Answer:
D, irrational numbers,
Step-by-step explanation:
75 is part of all groups except irrational numbers, it is an integer, a whole number and a natural number..
Answer:
x = 4.5
Step-by-step explanation:
there's definitely other ways to solve this, but I used a proportion.

Then you can make this equation:
14x = 3.5 * 18
I solved for it and got 4.5 .
2(3)+2(5)=6+10 P=16 P=12 is false
Answer:
y=-3
Step-by-step explanation:
"varying directly" means there is only a factor between x and y, i.e.:
y = k·x
so k = y/x = -1/3
so if x=9, y = -1/3·9 = -3