Answer:
x=9
Step-by-step explanation:
Opposite angles in a paralellogram are equal
9x+37=11y+19, 7y-1=6x+8
Add -37 to both sides.
9x=11y−18
Divide both sides by 9
x=
11/9y−2
Substitute this into the other equation
7y−1=6x+8
7y−1=6(
11/9
y−2)+8
7y−1=
(22
/3
y−4)
Add 22/3y to both sides
-1/3y-1= -4
Solve
y=3
Substitute
x=
(11
/9
y−2
)
x=
(11
/9
(9)−2
)
x=9
The answer is B. 4s = 310
S1=-1
S2=-4
S3=-9
S4=-16
....
Sn=-n^2
...
S20=-20^2=-400
The slope of the line is 1/4.
Marc has the fastest average speed in miles per minute as he ran a mile in 6 minutes.
