Answer: perpendicular lines
Step-by-step explanation:
look up "Two straight lines that intersect at a right angle"
Answer:
What expression?
Step-by-step explanation:
By drawing the hypotenuse of the shape.
Answer:
(A)74
Explanation:
Let her average score on the last two tests = x.
The six scores will now be: 82,78,87,73, x and x.
Since the average score for her first six chemistry tests = 78

We then solve for x.

Her average score for the last two tests is 74.
Answer:
Step-by-step explanation:
hmmm