Em uma estação elevatória de água tratada eleva 144 m³/h de água para um reservatório o através de uma tubulação de Ferro Fundido (C = 130) com 2000 m de comprimento e 200 mm de diâmetro. Determine a perda de carga total (Contínua + localizada). Utilize ambos os 2 métodos de determinação da perda de carga localizada ( Método de Borda e o Método do Comprimento Equivalente ). Peças especiais no recalque Registro de gaveta 1 unidade Válvula de retenção 1 unidade Curva de 90º 2 unidades Curva de 45º 3 unidades​

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94