Sally is comparing the prices of two window cleaning companies. company a charges $7 per window and ajbadditional $12 as service charges. company b charges $5 per window and an additional $15 as service charges. part a: write an equation to represent each company’s total charges for cleaning a certain number of windows, for both equations (one for company a and one for company b), define the variable used . part b: how much would company a and company b each charge for cleaning 8 windows ? very quick

Use this data in the problem below. follow the steps carefully. round to the nearest tenth. lot 3: week 1: 345 week 2: 340 week 3: 400 week 4: 325 step 1. jim enters the data and calculates the average or mean. step 2. jim calculates the deviation from the mean by subtracting the mean from each value. step 3. jim squares each deviation to remove negative signs. step 4. jim sums the squares of each deviation and divides by the count for the variance. step 5. jim takes the square root of the variance to find the standard deviation.

What are the relative frequencies, to the nearest hundredth, of the rows of the two-way table? group 1: a 15 b 45 group 2: a 20 b 25

Enter the missing numbers in the boxes to complete the table of equivalent ratios of lengths to widths. ? 18 8 ? 10 30 12 ?