kaloyanvelikov8 kaloyanvelikov8
  • 23-01-2021
  • Mathematics
contestada

A right-angled triangle has sides of lengths (x+5)cm, (x-3)cm and 9cm. Calculate the value of x. Give your answer to 3 significant figures. (Quadratic Formula)

A rightangled triangle has sides of lengths x5cm x3cm and 9cm Calculate the value of x Give your answer to 3 significant figures Quadratic Formula class=

Respuesta :

PiaDeveau PiaDeveau
  • 28-01-2021

Answer:

x = (3.95 and -5.95)

Step-by-step explanation:

Given:

Hypotenuse = 9 cm

Perpendicular = (x+5) cm

Base = (x-3) cm

Find:

Value of x

Computation:

Using Pythagoras theorem

Hypotenuse² = Perpendicular² + Base²

9² = (x+5)² + (x-3)²

81 = x² + 25 + 10x + x² + 9 - 6x

2x² + 4x - 47 = 0

Quadratic Formula

x = [-b±√b²-4ac] / 2a

x = [-4±√16+376] / 2(2)

x = (3.95 and -5.95)

Answer Link

Otras preguntas

Maps are examples of ____ models that people might use everyday.
What was the Khmer Rouge’s plan for Cambodia?
What is the simplest form of 96/64
In Candomblé, orixás are __________.
Which of the following allows you to view and access important information about your document all in one location?
If two animals belong to the same order, are they more or less closely related than two animals who belong to the same family? More Less Equally Not enough info
How did Vietnam become divided?
The basic economic questions that any provider of goods must ask are: What will be produced? Who will produce it? For whom will it be produced? In which type of
Organisms,such as hawks and leopards, that obtain their energy from foods they consume are called Choose one answer. a. autotrophs b. heterotrophs c. produ
The Spanish-American War helped the United States