Answer:
9
Step-by-step explanation:
9x8=72
9x9=81
Answer:
B is the correct graph
i dont know how to explain tho :/
Answer:
x=4
Step-by-step explanation:
the triangles are directly porportional.
if 2.5 is half of 5, to find x is just half of 8.
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:
y=-5
Step-by-step explanation:
-10/2=2y/2
-5=y
y=-5