How I got the answer for math questions

Sherrys family is going to a beach resort. Sherry bought 7 beach towels that cost $13 each to take to the resort. To find the total cost, she added products of 7x10 and 7x3, for a total of $91. What property did Sherry use?

F (x) = 3x + 8; g (x) = 5x - 9 (a) Find (f + g) (x).

9. Based on the patterns observed in Exercises 5-8, describe a general formula that can be used to find the number of permutations of n things taken? at a time, or nPr

What are the mean median mode and range of the data set given the altitude of lakes feet - 11 - 28 - 17 - 25 - 28 - 39 - 6 and - 46

Write the decimal in fractional notation: 0.097 A 97/1000 B 97/10,000 C 970 / 1000 D 97/10

What's the relationship between ratios, rates, and proportions?

8625 arrests, 2678 robberies, 865 assaults and 20 murders what is the ratio for assaults to robberies for 258,959 in the simplest form

A total of 544 tickets were sold for the school play. They were either adult tickets or student tickets. The number of student tickets sold was three times the number of adult tickets sold. How many adult tickets were sold?

Jonathan and Byron both have comic book collection the number of books in the collection form a ratio 4:9 of Jonathan's to Byrons if Byron has 20 more books than Jonathan how many books does Jonathan have

four fifts times what equals two thirds