
Notice that the second row is half the first, so the rows are dependent. This means there are infinitely many solutions to the system.
69:
I know for a fact it can't be (B).
The answer is (A).
Reason: 6 times 9 is 54.
70:
13 is change to 15
13 plus 2 is 15
17 plus 2 is 19
I am 100% sure for question 69, but for question 70 im 100% unsure.
She bought it at a 15% discount because 15 percent of 40 is 6 and 40-6=34
Answer:
d= -5
Step-by-step explanation:
The slope of a line is found by finding the ratio of change is y values to change is x values

The points on the line have coordinates at: (-1,7) (-3,d)
where ;

Applying the formula with values as;

The value of d = -5
The coordinates of the points (-1,7) (-3,-5)
Answer:
2 1/2 hours
Step-by-step explanation:
Divide 100 by 40 and you get 2.5