Mathematics, 30.01.2020 00:01 kat1191
Ernesto tried to determine the solution for the system of equations using substitution. his work is shown below.
x – y = 7
3x – 2y = 8
step 1: x = y + 7
step 2: 3(y + 7) – 2y = 8
step 3: 3y + 7 – 2y = 8
step 4: y + 7 = 8
step 5: y = 1
in which step did ernesto make the first error?
step 1
step 2
step 3
step 4
Answers: 2
Mathematics, 21.06.2019 14:30
The la dodgers hit the most homeruns in 2014. the number of homeruns accounted for 6% of the entire major leauge baseball homerun count. if 583 total homeruns were hit, approximately how many did the la dodgers hit
Answers: 1
Mathematics, 21.06.2019 23:30
Which statements are true about box plots? check all that apply. they describe sets of data. they include the mean. they show the data split into four parts. they show outliers through really short “whiskers.” each section of a box plot represents 25% of the data.
Answers: 3
Mathematics, 22.06.2019 02:00
Atriangle has vertices of (0,3.5), (3,1.5), (0, -1.5). if it is dilated with center at the origin, and a scale factor of 2, what will be the coordinates of the image?
Answers: 3
Mathematics, 22.06.2019 02:30
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
Ernesto tried to determine the solution for the system of equations using substitution. his work is...
Mathematics, 26.10.2020 06:30
Mathematics, 26.10.2020 06:30
Mathematics, 26.10.2020 06:30
Mathematics, 26.10.2020 06:30
Mathematics, 26.10.2020 06:30
Mathematics, 26.10.2020 06:30
Chemistry, 26.10.2020 06:30
Mathematics, 26.10.2020 06:30
Arts, 26.10.2020 06:30
Mathematics, 26.10.2020 06:30