Acleaning company uses 10 lbs each of chemicals a, b and c for each house it cleans. after some quality complaints, the company has decided to increase its use of chemical a by an additional 10 lbs for each house. by what % has productivity (houses per pound of chemical) fallen?

25%

Step-by-step explanation:

Let us first derive an equation for the productivity.

Given

No. of houses = 1 (Assumption)

Amount of Chemicals = 30 (10 x A, B, C)

Now the formula for productivity is as follow

Productivity % (P) = (Output/Input) * 100

Assuming the current productivity is 100%. We get the value for required output but using the value of 30 (Amount of Chemicals) as Input

Since we now know the value for desired output. We replace the value of input by 40, since 10 lbs of Chemicals have been increased per house.

The new Productivity is 75%

There is a reduction of 25% in productivity

i think 1: 2

step-by-step explanation:

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.