Answer:
Marc's age is 12
Step-by-step explanation:
Let
x ----> Marc's age
y ---> Tony's age
z ---> Ben's age
we know that
the sum of their ages is 40
so
-----> equation A
Marc is half as old as Tony
so
----> equation B
Marc is three times as old as Ben
so
----> equation C
substitute equation B and equation C in equation A
solve for x
therefore
Marc's age is 12
Answer:
0.35
Step-by-step explanation:
3 over 5 = 0.6
0.6 times 7 = 4.2
4.2 over 12 = 0.35
Answer:
28.137 sq. units.
Step-by-step explanation:
Area of a regular hexagon is
where, a is the side length.
It is given that the side length of the regular hexagon is 
.
Substitute 
in the above formula.
Therefore, the area of regular hexagon is 28.137 sq. units.
Answer:
57
Step-by-step explanation:
the sum of those two interior angles is equal to the exterior (116), so y = 15 and the measure of angle A is 57 if you plug it in
