The answer is a= -4.181818
<h3>
Answer: 48</h3>
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Explanation:
Triangle ABC is isosceles because AC = BC.
The angles opposite these congruent sides are angle ABC and angle BAC. These are the base angles.
For any isosceles triangle, the base angles are congruent.
Angle BAC = 69 degrees is given. So angle ABC = 69 as well.
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The missing angle must add to the two other angles so that all three angles in a triangle add to 180
(angle ABC) + (angle BAC) + (angle BCA) = 180
69 + 69 + (angle BCA) = 180
138 + (angle BCA) = 180
angle BCA = 180-138
angle BCA = 42
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Angle DCE is congruent to angle BCA because they are vertical angles.
Triangle DCE is a right triangle. The missing angle is 90-(angle BCA) = 90-42 = 48
angle EDC = 48 degrees
Answer:
173°
Step-by-step explanation:
supplementary angles add up to 180°
hence,180-7=173°
It's not entirely clear to me what you're trying to solve, but it looks like the initial equation is
First convert each term into a fraction with the same (i.e. the least common) denominator. The first term needs to be multiplied by <em>a</em> + 2; the second term by (<em>a</em> + 3) (<em>a</em> + 2); and the third term by <em>a</em> + 3 :
Now that everything has the same denominator, we can combine the fractions into one. Move every term to one side and join the numerators:
Simplify the numerator:
If neither <em>a</em> = -3 nor <em>a</em> = -2, we can ignore the denominator:
Solve for <em>a</em> :
