The z-score of 30,000 is -2. Reference to a normal standard distribution table shows that 97.72% of tires will have a life of at least 30,000 miles.
Answer:
y = - c/B + Ax/B
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
Answer:
C
Step-by-step explanation:
If the parabola opens upward, it has a minimum.
If it opens downwards, it has a maximum.
Let
be the number of days spent at Tahoe and San Francisco, respectively.
We don't know the values of
and
yet, but we know that the holiday lasted 9 days:
![T+S=9](https://tex.z-dn.net/?f=T%2BS%3D9)
We also know that each day spent in Tahoe costed 350 and each day spent in San Francisco costed 475. So, the total cost of the holiday is the sum of the number of days muliplied by their cost:
![350T+475S=3650](https://tex.z-dn.net/?f=350T%2B475S%3D3650)
If we put the two equations together, we have the system
![\begin{cases}T+S=9\\350T+475S=3650\end{cases}](https://tex.z-dn.net/?f=%5Cbegin%7Bcases%7DT%2BS%3D9%5C%5C350T%2B475S%3D3650%5Cend%7Bcases%7D)
Which yields
![S=4,\quad T=5](https://tex.z-dn.net/?f=S%3D4%2C%5Cquad%20T%3D5)
Answer:
90 cm
Step-by-step explanation:
The top and the bottom are the same length, 45 cm
The horizontal piece at the bottom is 45-25 = 20 cm
The left and the right are the same length 30cm
The vertical piece at the bottom is 30 -22 =8 cm
Starting at the bottom left corner and going clockwise, we add up all the sides to find the perimeter
22 +45+30+20+8+25
150
The perimeter is 150 cm