bree249

06.04.2020 • 

Mathematics

7. A contractor that builds houses uses the following expression to estimate bids for his customers, based on
the square footage of the house. For roofing materials he estimates 98x + 1000. For concrete and dirt
work he estimates 350x + 3000. For flooring materials he estimates 300x + 1200. For walls, insulation, and
windows he estimates 900x + 1500. For electrical, plumbing, and HVAC work he estimates 120x + 6500. If
a customer chose to have the contractor provide all of these, write a polynomial that he could use to give
his customers an estimate.

Ответ:

umarhaley

10.09.2021

Mathematics

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Part A: Triangle ABD is similar to Triangle ACD

Part B: Using HL Theorem, we can determine these 2 right triangles to be similar

Part C: DA = 3

Step-by-step explanation:

We can use HL (Hypotenuse-Leg) Theorem to help determine similarity. Since DA perpendicular bisects BC, we know that it forms the altitude and forms right triangles, which gives us legs and a hypotenuse,

To find DA, we are given right triangle ACD. We know that one leg, CD, is equal to 4. We also know that 3-4-5 is a Pythagorean Triple, so DA would be 3 and AC would be 5.

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