John and Elijah are both driving from New York City to Richmond. John leaves at 7:20 and averages 60 mph (miles per hour) on the way. Elijah leaves
at 7:30 and averages 62 mph on the way. The situation is modeled by this
system, where x is the number of hours after Elijah leaves and y is the
distance each will travel.
y= 60x + 10
y = 62x
How long after Elijah leaves will he pass John, and how far will they each
have traveled?
A. Elijah will not pass John, because he will never catch up with him.
B. Elijah will pass John after 2 hours, and they each will have traveled
128 miles.
C. Elijah will pass John after 5 hours, and they each will have traveled
310 miles.
D. Elijah will pass John after 4 hours, and they each will have traveled
248 miles.

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?

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction

Each of the following data sets has a mean of x = 10. (i) 8 9 10 11 12 (ii) 7 9 10 11 13 (iii) 7 8 10 12 13 (a) without doing any computations, order the data sets according to increasing value of standard deviations. (i), (iii), (ii) (ii), (i), (iii) (iii), (i), (ii) (iii), (ii), (i) (i), (ii), (iii) (ii), (iii), (i) (b) why do you expect the difference in standard deviations between data sets (i) and (ii) to be greater than the difference in standard deviations between data sets (ii) and (iii)? hint: consider how much the data in the respective sets differ from the mean. the data change between data sets (i) and (ii) increased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). the data change between data sets (ii) and (iii) increased the squared difference îł(x - x)2 by more than data sets (i) and (ii). the data change between data sets (i) and (ii) decreased the squared difference îł(x - x)2 by more than data sets (ii) and (iii). none of the above