Heather has $45.71 in her savings account. She bought six packs of markers to donate to her school. If each pack of markers cost
2 answers:
Answer: The correct option is (D) $21.77.
Step-by-step explanation: Given that Heather has $45.71 in her savings account and she bought six packs of markers to donate to her school. Each pack of markers cost $3.99.
We are to find the amount of money that she has in her bank account after the donation.
Cost of 1 pack of marker = $3.99.
So, the cost of six packs of marker = $(3.99 × 6) = $23.94.
Since there was $45.71 in her savings account before the donation, so the amount of amount of left after the donation is given by
Thus, the required amount of money left in her saving's account after the donation is $21.77.
Option (D) is CORRECT.
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.. -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)
.. -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)