Answer:
16%
Step-by-step explanation:
$85 - $71.40 = $13.60

= 16%
Answer:
Solution given:
a = 12, b = 5, c = 9
We have
: a² = b² + c² – 2bc cos A
12²=5²+9²-2×5×9 cos A
12²-25-81=-90 cos A
cos A=38/-90
A=cos -1(-19/45)
<u>A=115</u>°
<u> </u><u>is</u><u> </u><u>a</u><u> </u><u>required</u><u> </u><u>answer</u><u>.</u><u />
<u>Given:</u>
An isosceles trapezoid has a perimeter of 37 centimeters. Its shorter base measures 3 centimeters and its longer base measures 4 centimeters. The two remaining sides have the same length.
We need to determine the lengths.
<u>Length of the remaining sides:</u>
Let the length of the sides of the isosceles trapezoid be x.
Let a be the length of the shorter base.
Let b be the length of the longer base.
Thus, we have;

The formula to determine the length of the sides is given by

Substituting the values, we get;




Thus, the length of the sides of the isosceles trapezoid is 15 centimeters.
You have to find the least common denominator then compare numerators after you determine the factor by which you must multiply your denominators by in order to make them equal. Then apply the same factor to the numerators.