Answer:
Step-by-step explanation:
Answer:
Order 5 pizza's. There is
1
2
a pizza left so someone gets an extra portion! Or it is split evenly!
Explanation:
No matter how you present this, the underlying principle is that of ratio.
If each pupil gets
1
4
of a pizza the 1 pizza feeds 4 students.
So the ratio of
pizza count
Student count
→
1
4
Need to have sufficient pizza for 18 students. The ratio will be constant so we have:
Let the count of pizzas be
p
pizza count
Student count
=
1
4
=
p
18
So we now have:
p
18
=
1
4
Multiply both sides by
18
giving:
18
×
p
18
=
1
4
×
18
18
18
×
p
=
18
4
But
18
18
=
1
p
=
18
4
=
4
1
2
You can not order
1
2
a pizza so the total pizza count is 5
The fourth one or the second one on the bottom
Just distribute -5
30u+15x-20
Don’t forget to change negative signs to positive signs if their multiplied by negatives
84(1/7)+9(1/3)
The 84 is divided by the 1/7th and the 9 is divided by the 1/3. They are then added.
