Solve the system by substitution.

y = 2x
3x + 2y = 21
a.
x = 3, y = 6
b.
x = 6, y = 3
c.
x = 3, y = –6
d.
x = –6, y = 3

After applying the composition r0.90 ry to rs what are the coordinates of r' and s'? a. r'(–3, 1),  s'(–3, 5)b. r'(–1, 3),  s'(–5, 3)c. r'(1, 3),  s'(5, 3)d. r'(5, 3),  s'(1, 3)

Aresearch group wants to find the opinions’ of city residents on the construction of a new downtown parking garage. what is the population of the survey downtown shoppers downtown visitors downtown workers city residents

Which two undefined geometric terms always describe figures with no beginning or end?