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Select the proper placement for parentheses to speed up the addition for the expression 2 + 9 + 8 + 1 A. (1 + 2) + (9 + 8) B. (8 + 9) + (2 + 1) C. (9 + 2) + (8 + 1) D. (8 + 2) + (9 + 1)
answered
Aug 15, 2018
Mathematics
high-school
3
votes
58.2k
views
Find the number of permutations of the first 8 letters of the alphabet taking four letters at a time. a.1680 b.56 c.6720 d.109
answered
Jul 6, 2018
Mathematics
high-school
4
votes
26.6k
views
True or false: It is important to write the date you visited a website when you cite it for a school report.?
answered
Jun 23, 2018
Social Studies
college
6
votes
50.0k
views
What contribution did Thomas Clarkson and William Wilburforce make to British society in the 1800s? A. They proposed laws to improve workers' lives. B. They invented machines that changed industry. C.
answered
Apr 7, 2018
History
middle-school
3
votes
176k
views
Which of the following correctly describes the relationship between speed and velocity?
answered
Mar 20, 2018
Physics
middle-school
3
votes
109k
views
Penny has been participating in a water aerobics class this year for her Physical Education elective. Her heart and lungs are in fantastic shape. What benefit is Penny realizing due to this regular participation
answered
Dec 25, 2017
Health
middle-school
1
vote
210k
views
Whatnis greatest to least? 6.54 6.098 6.908 6.9
answered
Nov 8, 2017
Mathematics
middle-school
2
votes
104k
views
There are 6 female goldfish for every 10 male goldfish in an aquarium. there are 216 female goldfish in the aquarium. how many goldfish are in the aquarium
answered
Jun 19, 2017
Mathematics
high-school
7
votes
116k
views
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