Mathematics, 03.03.2020 03:42 SavgeKid7578
Identify a possible first step using the elimination method to solve the system and then find the solution to the system.
2x - 5y = 11
3x + 2y = 7
Multiply first equation by 3 and second equation by 2. solution (5, 1)
Multiply first equation by 2 and second equation by - 3 solution (3-1)
Multiply first equation by -3 and second equation by-2. solution (3.1).
Multiply first equation by -3 and second equation by 2. solution (3,-1) |
Answers: 2
![\bf \begin{array}{lcrrrrr} 2x-5y=11&\stackrel{\stackrel{\textit{\large first step}}{\downarrow }}{\times -3}\implies &-6x&+&15y&=&-33\\ 3x+2y=7&\times 2\implies &6x&+&4y&=&14\\\cline{3-7} &&0&+&19y&=&-19 \end{array} \\\\\\ y = \cfrac{-19}{19}\implies \boxed{y=-1} \\\\\\ \stackrel{\textit{substituting on the 1st equation}}{2x-5(-1)=11\implies 2x+5=11}\implies 2x=6\implies x = \cfrac{6}{2}\implies \boxed{x = 3} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill (3~~,~~-1)~\hfill](/tpl/images/0531/6949/aa977.png)
Another question on Mathematics
Mathematics, 21.06.2019 19:50
How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?
Answers: 3
Mathematics, 21.06.2019 22:00
The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample
Answers: 1
Mathematics, 21.06.2019 23:30
Maddie's rectangular kitchen has an area of 10 square yards and a length of 3 3/4 yards.how many yards wide is maddie's kitchen?
Answers: 1
You know the right answer?
Identify a possible first step using the elimination method to solve the system and then find the so...
Questions
Mathematics, 09.09.2020 22:01
Mathematics, 09.09.2020 22:01
Biology, 09.09.2020 22:01
Mathematics, 09.09.2020 22:01
Mathematics, 09.09.2020 22:01
