b is decreased by 25% which means there will be (-ve) sign.
<h3>So,</h3>

- <em>Option 5 is correct!!~</em>
We have to apply the simple interest formula:
I = p x r x t
Where :
I = interest
p = principal amount
r= interes rate ( in decimal form, percentage divided by 100)
t= time (years)
Replacing with the values given:
I = 750 x (7/100) x 3
I = 750 x 0.07 x 3
I = $157.7
There is more than one solution because there are two different numbers whose square is 9. One of them is +3. The other is -3.
The fundamental theorem of algebra says every non-zero single-variable polynomial of degree N has exactly N roots, counting multiplicity. Your polynomial is degree 2, so has 2 roots.
An equation is formed of two equal expressions. The solution of the equation is 41.
<h3>What is an equation?</h3>
An equation is formed when two equal expressions are equated together with the help of an equal sign '='.
The solution of the equation,
x + 21 = 62
x = 62 - 21
x = 41
Hence, the solution of the equation is 41.
Learn more about Equation:
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