Answer:
He should have got 40
Step-by-step explanation:
680 / 45 = 15.11
45 x 16 = 40
With what? I don't see a question
Answer:
35 questions are worth 4 points and 3 questions are worth 20 points
Step-by-step explanation:
I used guess and check
Check: 35 x 4 + 3 x 20 = 140 + 60 = 200, which means this is correct
Answer:
y = 0
Step-by-step explanation:
A parallelogram is a quadrilateral with opposite sides parallel. Then segment CD must be parallel to AB, and CB must be parallel to DA. Two different segments are parallel if they have the same slope.
slope of DA = (yA - yD)/(xA - xD) = (4 - 2)/(1 - (-1)) = 1
slope of CB = (yB - yC)/(xB - xC) = (2 - yC)/(1 - (-1)) = 1
(2 - yC) = 2 * 1
2 - 2 = yC
0 = yC
Note: coordinates of A are (xA, yA), of B are (xB, yB), of C are (xC, yC) and of D are (xD, yD)
