Answer:
C.
Step-by-step explanation:
A triangle has a full measure of 180° and a right triangle has a 90° angle so you add 90° (C) plus 48° (A) and then subtract it from 180° and you should get 42° :)
Answer:
a>option B
b>option C
c>option B
d>option C
e>option A
Step-by-step explanation:
the resons are well defined in the options
Answer:
Number of coins.
Step-by-step explanation:
You mean quantity?
The amount of or number of items (in this case coins).
Answer:
3 adult tickets and 4 child tickets
Step-by-step explanation:
a + k = 7
a = 7 - k
12a + 9k = 72
12a + 9k = 72
12(7 - k) + 9k = 72
84 - 3k = 72
84 - 3k = 72
3k = 12
k = 4
a = 3