Answer:
1st row =-4
2nd row = 2,-2(from left)
3rd row= -2,-1,2
4th row= -2,1,-1,-2
5th row = 2,-1,-1,1,-2
Sarah purchased 2 first class tickets, and 5 coach tickets. This is the answer because $2640- $1020-$1020=$600, and $600÷5=$120.
The largest number of caps Laura can purchase is 162.
x(number of caps)6 + 25 = c (cost)
(162)6 + 25 = 997
972 + 25 = 997
Hope this helps! <3
The expanded form of 9,540,000 is:
9,540,000 = 9000,000 + 500000 + 40000 + 000 +00 + 0
we can also write it as :
9,540,000 = 9 x 1000000 + 5 x 100000 + 4 x 10000
and using exponents as power of 10 is:
9,540,000 = 9 x 10⁶ + 5 x 10⁵ + 4 x 10⁴
The wall can be built in 22 days by 6 workers in first 6 days and 9 workers in the rest of time.
<h3>How to use inverse proportionality to determine building time of a wall</h3>
In this question we must use the definition of <em>inverse</em> proportionality, in which the number of workers (
), no unit, is inversely proportional to the <em>building</em> time (
), in days.
According to the statement, 6 workers spent 6 days building a wall and there are 24 days left for completion, but 3 more workers entered to reduce building time, which can be represented by the following expression:


In this scenario, the wall can be built in 22 days. 
To learn more on inverse proportionality, we kindly invite to check this verified question: brainly.com/question/4838941