Mathematics, 04.02.2021 04:40 Tuffers
Let (R,+,·) be a ring and e, f ∈ R two idempotent elements such that e f = f e = 0. Show that the elements 1-e, 1-f and e+f are also idempotent. Determine the idempotent elements of the ring Z20
Answers: 3
Mathematics, 21.06.2019 18:30
At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.
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Mathematics, 21.06.2019 18:50
In which form is the following function written? y = - 2(x – 3)(x + 5)
Answers: 1
Mathematics, 22.06.2019 01:30
The box plots show the distributions of the numbers of words per line in an essay printed in two different fonts.which measure of center would be best to compare the data sets? the median is the best measure because both distributions are left-skewed.the mean is the best measure because both distributions are left-skewed.the median is the best measure because both distributions are symmetric.the mean is the best measure because both distributions are symmetric
Answers: 1
Mathematics, 22.06.2019 02:30
In terms of x, find an expression that represents the area of the shaded region. the outer square has side lengths of (x+5) and the inner square has side lengths of (x-2), as shown. area: a1 x + a2 square units submit
Answers: 3
Let (R,+,·) be a ring and e, f ∈ R two idempotent elements such that e f = f e = 0. Show that the el...
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