All categories

3 years ago

Need help plz help!!!

Mathematics

1 answer:

yawa3891 [41]3 years ago

4 0

Answer:

segment CD is congruent to segment EB

You might be interested in

What makes 13 as 7, 2352 as 16, 246 as 14, 200 as 16, and 1030 as 14. Binary is involved

Andrei [34K]

Answer:

Dunno

Step-by-step explanation:

Sorry :/

4 0

3 years ago

Find the number of elements in A 1 ∪ A 2 ∪ A 3 if there are 200 elements in A 1 , 1000 in A 2 , and 5, 000 in A 3 if (a) A 1 ⊆ A

lina2011 [118]

Answer:

a. 4600

b. 6200

c. 6193

Step-by-step explanation:

Let $n(A)$ the number of elements in A.

Remember, the number of elements in $A_1 \cup A_2 \cup A_3$ satisfies

$n(A_1 \cup A_2 \cup A_3)=n(A_1)+n(A_2)+n(A_3)-n(A_1\cap A_2)-n(A_1\cap A_3)-n(A_2\cap A_3)-n(A_1\cap A_2 \cap A_3)$

Then,

a) If $A_1\subseteq A_2, n(A_1 \cap A_2)=n(A_1)=200$ , and if $A_2\subseteq A_3, n(A_2\cap A_3)=n(A_2)=1000$

Since $A_1\subseteq A_2\; and \; A_2\subseteq A_3, \; then \; A_1\cap A_2 \cap A_3= A_1$

$n(A_1 \cup A_2 \cup A_3)=\\=n(A_1)+n(A_2)+n(A_3)-n(A_1\cap A_2)-n(A_1\cap A_3)-n(A_2\cap A_3)-n(A_1\cap A_2 \cap A_3)=\\=200+1000+5000-200-200-1000-200=4600$

b) Since the sets are pairwise disjoint

$n(A_1 \cup A_2 \cup A_3)=\\n(A_1)+n(A_2)+n(A_3)-n(A_1\cap A_2)-n(A_1\cap A_3)-n(A_2\cap A_3)-n(A_1\cap A_2 \cap A_3)=\\200+1000+5000-0-0-0-0=6200$

c) Since there are two elements in common to each pair of sets and one element in all three sets, then

$n(A_1 \cup A_2 \cup A_3)=\\=n(A_1)+n(A_2)+n(A_3)-n(A_1\cap A_2)-n(A_1\cap A_3)-n(A_2\cap A_3)-n(A_1\cap A_2 \cap A_3)=\\=200+1000+5000-2-2-2-1=6193$

8 0

2 years ago

What is the average amount of trail mix in each bag?

Ludmilka [50]

Answer:

4 1/4 and from all the 1/2 bags they=2 lb

8 0

3 years ago

The sum of two numbers is 8. The difference of the same two numbers is 4. What are the two numbers?

Kobotan [32]

Answer:

2 and 6

Step-by-step explanation:

2+6=8. 6-2=4.

5 0

2 years ago

Read 2 more answers

Which graph shows a linear relationship?

PilotLPTM [1.2K]

Answer:

Graph C

Step-by-step explanation:

Graph C shows a linear relationship

5 0

3 years ago

Read 2 more answers