Tiana has already plepared 6 kilograms of dough and will continue preparing 1 kilogram of dough every hour. How many hours did Tiana work if she prepared 15 kilograms of dough?

9 hours

Step-by-step explanation:

6 kilos done - 15 total kilos = 9 to do

1 kilo/1 hour is the rate so 9 kilos/9 hours

9 hours in total

if not this is actually a trick question because it asked how many hours which then would mean 15 hours because the rate is 1 kilo/1 hour

23

step-by-step explanation:

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is