4. Verify the following for a = 3 and b = 4. a) (a + b)^2= a^2 + 2ab + b^2
b)(a + b)^2 = a^2 - 2ab + b^2
c) (a + b)(a - b) = a^2 - b^2​

Given the graph below state whether or not the relation is a function, and give the domain and range.

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.

Sioux co. replaced the roof on its existing building, therefore increasing the building's life by 10 years. the cost of the roof is considered a(n):