30 !! the triangular region shows the number of possible trees, x, and the number of possible shrubs, y, that can be planted in a park. the ordered pairs represent a possible combination of trees and and shrubs that can be planted in the park. which ordered pairs make sense in the context of the situation? select each correct answer. (12,5) (8,3) (9,6.5) (3.5,7) (5,8)

5,8,  3.5,7

Step-by-step explanation:

45 degrees

Step-by-step explanation:

Let the angle to be solved be

x

Let the supplement/compliment by

y

x+

y=90

Complimentary angles add up to 90 degrees.

x+3

y=180

Supplementary angles add up to 180 degrees, the other angle is thrice the other compliment.

Evaluating this as a system:x+y=90 Isolate x:x=90−y Input into the other equation:(90−y)+3y=180Combine like terms, isolate y and its coefficients:2y=90 Isolate yy=45 Input into the first equation:x+45=90 Isolate x:x=45 degrees