Keri and his friends are on their way to visit some family friends who lives 1050 miles away from them. based on the route they shoes they expect to complete their trip in three days. the distance and average speeds for the first two days driven are shown below:
first day : 5 hours at an average speed of 70 miles per hour
second day: 7 hours at an average an average speed of 65 miles per hour
if the average speed on the third day is 70 miles per hour how many more hours will it take for them to reach their friends home

3.5 hours

Step-by-step explanation:

5 x 70 = 350

7 x 65 = 455

350 + 455 = 805

1050 - 805 = 245

245/ 70 = 3.5

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0