Mathematics, 25.06.2019 19:30 gabrielaperezcz
Darlene wrote this proof of the identity (x + y)2 - (x - y)2 = 4xy. which of the following is a justification for step 4 of her proof? step 1: (x + y)2 - (x - y)2 = (x + y)(x + y) - (x - y)(x - y) step 2: (x + y)(x + y) - (x - y)(x - y) = (x2 + xy + xy + y2) - (x2 - xy - xy + y2) step 3: (x2 + xy + xy + y2) - (x2 - xy - xy + y2) = (x2 + 2xy + y2) - (x2 - 2xy + y2) step 4: (x2 + 2xy + y2) - (x2 - 2xy + y2) = x2 + 2xy + y2 - x2 + 2xy - y2 step 5: x2 + 2xy + y2 - x2 + 2xy - y2 = 4xy a. reflexive property b. definition of squaring a binomial c. combining like terms d. distributive property
Answers: 1
Mathematics, 21.06.2019 16:30
Marco is studying a type of mold that grows at a fast rate. he created the function f(x) = 345(1.30)x to model the number of mold spores per week. what does the 1.30 represent? how many mold spores are there after 4 weeks? round your answer to the nearest whole number. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores
Answers: 1
Mathematics, 21.06.2019 19:00
15 points! write the slope-intercept form of the equation of the line through the given point with the given slope. use y-y = m(x-x) to solve. through (2,5) slope= undefined
Answers: 2
Darlene wrote this proof of the identity (x + y)2 - (x - y)2 = 4xy. which of the following is a just...
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