Mathematics, 23.11.2019 07:31 Weaj01
1. lisa is working with the system of equations x + 2y = 7 and 2x ‒ 5y = 5. she multiplies the first equation by 2 and then subtracts the second equation to find 9y = 9, telling her that y = 1. lisa then finds that x = 5. thinking about this procedure, lisa wonders:
there are lots of ways i could go about solving this problem. i could add 5 times the first equation and twice the second or i could multiply the first equation by ‒2 and add the second. i seem to find that there is only one solution to the two equations but i wonder if i will get the same solution if i use a different method?
what is the answer to lisa’s question? explain.
2. does the answer to the first question change if we have a system of two equations in two unknowns with no solutions? what if there are infinitely many solutions?
Answers: 1
Mathematics, 21.06.2019 17:30
Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?
Answers: 1
Mathematics, 21.06.2019 21:30
Zack notices that segment nm and segment pq are congruent in the image below: which step could him determine if δnmo ≅δpqr by sas? (5 points) segment mo ≅ segment qr segment on ≅ segment qp ∠ n ≅ ∠ r ∠ o ≅ ∠ q
Answers: 3
Mathematics, 21.06.2019 23:00
Using only odd number for numerators write two different subtraction problems that have a difference of 3/4
Answers: 1
Mathematics, 21.06.2019 23:00
Shared decision making is always a positive strategy to take
Answers: 1
1. lisa is working with the system of equations x + 2y = 7 and 2x ‒ 5y = 5. she multiplies the first...
Chemistry, 08.08.2019 02:10
Mathematics, 08.08.2019 02:10
Mathematics, 08.08.2019 02:10
Mathematics, 08.08.2019 02:10
English, 08.08.2019 02:10
Mathematics, 08.08.2019 02:10