Five years from now Dan's age will be three times the age of his son. Five years ago Dan was seven times as old as his son. What is son's present age?

Step-by-step explanation:

Lets age of father be x and age of son be y

x+5=3(y+5)

x=3y+15-5

x=3y+10

x-5=7(y-5)

3y+10-5=7(y-5)

3y+5=7y -35

35+5= 7y-3y

40=4y

y=10 years son`s age

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm