Aleast squares regression line was found. using technology, it was determined that the total sum of squares (sst) was 46.8 and the sum of squares of regression (ssr) was 14.55. use these values to calculate the percent of the variability in y that can be explained by variability in the regression model. round your answer to the nearest integer.

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

Answer this question! 30 points and brainliest! only if you know the answer.

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below.correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance.what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?