Answer:
20% increase in expenses
Step-by-step explanation:
Since 120 is bigger than 100, the money spent will increase.
120 / 100 = 1.20
That is 20%.
An arithmetic sequence can be expressed as explicitly or recursively
The explicit formula of the sequence is 
<h3>How to determine the explicit formula</h3>
The recursive formula is given as:


Substitute 2 for n in 

This gives


Calculate the common difference (d)



The explicit formula is then calculated as:

This gives

Expand


Hence, the explicit formula of the sequence is 
Read more about arithmetic sequence at:
brainly.com/question/6561461
1. In order to buy their father's gift, John has put in $10 and Patricia has put in 3 times as much money as John. How much money has Patricia put in? (Answer: $30)
2. At the shop, pencils are $2 each. Chloe wants to buy 12 pencils. How much does it cost altogether?
(Answer: $24)
The x value will change to y avlue and vice versa
so x---> y and y---> x
(x,y) --> (y,x)
B
Answer:
a. X=7,-7 b. x=10,-20
Step-by-step explanation: