Mathematics: Let Which equation is equivalent to A.) B.) C.) D.)

To solve this problem you must apply the proccedure shown below: 1. You have that the area of the room is: 2. The width of the carpet in feet is: 3.Now, to find the length of the carpet needed, you must apply the formula for calculate the area of a rectangle and solve for the length, as following: The answer is:...

Let Which equation is equivalent to A.) B.) C.)

Ответ:

jenn4887

30.01.2022

Mathematics

${m}^{2} +7m + 28 = 0$

Step-by-step explanation:

Given that,

$m = {x}^{2} + 3$

We know that,

${x}^{2} = m- 3$

Now look at the sum

$( {x}^{2} + 3) ^{2} + 7 {x}^{2} + 21 = - 10 \\$

$( {x}^{2} + 3) ^{2} + 7 {x}^{2} + 21 = - 10 \\ {m}^{2} + 7 \times m- 3 + 21 = - 10 \\ {m}^{2} +7m + 18= - 10 \\ {m}^{2} + 7m + 18+ 10 = 0 \\ {m}^{2} + 7m + 28 = 0$

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Ответ:

sophiamoser

30.04.2020

Mathematics

To solve this problem you must apply the proccedure shown below:
1. You have that the area of the room is:
$A=(27ft)(32ft) \\ A=864 ft^{2}$
2. The width of the carpet in feet is:
width=2.25 ft

3.Now, to find the length of the carpet needed, you must apply the formula for calculate the area of a rectangle and solve for the length, as following:
$A=(lenght)(width) \\ 864 ft^{2} =(lenght)(2.25 ft) \\lenght= 864 ft^{2}/(2.25 ft) \\ length=384 ft \\ length=128 yards$
The answer is:

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Let $m=x^{2}+3$ Which equation is equivalent to $(x^{2}+3)^{2} +7x^{2} +21=-10$

A.) $m^{2}-7m+10=0$
B.) $m^{2}-7m+31=0$
C.) $m^{2}+7m+10=0$
D.) $m^{2}+7m+31=0$

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