B) The cost (x) for hiring and artist for a stage show for (y) hours is represente as 2y + x = 20.
Draw the graph 2y + x = 20 on the grid below.
[4]​

The easiest way is to transform this equation to intercept form of straight line.

Intercept form of straight line:

where is the x intercept - where the graph intersects the x axis, and is the y intercept - where the graph intersects the y axis.

Given that,

On comparing with we get,

Hence, the graph shall cut the x axis and y axis at 20 and 10 respectively. This information is enough to plot the graph.

Graph: Refer to the attachment.

answer: -1

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.