Simplify the expression
3. 9a- b-2a-10b
a. -7a+ 11b
b. 11a + 9b
c. -11a - 9b
d. 7a - 11b

4. 5(x + 10) + x
a. 6x + 15
b.5x + 15
c. 6x + 50
d. 4x - 50 me

Ineed with this. the figure is made up of a square and a rectangle. find the area of the shaded region.

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .