Krista needs her kitchen sink repaired. she pays a plumber a flat fee for an initial consultation, and then she pays him an hourly rate for the time he works on the repair. the equation y = 25x + 40 represents this situation, where x is the number of hours and y is the total cost. what does the number 40 in the equation represent?

The "40" represents the flat fee (for an initial consultation).

Step-by-step explanation:

The equation is in slope-intercept form, , where the mx is the rate of change and the b is like the flat fee, or the base amount.

I hope that helps! :)

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b