Answer:



Step-by-step explanation:
Given


Solving (a): (s + t)(x)
This is calculated as:


Collect like terms


Solving (b): (s - t)(x)
This is calculated as:


Collect like terms


Solving (b): (s . t)(1)
First, we calculate (s.t)(x)
This is calculated as:

So, we have:

Substitute 1 for x



Answer:
24 teachers
Step-by-step explanation:
136 ÷ 17 = 8
8 × 3 = 24
Answer:
a
Step-by-step explanation:
Adding 5 to 1346787654323567, you get 1346787654323572.
The rectangle with 6 rows has 30 people in the whole rectangle. The rectangle with 9 rows has 45 people.
6 x 5 =30
9 x 5 =45
30+45 =75 people