axis d. translation 1 unit up and 5 units to the right, followed by a reflection across the x-axis

Sections of prefabricated woods are each 5 1/3 feet long, how long are 7 1/2 sections placed end to end?