Answer:
(-2+4)/2
= 1
(-4-8)/2
= -6
(1,-6) is the midpoint of the line
Step-by-step explanation:
We have been given that David, Egil and Frances share money in the ratio 2:7:9.
Let 2x, 7x and 9x be the amounts of money that David, Agil and Frances get respectively.
We are told that Frances gets $80 more than David. So we can write this information in an equation as:

Now let us solve for x.


Now let us substitute
in 7x (amount of money that Egil gets).

Upon cancelling out 7 from numerator and denominator we will get,
Therefore, Egil will get $80.
D. the triangles are similar by the SSS similarity theorem.
The true statement is - The matrix is square.
Option: C.
<u>Step-by-step explanation:</u>
The given matrix is represented as the flight times between cities in hours.
The rows are cities of departure and the columns are city of arrival.
But any of the given statements doesn't relatable to the given matrix, except the given matrix is a square.
Any matrix can be considered as square when it has equal number of rows and columns.
i.e. A m by n matrix has m=n.
where m is the number of rows and n is the number of columns.