Select all expressions that are perfect squares.
2x2 + 20x + 100
9x2 + 24x + 16
(7 – 3x...
Mathematics, 18.03.2021 19:50 actived
Select all expressions that are perfect squares.
2x2 + 20x + 100
9x2 + 24x + 16
(7 – 3x)2
(5x + 4) (5x – 4)
(1 – 2x) (-2x + 1)
4x2 +6x +
9
Answers: 1
Mathematics, 21.06.2019 16:30, cxttiemsp021
Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?
Answers: 1
Mathematics, 22.06.2019 01:10, aidanfbussiness
I'm marking the brainliest and it's 15 points
Answers: 1
Mathematics, 22.06.2019 02:30, Leii691
According to a research study, parents with young children slept 6.4 hours each night last year, on average. a random sample of 18 parents with young children was surveyed and the mean amount of time per night each parent slept was 6.8. this data has a sample standard deviation of 0.9. (assume that the scores are normally distributed.) researchers conduct a one-mean hypothesis at the 5% significance level, to test if the mean amount of time parents with young children sleep per night is greater than the mean amount of time last year. the null and alternative hypotheses are h0: μ=6.4 and ha: μ> 6.4, which is a right-tailed test. the test statistic is determined to be t0=1.89 using the partial t-table below, determine the critical value(s). if there is only one critical value, leave the second answer box blank.
Answers: 3
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