Joe borrowed $6,000 from the bank at a rate of 7% simple interest in per year. how much interest did he pay in 9 years?
1 answer:
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A suitable calculator can row-reduce the augmented matrix.
first number: 3
second number: 1
third number: 8
first number: 3
second number: 1
third number: 8
Answer:
parallel:
perpendicular:
Step-by-step explanation:
original line:
-7x + 8y = 4
m = 7/8
parallel:
m = 7/8
L: 7x - 8y = k
(4, -4) -> L
28 + 32 = 60 = k
L: 7x - 8y = 60
perpendicular:
m = -8/7
L: -8x + 7y = k
(4, -4) -> L
-32 + 28 = -4 = k
L: -8x -7y = -4
=> 8x + 7y = 4