Simplify 10 – 3x – 13 + 5x A. 2x – 3 B. 1 C. 3 – 3x D. 3 – 2x

Mathematics

2 answers:

sukhopar [10]3 years ago

7 0

D ..................................................................................................................

Mama L [17]3 years ago

7 0

The answer would be A. After being simplified, 10-13=-3 and -3x+5x equals 2x, if you just switch them around you get 2x-3 as your simplified answer.

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A. Use substitution and show work

Alja [10]

A) 2x -3(3x -7) = 7 . . . . substitute for y
.. -7x = -14 . . . . . . . . . . . subtract 21
.. x = 2 . . . . . . . . . . . . . divide by -7
.. y = 3*2 -7 = -1 . . . . . . substitute for x
(x, y) = (2, -1)

B) 5(5x -2y) -2(3x -5y) = 5(8) -2(1) . . . . subtract 2 times 2nd equation from 5 times 1st
.. 19x = 38 . . . . simplify
.. x = 2 . . . . . . . divide by 19
.. y = (5x -8)/2 = 1 . . . . solve 1st equation for y, substitute x
(x, y) = (2, 1)

C) See the first graph.
(x, y) = (-4, 1)

D) See the second graph.
(x, y) = (3, 2)