Is that british currency
or is ut a diffrent country
P=25T... I hope this helps
Answer:
45
Step-by-step explanation:
Let the first term be a and the common difference be d.
So -18=4a+6d and -9=6a+15d. Solving this we get a=-9 and d=3.
So the sum of first 10 terms is 5*(2*(-9)+9*(3))=45
If there is one question, the exam can have one unique order.
If there are two questions, the exam can have two different orders
If there are three questions, the exam can be arranged in 3*2 = 6 different orders
If there are four questions, the exam can be arranged in 4*3*2 = 24 different ways.
Then she needs five questions, which permit to order them in 5*4*3*2 =120 different ways.
Answer:
6.49
Step-by-step explanation:
Hope this helps!
