dallaskmeasles dallaskmeasles
  • 26-05-2021
  • Mathematics
contestada

Find X.
Round to the nearest tenth.
Z
20 ft
22ft
X
18 ft
Y
X= [?]°

Find X Round to the nearest tenth Z 20 ft 22ft X 18 ft Y X class=

Respuesta :

jimrgrant1 jimrgrant1
  • 26-05-2021

Answer:

X≈ 70.5°

Step-by-step explanation:

Using the cosine rule in Δ XYZ

cos X = [tex]\frac{y^2+z^2-x^2}{2yz}[/tex]

with x = 22, y = 20, z = 18 , then

cos X = [tex]\frac{202+18^2-22^2}{2(20)(18)}[/tex]

          = [tex]\frac{400+324-484}{720}[/tex]

          = [tex]\frac{240}{720}[/tex] , then

∠ X = [tex]cos^{-1}[/tex] ([tex]\frac{240}{720}[/tex] ) ≈ 70.5° ( to the nearest tenth )

Answer Link

Otras preguntas

write all of the numbers that round to 50
in the field of history, a statement that must be proven with evidence throughout an essay, or book must be known as: A) Thesis B) Thesaurus C) Mantra D) Declar
What kinds of scientific investigations involve making observations?
Thomas is a racquetball player who increased his ability to move quickly up and down the court. Which component has he probably added to his training regimen?
X squared minus 25 equals 0
A jet travels 1464 mi against the wind in 2 hours and 1704 mi with the wind in the same amount of time. What is the rate of the jet in still air and what is the
If you round 552,945 what would be the anwering
what's the first step of the scientific method
According to Charles Darwin, what was the result of natural selection? a. Over time, animals lost specialization. b. Over time, species became better adapted
Solve 9x-7y=-7 i don't know how to do it so could you show me step by step please