Find the length of side cif a = 3 m and b = 7 m

Josephine has a great garden with and area of 2x2 + x - 6 square feet

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

Solve the following system algebraically. y = x2 – 9x + 18 y = x – 3 a. (3,1) and (5,3) b. (3,0) and ( 4,2) c. (–4,5) and (7,–10) d. (7,4) and (3,0)