Refer to the Department of Energy's "Guide to Renewable Energy." Part A

What is the first thing a homeowner should do to cut costs and energy usage?

A- add native vegetation

B- invest in solar panels

C- make the home more efficient

D- put in a heat pump

Question 2

Part B

A- Which evidence from the text best supports the answer in Part A?

B- "Many homeowners can sell any excess energy their solar and wind systems produce…."

C- "Geothermal heat pumps use the ground as both a heat sources and a heat sink to D- warm and cool the home.…"

"Homeowners can save money by…installing proper insulation, air sealing, and using ENERGY STAR® qualified windows.…"

"Solar energy can generate all or some of a home’s electricity needs…."

Part A  

What is the first thing a homeowner should do to cut costs and energy usage?

C- make the home more efficient

Part B

A- Which evidence from the text best supports the answer in Part A?

"Homeowners can save money by…installing proper insulation, air sealing, and using ENERGY STAR® qualified windows.…"

Explanation:

In the guide to renewable energy, there are series of suggestion made about how to effectively manage a home and ensure that the energy consumption in such home is reduced to the barest minimum thereby saving cost.

It was widely believed that, an efficient home run appropriately helps to cut costs and energy usage. For example, using a LED bulb is more efficient than using the old incandescent bulb

answer

explanation

the given equation is

we can rewrite this as:

let

then the equation becomes:

the factors of 8 that sum up to -9 are {-1,-8}

we split the middle term with these factors to obtain,

we factor by grouping to obtain:

apply the zero product property to get:

but