The simplified form of the given expression
is
.
<h3>How to simplify a fractional expression?</h3>
The steps to simplify a fractional expression are:
- Factorize the expressions both in the numerator and the denominator using different methods
- Remove the common terms in the numerator and denominator
- Thus, the simplified expression will be obtained.
<h3>Calculation:</h3>
The given expression is 
Factorizing the numerator:
x² - 4x - 21 = x² - 7x + 3x - 21
= x(x - 7) + 3(x - 7)
= (x - 7)(x + 3)
Then,
= 
common factor (x + 3) is canceled out from both the numerator and the denominator
So,
= 
Therefore, the simplified expression is
.
Learn more about simplifying an expression here:
brainly.com/question/13742517
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A= hbb 2 Hope this helps! ;D
y = 10.25 x
The constant of proportionality is 10.25
The minimum amount of wrapping material needed to cover a biscuit would be equal to the biscuit area. The biscuit is spherical/circle, so the area would be <span>using circle formula. If the area is 200,96, the radius would be:
circle area = </span><span>π * r * r
200.96= 3.14 * r^2
r^2=</span>200.96/3.14
r= √64= 8
The diameter would be:
diameter = radius *2
diameter= 8*2= 16
Donde esta la foto para poder ayudarte ??