Answer:
v = -1
Step-by-step explanation:
-4 (-3 + 7v) = -7v + 33
12 -28v = -7v + 33
-12 -12
-28v = -7v + 21
-28v + 7v = 21
-21v = 21
-21÷-21 = 21÷-21
v = -1
I need the answers to know which is correct
Answer:
Step-by-step explanation:
To prove a quadrilateral a parallelogram we prove,
1). Length of opposite sides are equal.
2). Slopes of the opposite sides are same.
Length of AB =
=
=
Length of BC =
=
Length of CD =
=
Length of AD =
=
Therefore, AB = CD and BC = AD (Opposite sides are equal in length)
Slope of AB =
=
= -1
Slope of BC =
= -3
Slope of CD =
= -1
Slope of AD =
= -3
Slope of AB = slope of CD and slope of BC = slope AD
Therefore, AB║CD and BC║AD
Hence ABCD is a parallelogram
I believe you just multiply the number of students by the number of students in each combination
30*6= 180 combinations