The answer is 9x+8. if you distripute the 2, you get 2x-6. if you distribute the 7, you get 7x+14. then you combine like terms ans get 9x+8
So first you sell your baseball cards for $2.50 and you need $98 THEN
The minimum cards u need to sell is
98/2.50 which is 39.2 but you can’t sell cards in fraction so the final answer is 40
1) Lines MR and LQ
2)Lines NP, ML and JK
3)Line KN
4)line JKP
Answer:
53.3324
Step-by-step explanation:
given that a thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 40° F.
By Newton law of cooling we have
T(t) = ![T+(T_0-T)e^{-kt}](https://tex.z-dn.net/?f=T%2B%28T_0-T%29e%5E%7B-kt%7D)
where T (t) is temperature at time t,T =surrounding temperature = 40, T0 =70 = initial temperature
After half minute thermometer reads 60° F. Using this we can find k
![T(0,5) = 40+(70-40)e^{-k/2} = 60\\e^{-k/2} =2/3\\-k/2 = -0.4055\\k = 0.8110](https://tex.z-dn.net/?f=T%280%2C5%29%20%3D%2040%2B%2870-40%29e%5E%7B-k%2F2%7D%20%3D%2060%5C%5Ce%5E%7B-k%2F2%7D%20%3D2%2F3%5C%5C-k%2F2%20%3D%20-0.4055%5C%5Ck%20%3D%200.8110)
So equation is
![T(t) = 40+(30)e^{-0.8110t}\\](https://tex.z-dn.net/?f=T%28t%29%20%3D%2040%2B%2830%29e%5E%7B-0.8110t%7D%5C%5C)
When t=1,
we get
![T(1) = 40+(30)e^{-0.8110}\\\\=53.3324](https://tex.z-dn.net/?f=T%281%29%20%3D%2040%2B%2830%29e%5E%7B-0.8110%7D%5C%5C%5C%5C%3D53.3324)