Each X and Y in the equations don't have a number in front of them so they are all considered 1.
D = 1*(-1) - 1*(-1) = -1 -1 = -2
The answer is -2
Well based on this information, I don't think that this is a valid inference. There isn't enough data to go off of in order to answer this question.
Answer:
A
Step-by-step explanation:
there could be no red cards inside
New secured 4.5 is the best option
Answer: 620
Step-by-step explanation:
$40 x 5.5 hrs = $220 This means that she earned $220 tutoring the first student.
$40 x 10 hrs = $400 She earned $400 tutoring the second student.
$220 + $400 = $620 She earned $620 in total that week.
