Answer:
(x + 7)^2 = 64
Step-by-step explanation:
x^2 + 23x – 19 = 9x - 4
x^2 + 23x - 9x = -4 + 19
x^2 + 14x = 15 = 0
Completing the square:
(x + 14/2)^2 - (14/2)^2 = 15
(x + 7)^2 - 49 = 15
(x + 7)^2 = 64
Answer: 
Step-by-step explanation:
<u>Given equation</u>

<u>Add 4 on both sides</u>


<u>Multiply -5 on both sides</u>


Hope this helps!! :)
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Answer:
Perimeter = 86.4 (m)
Step-by-step explanation:
A square (with side x) has an area of 466.56 (m^2)
=> x^2 = 466.56
=> x = sqrt(466.56) = 21.6
=> Perimeter of this square: P = 4(x) = 4(21.6) = 86.4 (m)
Hope this helps!
Answer:

Explanation:

using associative property, separate

take common term, factorise

final answer

Answer:
Step-by-step explanation:
V = AREA × HIGHT
V =7 ×35
V= 245 m³