What is the sum of 81
2 answers:
You might be interested in
Answer:
<h2>height = 12 cm</h2>Step-by-step explanation:
Area of a triangle is given by
where
b is the base
h is the height
From the question
Area = 21 m²
The statement
The height of a triangle is 8 m more than the length of the base is written as
h = 8 + b
Make b the subject
That's
b = h - 8
Substitute the expression into the above formula and solve for the height
That's
Multiply through by 2
h² - 8h = 48
h² - 8h - 48 = 0
(h + 4)(h - 12) = 0
h + 4 = 0 h - 12 = 0
h = - 4 h = 12
Since the height cannot be a negative number we have the final answer as
<h3>height = 12 cm</h3>Hope this helps you
<span>- - Star to simplify both sides of the equation.
</span>
<span>- - Now you have top subtract 18 from both sides.
</span>
- - Solve:
<span>- - And divide both sides by -4.
- - Solve:
</span>
</span>
<span>- - Now you have top subtract 18 from both sides.
</span>
- - Solve:
<span>- - And divide both sides by -4.
- - Solve:
</span>