Mathematics, 06.10.2019 08:00 bear342
Breann solved the system of equations below. what mistake did she make in her work? (5 points)
2x + y = 5
x − 2y = 10
y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10
5x = 20
x = 4
2(4) + y = 5
y = −3
she should have substituted 5 + 2x
she combined like terms incorrectly, it should have been 4x instead of 5x
she subtracted 10 from both sides instead of adding 10 to both sides
she made no mistake
Answers: 1
Mathematics, 21.06.2019 23:30
Line u passes through points (-52, -18) and (-29, 53). line v passes through points (90, 33) and (19, 56). are line u and line v parallel or perpendicular?
Answers: 1
Mathematics, 21.06.2019 23:50
Write the standard form of an equation with (see picture below)
Answers: 2
Breann solved the system of equations below. what mistake did she make in her work? (5 points)
History, 07.07.2021 18:00
Mathematics, 07.07.2021 18:00
Geography, 07.07.2021 18:00
Chemistry, 07.07.2021 18:00
Mathematics, 07.07.2021 18:00
Mathematics, 07.07.2021 18:00