56.7 should be the right answer
X + (4x+15) = 180
5x+15=180
5x=165
x=33
4(33)+15=147. (Or you could subtract 33 from 180)
Check answer: 33+147=180 yes
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:
the unit rate of 1/7 is itself (1/7), and for 1/21 is 1/21.
Step-by-step explanation:
this is because these rates/ratios are unit fractions. so if the numerater is 1, theres nothing you can do to simplify it.
you can check with the ceaser method as well, but you're still going to find the same solution.
plus, for example, if it takes 7 grams of sugar to make 1 cake, it wouldnt make sense for 1 gram of sugar to make 7 cakes.
hope this helped clear up your confusion <3
So Kalinda starts with $25. Then she spends $14.28. This means you subtract since she spends it. Next, she shares $2.65. Again, use subtraction. The remainder is your answer. Or you can add 14.28 to 2.65 and then subtract that from 25.