Answer:
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Step-by-step explanation:
<em>Question No 7</em>
Answer:
Please check the explanation.
Step-by-step explanation:
Show that 4x - x² - 7 is always negative.
Given
4x - x² - 7
4x - x² - 7 is always negative because:
- -x²-7 will alwas be negative for all the values of x,
- The value of - x² - 7 will always be less than 4x for all the values of x
Hence, 4x - x² - 7 is always negative
For example,
let suppose we enter x = 1

let suppose we enter x = -1

V = LWH
<span>V = 50 * 1 * 1</span>
45 = 3b + 69
Subtract 69 from both sides.
-24 = 3b
Divide both sides by 3.
-8 = b
b = -8
Answer:
Step-by-step explanation:
Each side of the square is s meters long.
By the Pythagorean Theorem,
length of diagonal = √(s²+s²) = √(2s²) = s√2 meters
s√2 = 11.3
s = 11.3/√2
perimeter = 4s = 45.2/√2 ≅ 31.96 meters