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Ilia_Sergeevich [38]
3 years ago
10

1)

Mathematics
1 answer:
AVprozaik [17]3 years ago
5 0
The answer to this is C.
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Which of the following is a true polynomial identity​
zhuklara [117]

Answer:

It's a.

Step-by-step explanation:

(a - 2b)^2 + 8ab

= a^2 - 4ab + 4b^2 + 8ab

= a^2 + 4ab + 4b^2.

((a + 2b)^2 = a^2 + 4ab + 4b^2.

6 0
3 years ago
Read 2 more answers
Find the area of a plane figure bounded by lines
natulia [17]

Answer: 4.5

<u>Step-by-step explanation:</u>

First, find the points of intersection by solving the system.

y = x² + 2x + 4

y = x + 6

Solve by substitution:

x² + 2x + 4 = x + 6   ⇒   x² + x - 2 = 0   ⇒   (x + 2)(x - 1) = 0   ⇒   x = -2, x = 1

Now, integrate from x = -2 to x = 1

\int\limits^1_2 {(x+6)-(x^{2}+2x+4) } \,    <em>the bottom of the integral is -2 </em>

= \int\limits^1_2 {x+6-x^{2}-2x-4 } \,

= \int\limits^1_2 {-x^{2}-x+2 } \,  

= \frac{-x^{3}}{3} - \frac{x^{2}}{2}+2x\int\limits^1_2 {} \,

= (\frac{-1^{3}}{3} - \frac{1^{2}}{2}+2(1)) - (\frac{-(-2)^{3}}{3} - \frac{(-2)^{2}}{2}+2(-2))

= (\frac{-1}{3} - \frac{1}{2} +2) - (\frac{8}{3} -\frac{4}{2} -4)

= \frac{-9}{3} + \frac{3}{2} +6

= -3 + 1.5 + 6

= 4.5


3 0
3 years ago
3x+4y=25<br> 3x-3y=-3<br> Following system of equations write answer as an ordered pair
Charra [1.4K]
3x+4y=25\\&#10;3x-3y=-3|\cdot(-1)\\\\&#10;3x+4y=25\\&#10;\underline{-3x+3y=3}\\&#10;7y=28\\&#10;y=4\\\\&#10;3x-3\cdot4=-3\\&#10;3x-12=-3\\&#10;3x=9\\&#10;x=3\\\\&#10;\boxed{(x,y)=(3,4)}&#10;
5 0
3 years ago
Find the value of the expression:<br><br><br><br> 56 ÷ 7 + 7 × 3
miv72 [106K]
First, you have to apply the order of operations. 

Division and multiplication come first here and they go from left to right. So, 

56/7 = 8 
7*3 = 21 
Then, the addition. 
8 + 21 = 29. 

So the value of your expression is 29.
3 0
3 years ago
Read 2 more answers
Al sumar un número entero con el doble de su sucesor, se obtiene un total de 44. ¿De qué número se está hablando?
Vlad [161]
Basado en lo que nos dieron en la pregunta podemos decir que:
1) x sea un numero entero 
2)x+1 sea el numero sucesor del anterior
3) los dos seran sumados y el total de la suma es 44
4) el numero sucesor es multiplicado por dos antes de ser sumado con el numero entero


Entonces tenemos:
x+2(x+1)=44 \\ x+2x+2=44 \\ 3x=42 \\ x=14

En este caso el numero del cual se esta hablando es 14 para comprobar

14+2(14+1)=44 \\ 14+2(15)=44 \\ 44=44
7 0
3 years ago
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