Q1a.) The average age of 9 boys in a class is 15 years. If another boy of age 13 years join the class, What is the average of the 10 boys

Q1b) Find the gradient and intercept on the x and y-axis of the straight line with equation. 3y=2/3x +4.

Q1c).XYZ is a triangle with vertices x(1,-3), Y(7,5) and z(-3,5) .If o is the origin express vector XY, Vector YZ and Vector ZX as column vectors.

idk

step-by-step explanation: i just don't

$15 each

step-by-step explanation:

$45/3 children= $15 each

arc length = 6.63311 ft.

step-by-step explanation:

the formula the arc measure is:

arc length s=2πr(c)/360

where:

c   is the central angle of the arc in degrees

r   is the radius of the arc

π   is pi, approximately 3.142

using the above formula we get

s =

thus we find that arc length of an arc for a circle of radius 20 feet and central angle 19 degrees is

6.63311 feet