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Liono4ka [1.6K]
3 years ago
9

A certain company changes for teling a rectangular room include the cost of the material used and a flat rate of instalitation.T

e lenght of certain room is 2 fett more than with,and the company's chrages,in dollars,for tiling the room are 12.5x(x+2)+400
Mathematics
1 answer:
nika2105 [10]3 years ago
5 0

Answer:

nknknStep-by-step explanation:

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27a+1/2b=4 solve for a
sladkih [1.3K]

Answer:

a = 4/27 - b/54

Step-by-step explanation:

27a+1/2b=4

Subtract 1/2 b from each side

27a+1/2b - 1/2 b=4-1/2 b

27a = 4 - 1/2 b

Divide each side by 27

27a/27 = 4/27 - 1/2 b/27

a = 4/27 - b/54

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3 years ago
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Can someone rate my writing?<br><br>​
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Which congruency theorem can be used to prove
irina1246 [14]

Answer:

SAS

Step-by-step explanation:

Given: Two triangles ΔABD and ΔDCA,  

We have, AD=AD (normal)  

∠A=∠A (Given)  

BA=CD (Sides inverse to rise to points are consistently equivalent)  

With the SAS rule of congruency,  

ΔABD≅ΔDCA

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Complete the square for 3x^2-12x=9
larisa [96]

Answer:

The solutions are -0.65 and 4.65.

Step-by-step explanation:

3x^2 - 12x = 9

Divide both sides by 3

x^2 - 4x = 3

To make a square with "x^2 - 4x", you need to have a "+ 4" after it so it can be simplified as (x-2)^2.  So add 4 to both sides.

x^2 - 4x + 4 = 7

(x-2)^2 = 7

x - 2 = (square root) of 7

x = 2 (+/-) (square root) of 7.

x = {-0.65, 4.65}

The solutions are -0.65 and 4.65.

hope this helps:)sorry if it doesnt

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3 years ago
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