The ages of rahul and haroon are in the ratio 7: 5.four years later the sum of their ages will be 56 years. find their present ages.

Rahul is 28, and Haroon is 20. 56-8=48,

4 is the right answer

Step-by-step explanation:

let the present age be 5x and 7x

after four years rahuls age = 5x + 4

                          haroons age =7x +4

                                                =5x + 4 + 7x + 4

                                                 =56

                                                 =12x +8 =56

                                                 =12x =48

                                                   x = 4

3

step-by-step explanation:

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,