Mathematics, 20.09.2019 20:00 nell44
Answer the following true or false. justify your answer.
(a) if a is a subset of b, and x∈b, then x∈a.
(b) the set {(x, y) ∈ r2 | x > 0 and x < 0} is empty.
(c) if a and b are square matrices, then ab is also square.
(d) a and b are subsets of a set s, then a∩b and a∪b are also subsets of s.
(e) for a matrix a, we define a^2 = aa.
Answers: 2
Mathematics, 21.06.2019 18:10
The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%
Answers: 2
Mathematics, 21.06.2019 20:30
Given: klmn is a parallelogram m? n=3m? k, lf ? kn , ld ? nm kf=2 cm, fn=4 cm find: lf, ld
Answers: 1
Mathematics, 21.06.2019 23:00
40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows.statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.
Answers: 2
Answer the following true or false. justify your answer.
(a) if a is a subset of b, and x∈b, t...
(a) if a is a subset of b, and x∈b, t...
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