Answer:
No
Step-by-step explanation:
Step 1: Write equation
8u - 1 = 6u
Step 2: Solve for <em>u</em>
- Subtract 6u on both sides: 2u - 1 = 0
- Add 1 to both sides: 2u = 1
- Divide both sides by 2: u = 1/2
∴ u = -1/2 is NOT a solution.
Answer:
I think its 7 - C
Step-by-step explanation:
Because "difference" means subtraction
Answer:
b. Kathy
Step-by-step explanation:
We compare each of their score by how far away from the mean when in term of the standard deviation. Using the following formula
![\frac{x - \mu}{\sigma}](https://tex.z-dn.net/?f=%5Cfrac%7Bx%20-%20%5Cmu%7D%7B%5Csigma%7D)
For John he is (85 - 75)/5 = 2.
For Kathy she is (80 - 50)/10 = 3.
Since Kathy is 3 standard deviation better than her class' average, while John is only 2's. We conclude that Kathy did better.
The car rental is 38.15 + 12 1/2 per mile or
![\bf \textit{rental function R(x) then is } \\\\ R(m)=38.15+12\frac{1}{2}m\implies R(m)=38.15+\cfrac{25}{2}m \\\\ -----------------------------\\\\ \textit{she drove 380.5 miles}\implies m=380.5\\\\ -----------------------------\\\\ R(380.5)=38.15+\cfrac{25}{2}(380.5)\impliedby \textit{she owes that much}](https://tex.z-dn.net/?f=%5Cbf%20%5Ctextit%7Brental%20function%20R%28x%29%20then%20is%20%7D%0A%5C%5C%5C%5C%0AR%28m%29%3D38.15%2B12%5Cfrac%7B1%7D%7B2%7Dm%5Cimplies%20R%28m%29%3D38.15%2B%5Ccfrac%7B25%7D%7B2%7Dm%0A%5C%5C%5C%5C%0A-----------------------------%5C%5C%5C%5C%0A%0A%5Ctextit%7Bshe%20drove%20380.5%20miles%7D%5Cimplies%20m%3D380.5%5C%5C%5C%5C%0A-----------------------------%5C%5C%5C%5C%0AR%28380.5%29%3D38.15%2B%5Ccfrac%7B25%7D%7B2%7D%28380.5%29%5Cimpliedby%20%5Ctextit%7Bshe%20owes%20that%20much%7D)
now, we're assuming she drove that in 1day, thus she's only getting charged 38.15, for 1 day :)