<span>2x+y=8
2x+x-7=8
3x=15
x=5
y=5-7
y=-2</span>
I would say B. The mean is a good measure of central tendency.
I hope this helps!
Answer:
320
Step-by-step explanation:
320 words per minute 40x8=320
X*y=72
x = 5y-2
x=72/y
72/y=5y-2
72=5y^2-2y
5y^2 -2y - 72 = 0
(5y+18)(y-4)=0
y = -18/5 discard
or y = 4
4x=72
x=18
(18,4)
6 is a quarter of her walk ... there are 4 quarters in a whole (6x4) = 24
