ANSWER:
(-7)^2-4*(-7)
=49+28
=77
Hope it helps u! :)
In a normal distribution, the median (I think you meant to say) is equal to the mean and mode.
Answer: root of 18
9+9=x^2
18=x^2
x = 3 root of 2 or root of 18
Answer:
Jada walked 
Elena walked 
Lin walked 
Step-by-step explanation:
Let
x----> total miles walked by Jada
y----> total miles walked by Elena
z----> total miles walked by Lin
we know that
-----> equation A
----->
------> equation B
------> equation C
Substitute equation C and equation B in equation A and solve for x




Find the value of y

Find the value of z

therefore
Jada walked 
Elena walked 
Lin walked 
6/10, 9/15,12/20,15/25
Those are all equal to 3/5.
Hope this helps and hope you have a great day