Answer:
a.
Step-by-step explanation:
12 and 18 is equal to 2/3
12 boys and 18 girls
the ratio from boys to girls is 2 to 3
12/2=6
18/3=6
both equal 6 meaning that both are proportional meaning that A is the correct answer
1/2
2/3 times 3/4 is 6/12, and 6/12 in simplest form is 1/2.
9
measure of angle 1
= 180° - 90° - 42°
= 48°
( 3 ) ( 7 ) − ( )
= 21 − ( )
=
Hope it helps
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