When finding the sum of 512 and –614, josh used a left-to-right algorithm to compute the answer. he first added the hundred’s digits 500 + (–600) = –100 he then added the ten’s digits 10 + (–10) = 0 lastly, he added the one’s digits 2 + (–4) = –2 his result was –100 + 0 + (–2) = –102 is josh’s answer correct? how else could josh have computed the sum?

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.