You should insert a picture or something so i could help
Answer:
![-45y + 70](https://tex.z-dn.net/?f=-45y%20%2B%2070)
Step-by-step explanation:
<u>Step 1: Combine like terms</u>
![-30y + (-15y) + 70](https://tex.z-dn.net/?f=-30y%20%2B%20%28-15y%29%20%2B%2070)
![-30y - 15y + 70](https://tex.z-dn.net/?f=-30y%20-%2015y%20%2B%2070)
![-45y + 70](https://tex.z-dn.net/?f=-45y%20%2B%2070)
Answer: ![-45y + 70](https://tex.z-dn.net/?f=-45y%20%2B%2070)
Answer:
Number of Trucks = 17
Step-by-step explanation:
Given:
Total number of cars and truck = 43
Find:
Number of Trucks
Computation:
Assume
Number of Trucks = x
Number of Cars = 2x - 8
Total number of cars and truck = Number of Trucks + Number of Cars
43 = x + 2x - 8
51 = 3x
x = 17
Number of Trucks = 17
10, 14, 18 ....
notice, we get the next term by simply adding 4 to the current term, thus "4" is the "common difference, and we know that 10 is the first term.
![\bf n^{th}\textit{ term of an arithmetic sequence} \\\\ a_n=a_1+(n-1)d\qquad \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ d=\textit{common difference}\\ ----------\\ a_1=10\\ d=4\\ n=17 \end{cases} \\\\\\ a_{17}=10+(17-1)(4)\implies a_{17}=10+(16)(4) \\\\\\ a_{17}=10+64\implies a_{17}=74\\\\ -------------------------------](https://tex.z-dn.net/?f=%5Cbf%20n%5E%7Bth%7D%5Ctextit%7B%20term%20of%20an%20arithmetic%20sequence%7D%0A%5C%5C%5C%5C%0Aa_n%3Da_1%2B%28n-1%29d%5Cqquad%20%0A%5Cbegin%7Bcases%7D%0An%3Dn%5E%7Bth%7D%5C%20term%5C%5C%0Aa_1%3D%5Ctextit%7Bfirst%20term%27s%20value%7D%5C%5C%0Ad%3D%5Ctextit%7Bcommon%20difference%7D%5C%5C%0A----------%5C%5C%0Aa_1%3D10%5C%5C%0Ad%3D4%5C%5C%0An%3D17%0A%5Cend%7Bcases%7D%0A%5C%5C%5C%5C%5C%5C%0Aa_%7B17%7D%3D10%2B%2817-1%29%284%29%5Cimplies%20a_%7B17%7D%3D10%2B%2816%29%284%29%0A%5C%5C%5C%5C%5C%5C%0Aa_%7B17%7D%3D10%2B64%5Cimplies%20a_%7B17%7D%3D74%5C%5C%5C%5C%0A-------------------------------)
Answer:
2.64
Step-by-step explanation:
x² + 6= 13
x² = 13-6
x²= 7
x = square root of 7
x = 2.64