Ive asked this question 4 times and nobody answers it, i guess nobody wants some points
which...
Mathematics, 28.10.2019 20:31 hilzepesqtatiana
Ive asked this question 4 times and nobody answers it, i guess nobody wants some points
which statements are true about the ordered pair (−4, 0) and the system of equations?
{2x+y=−8x−y=−4
select each correct answer.
a) the ordered pair (−4, 0) is a solution to the first equation because it makes the first equation true.
b) the ordered pair (−4, 0) is a solution to the second equation because it makes the second equation true.
c) the ordered pair (−4, 0) is not a solution to the system because it makes at least one of the equations false.
d) the ordered pair (−4, 0) is a solution to the system because it makes both equations true.
Answers: 2
Mathematics, 21.06.2019 16:00
The graph shows the distance y, in inches, a pendulum moves to the right (positive displacement) and to the left (negative displacement), for a given number of seconds x. how many seconds are required for the pendulum to move from its resting position and return? enter your answer in the box.
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Mathematics, 21.06.2019 19:40
Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.
Answers: 3
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