Answer:
15.
Step-by-step explanation:
15 is composite because 3 * 5 = 15.
The others are prime.
Answer:
a=-6
Step-by-step explanation:
4= 6/a + 5
Subtract 5 from each side
4-5= 6/a + 5 -5
-1 = 6/a
Multiply by a on each side
-1*a = 6/a *a
-a =6
Multiply by -1
a= -6
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Add it together. You find area with base times height!!!
