If (fx)=5x, what is f^-1(x)
1 answer:
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Answer:
Option (3)
Step-by-step explanation:
By applying cosine rule in the triangle ABC,
BC² = AC² + AB² - 2(AC)(AB)cosA
5² = 3² + 7²- 2(3)(7)cosA
25 = 9 + 49 - 42cos(A)
25 = 58 - 42cos(A)
cos(A) =
A =
A = 38.21°
A ≈ 38°
Option (3) will be the correct option.
The compound interest will be equal to $13.57.
<h3>What is compound interest?</h3>The interest on a loan or deposit that accrues on both the initial principal and the accumulated interest from prior periods is known as compound interest.
The compound interest will be calculated by:-
CI = $13.57
Therefore the compound interest will be equal to $13.57.
To know more about Compound interest follow
#SPJ1
<h2>angle in triangle</h2>
because the triangle above is an isosceles triangle, then both angles are of the same value.
and one thing you should know, the angle above shows the straight angle.
<em>so the sum of all angles is 180</em><em>°</em>
<u>can be written like </u><u>this</u><u> </u><u>:</u>
(5x+13)°+(3x+7)°=180°
5x + 13 + 3x + 7 = 180
8x + 20 = 180
8x = 180 - 20
8x = 160
x = 20
<em>(*the third choice is correct)</em>