Catalina paints with watercolors on a sheet of paper a = 22 inches wide by b = 17 inches high. She then places this sheet on a mat so that a uniformly wide strip of the mat shows all around the picture. The perimeter of the mat is 102 inches. How wide is the strip of the mat showing around the picture?
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Answer: 3
Mathematics
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Evaluate the expression.
A. 6 B. 1 C. 15 D. 0!
Mathematics
If possible, simplify the expression. If any variables exist, assume that they are positive.
- 
+ 
A. 
B. 
C. - 
D. 
Mathematics
Evaluate the expression x + y for the given values of the variables.x = 6, y = -7
A. 1 B. -1 C. -13 D. 13
Mathematics
Suppose the number of endangered species y can be approximated by the formula 
where t is the number of years past 1980. How many species does the formula estimate will be added to the endangered species list between 2007 and 2020? Round your answer to the nearest whole number.
?
?
A. 448 species. B. 443 species. C. 474 species. D. 469 species. E. 420 species.
Mathematics