Answer:
The mean average of all "six" students is 36.83.
Step-by-step explanation:
Mean:
The mean is the sum of all scores divided by the number of scores.
A group of five students have a mean test score of "34.2." Another student has a score of 50.
This means that the sum is given by:
What is the mean average of all "six" students?
Sum of 6 students is 221. So
The mean average of all "six" students is 36.83.
Answer:
∠YDC measures 140°.
Step-by-step explanation:
We can consider using the Exterior Angle Theorem. According to the theorem, the exterior angle of a triangle is equal to the two opposite interior angles.
In other words:
Substitute:
Solve for <em>x</em>. Combine like terms:
Simplify:
And divide. Hence, the value of <em>x</em> is:
∠YDC is given by:
Since we now know the value of <em>x</em>, substitute and evaluate:
In conclusion, ∠YDC measures 140°.