Use 80% *25 than you can get 20.
Answer:
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Answer:
19 coins
Step-by-step explanation:
We know that mean is the sum of all the elements divided by the number of elements there are: m = t/n, where m is the mean, t is the total sum, and n is the number of elements.
Here, we are given the mean number of coins for all 27 + 18 = 45 children is 16, so m = 16 and n = 45. Then:
m = t/n
16 = t/45
t = 720
This t means that the total number of coins that all the boys and girls have is 720 coins.
Now, we also know the mean number of coins for the boys only, which is 14. Since there are 27 boys, then:
m = t/n
14 = t/27
t = 378
This t means the total number of coins all the boys have.
Subtracting 378 from 720, we get 342, which is the total number of coins the girls have. We also know there are 18 girls, so:
m = t/n
m = 342 / 18 = 19
Thus, the mean is 19 coins.
Answer:
Step-by-step explanation:
Statements Reasons
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1. ∠V ≅ ∠Y Given
2. WZ bisects ∠VWY Given
3. ∠VWZ ≅ ∠YWZ Definition of Angle Bisector (2)
4. WZ ≅ WZ Reflexive Property
5. ΔVWZ ≅ ΔYWZ AAS Theorem (1,3,4)
**In case you didn't know the definitions**
Angle Bisector - A line, segment or ray that divides an angle into two congruent angles
Reflexive Property - X = X
AAS Postulate - If two angles and a non-included side of one triangle are congruent to the corresponding parts of another triangle, then the triangle's are congruent
