Answer:
1.a. not a function
1.b. function
1.c. function
1.d. not a function
1.e. not a function
1.f. not a function
Step-by-step explanation:
1.a.
The arrows from x to y show that the ordered pairs of this function are:
(1, 4), (1, 5), (0, 7), (1, 6), (2, 5).
Since the x-coordinate 1 is used in two different ordered pairs, (1, 4) and (1, 5), this relation is not a function.
1.b.
Each x-coordinate is used only once, so this relation is a function.
1.c.
All x-coordinates are different. Function.
1.d.
Two ordered pairs have the same x-coordinate. Not a function.
1.e.
Two ordered pairs have the same x-coordinate. Not a function.
1.f.
Two ordered pairs have the same x-coordinate. It does not pass the vertical line test. Not a function.
Three of given <u>lines</u> form a <u>triangle</u> with <u>measures</u> of two <u>interior angles</u>
and 
The angle with measure
is exterior angle of considered triangle.
The measure of exterior angle of triangle is equal to the sum of the measures of two not adjacent interior angles:

Answer: correct choice is D
Answer:
5.2776558e+14
Step-by-step explanation:

15, 30, 60

= 5.2776558e+14
hope it helps :)
mark brainliest!
Answer:
its 2242.81
Step-by-step explanation:
2.5 (pp. 109-111). 5. y = ax. -21 = a(6). (2,-2) f(x) = -X-1 ... [31 + 25 42 + 36 18+ 127_[56 78 307 ... A = Pert = 2000€(0.04)(5) = $2442.81.