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riadik2000 [5.3K]
3 years ago
11

In what order were the following energy sources discovered by humans ?

Mathematics
2 answers:
poizon [28]3 years ago
7 0

Answer:

i think it is c

Step-by-step explanation:

yea i think it is c though

Gwar [14]3 years ago
5 0

Answer: It’s A

Step-by-step explanation: i am doing the same brain pop and it was A so ‼️

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Alguien me pude decir una adivinanza o historia q la solución sea una ecuación de segundo grado completa????
Hitman42 [59]

Answer:

Una ecuación de segundo grado completa es algo como:

y = a*x^2 + b*x + c

Un problema tipico que usa ecuaciones de este tipo es algo que nos haga multiplicar dos términos como h*(x + k) y n*(x + j)

Donde h, k, n, y j son números reales.

Entonces planteemos el siguiente caso.

"Juan tiene una tabla rectangular, de tal forma que su largo es (x + 3cm), y el ancho es igual a dos veces su largo, si sabemos que el área de esta tabla es 95 cm^2 ¿cuál es el valor de x?"

Acá hay que recordar que para un rectángulo de largo L y ancho W, el área es:

A = L*W

En este caso tendremos:

L = (x + 3cm)

Y el ancho es dos veces eso, entonces:

W = 2*(x + 3cm)

Entonces el area de esta tabla se escribirá como:

A = (x + 3cm)*2*(x + 3cm)

Ahora solo tenemos que expandir eso:

A = 2*x^2 + 12cm*x + 18cm^2

Ahora sabemos que el area de esta tabla es 95cm^2

Entonces:

95cm^2 =  2*x^2 + 12cm*x + 18cm^2

0 = 2*x^2 + 12cm*x + (18cm^2 - 95cm^2)

0 = 2*x^2 + 12cm*x - 77 cm^2

Esta es una ecuación de segundo grado completa, la cual deberiamos resolver para encontrar el valor de x como se nos pide en el problema.

4 0
2 years ago
The refrigerator part of a refrigerator freezer has a volume of 27 cubic feet. The freezer part is 2 feet high, 2 feet deep, and
VLD [36.1K]
The answer is 39.
do 2x2x3 (answer is 12) then 27+12.
3 0
3 years ago
Ben claims that 12 is a factor of 24.how can you check whether he is correct?
Anna71 [15]

Divide the  24  by Ben's  12 . 

If his  12  is a factor, then the division will come out even,
and the answer will be a whole number.

A).  6 x 4 = 24

B).  5 x 9 = 45

C).  3 x 8 = 24

D).  6 x 9 = 54

8 0
3 years ago
Which of the following is equivalent to tan 5pie/6?<br>​
nataly862011 [7]

Answer: should be -1/ sqrt of 3. If it asks to rationalize it could be -sqrt of 3/3

Step-by-step explanation:

5 0
2 years ago
PLEASE HELP Complete the table below to find solutions to the linear equation y=5x+35.
Eddi Din [679]

Answer:

x | y | (x,y)

0 | 35 | (0,35)

3 | 50 | (3,50)

-7 | 0 | (-7,0)

Step-by-step explanation:

Given the equation: y = 5x + 35, to complete the table, plug in the value of x given in the table in each row, to find y.

When x = 0,

y = 5(0) + 35

y = 0 + 35

y = 35

(0,35)

When x = 3,

y = 5(3) + 35

y = 15 + 35

y = 50

(3,50)

When x = -7,

y = 5(-7) + 35

y = -35 + 35

y = 0

(-7,0)

6 0
3 years ago
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