There are three ways to solve systems of linear equations: by elimination (sometimes called addition), by substitution, and by creating a graphical representation. in your real-world scenario, discuss advantages and disadvantages of using each of the three ways. initial posts should include two or more variables (such as the number of boys and the number of girls) and have two or more equations involving those variables (such as there are twice as many girls as boys and that there are 33 children altogether). response posts in this option should show a solution using one of the three ways.

Anull hypothesis states that the difference between 8 hours of sleep and 3 hours of sleep has no effect on the number of pictures a student will remember during a picture memory interface test (pmit). examining the mit database, an extremely small t-value of 0.1611 is found. this t-value is much smaller than the smallest t-value on the chart for p-value reference. from this information we can: select one: a. accept the null hypothesis because the p-value obtained shows that the difference between the two groups being tested is not statistically significant b. accept the null hypothesis because the p-value obtained was statistically significant c. reject the null hypothesis because of the p-value obtained d. reject the null hypothesis because the data obtained is statistically significant