Mathematicians use "..." to mean that a pattern continues: it means to fill in everything in-between.
Let A represent 1+3+5+ ... + 99, the sum of all the odd
numbers less than 100.
Let B represent 2+4+6... + 98, the sum of all the even
numbers less than 100.
Which is bigger, A or B, and by how much? Do this without adding
them up the long way. A full solution to this challenge problem
means that you must explain why your answer is correct - you
can't just give a number, you have to prove it!

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

Drag the tiles to the boxes to form correct pairs. not all tiles will be used. match each set of vertices with the type of quadrilateral they form

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?