posted by Elllie on .
Please check answer and help with one of them:
1. check please
car in an accident speed of car is the s, d is length of skid=30 feet
f is coefficient=0.5
use formula to find
s=sqaure root of 30*f*d
My answer is 21.21 because I took square root of 30(0.5)(30)
2. this one is baffling to me-how do I do this one-3 times square root of (x+1) is less than or equal to 7 Please help-Thank you
I posted earlier but no one answered so I was hoping if I reposted someone could help
3√(x+1) ≤ 7
9(x+1) ≤ 49
9x ≤ 40
x ≤ 40/9
of course in √(x+1) , x >-1 or else the √ is undefined.
so -1 ≤ x ≤ 40/9
Thank you for showing me the second one-just one question-is #1 correct the way I did it?
correct if you formula was
s = √(30fd)
The 30fd was under the square root sign-thank you