A family eats at a restaurant. The bill is 42. The family leaves a tip and spends 49.77 total.

How much money does the family tip?
How much is the tip as a percentage of the bill?

Rose drew a regression line for this paired data set. her line passed through (1, 2) and (3, 5) . what is the equation of rose's regression line?

Find the equation of the line that goes through the points (4, –1) and (2, –5). use slope formula,equation,to find the slope of a line that passes through the points. m = use slope-intercept form, y = mx + b, to find the y-intercept (b) of the line. b = write the equation in slope-intercept form, y = mx + b.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?