For the following system, if you isolated x in the first equation to use the substitution method, what expression would you substitute into the second equation? −x − 2y = −4 and 3x + y = 12 a.) −2y − 4 b.) 2y − 4 c.) 2y + 4 d.) -2y + 4

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Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21