![\bf Px+35=-6x+Q\implies \stackrel{P}{~~\begin{matrix} -6 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}}x+35=~~\begin{matrix} -6x \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~+\stackrel{Q}{35}\implies 35=35](https://tex.z-dn.net/?f=%5Cbf%20Px%2B35%3D-6x%2BQ%5Cimplies%20%5Cstackrel%7BP%7D%7B~~%5Cbegin%7Bmatrix%7D%20-6%20%5C%5C%5B-0.7em%5D%5Ccline%7B1-1%7D%5C%5C%5B-5pt%5D%5Cend%7Bmatrix%7D%7Dx%2B35%3D~~%5Cbegin%7Bmatrix%7D%20-6x%20%5C%5C%5B-0.7em%5D%5Ccline%7B1-1%7D%5C%5C%5B-5pt%5D%5Cend%7Bmatrix%7D~~%2B%5Cstackrel%7BQ%7D%7B35%7D%5Cimplies%2035%3D35)
whenever you get an equality like so, that's a flat that both equations are exactly one and the same and thus the system has "infinitely many solutions".
5. the answer is (x,y) = (-1,5)
6. the answer is (x,y) = (0,2)
7. the answer is (x,y) = (-2,1)
8. the answer is (x,y)= (5,0)
Answer is 24, the hypotenuse is twice the size of the shortest leg
Total number of hours=18 hrs
Number of engineers=3
So divide number of hours by number of engineers.
18/3=6 hours
Answer: Option A 6
the answer is A ,when x=0,g(x)is-1,so when u add x into the g(x),which is given below,u can find C,D,E,g(x) is no equal to -1,when you add x=1 into g(x)(A,B),you can find g(x) of B is 0,which is no equal the answer giving above(g(x)=2),but A is all right.
