1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tatiyna
3 years ago
12

I need help please and thank you

Mathematics
2 answers:
Flura [38]3 years ago
8 0

Answer:

30.5

Step-by-step explanation:

The dimensions of figure EFGH are one half those of figure ABCD, thus

FG = 6 and GH = 6, thus

perimeter = 12.5 + 6 + 6 + 6 = 30.5

daser333 [38]3 years ago
7 0
37 is the answer of this. Hope this helps :)
You might be interested in
A horse ran 800 meters in 40 seconds , 1200 meters in 60 seconds , and 480 meters in 24 seconds . Is this a proportional relatio
frosja888 [35]

Answer:

This is a proportional relationship, the constant of proportionality is 20m/s and it represents that the horse can run 20 meters every second.  

Equation:  d = 20s, where d=distance and s=number of seconds.

Step-by-step explanation:

In order to find out whether this relationship is proportional, you need to see if the rate at which the horse runs is constant (the same).  If you look at the three sets of data (24, 480), (40, 800) and (60, 1200) where the pair is (seconds, meters), you can see that for any two sets of data the change in meters divided by the change in seconds is consistently 20m/s.  For example:

\frac{1200-800}{60-40}=\frac{400}{20}=20

Since the constant is 20, we know that the horse can run 20 meters every second.  To find the horse's total distance, we need to multiply the rate by the number of seconds that it runs:

d = 20s

8 0
3 years ago
The second hand of a clock makes a full revolution once every minute. What is its angle of rotation after 20 seconds? After 45 s
nikklg [1K]
360/60 = 6

6 degrees every second

6*20 = 120 degrees


120 degrees after 20 seconds


6 * 45 = 270

270 degrees after 45 seconds


Hope I helped!

Let me know if you need anything else!

~ Zoe
7 0
3 years ago
Let A, B, C and D be sets. Prove that A \ B and C \ D are disjoint if and only if A ∩ C ⊆ B ∪ D
ANEK [815]

Step-by-step explanation:

We have to prove both implications of the affirmation.

1) Let's assume that A \ B and C \ D are disjoint, we have to prove that A ∩ C ⊆ B ∪ D.

We'll prove it by reducing to absurd.

Let's suppose that A ∩ C ⊄ B ∪ D. That means that there is an element x that belongs to A ∩ C but not to B ∪ D.

As x belongs to A ∩ C, x ∈ A and x ∈ C.

As x doesn't belong to B ∪ D, x ∉ B and x ∉ D.

With this, we can say that x ∈ A \ B and x ∈ C \ D.

Therefore, x ∈ (A \ B) ∩ (C \ D), absurd!

It's absurd because we were assuming that A \ B and C \ D were disjoint, therefore their intersection must be empty.

The absurd came from assuming that A ∩ C ⊄ B ∪ D.

That proves that A ∩ C ⊆ B ∪ D.

2) Let's assume that A ∩ C ⊆ B ∪ D, we have to prove that A \ B and C \ D are disjoint (i.e.  A \ B ∩ C \ D is empty)

We'll prove it again by reducing to absurd.

Let's suppose that  A \ B ∩ C \ D is not empty. That means there is an element x that belongs to  A \ B ∩ C \ D. Therefore, x ∈ A \ B and x ∈ C \ D.

As x ∈ A \ B, x belongs to A but x doesn't belong to B.  

As x ∈ C \ D, x belongs to C but x doesn't belong to D.

With this, we can say that x ∈ A ∩ C and x ∉ B ∪ D.

So, there is an element that belongs to A ∩ C but not to B∪D, absurd!

It's absurd because we were assuming that A ∩ C ⊆ B ∪ D, therefore every element of A ∩ C must belong to B ∪ D.

The absurd came from assuming that A \ B ∩ C \ D is not empty.

That proves that A \ B ∩ C \ D is empty, i.e. A \ B and C \ D are disjoint.

7 0
3 years ago
you are at the store buying milk and eggs and you want to know if you have enough money to pay for them should you estimate or e
scoundrel [369]

Answer:

Estimate on the higher side

Step-by-step explanation:

Round up, not down, because A, you might miss a number, or B, you forget taxes.

-hope it helps

5 0
2 years ago
Read 2 more answers
What role did monasteries play in the spread of Christianity? Choose three correct answers.
Daniel [21]

Answer:

They educated people. They cared for sick villagers. They helped feed people who lived in poverty.

Step-by-step explanation:

I just got it correct.

Hope this helps! ^^

Sorry that I probably didn't help you in time!

8 0
2 years ago
Read 2 more answers
Other questions:
  • A square is 3.2 millimeters (mm) on each side. What is the area of the square?
    15·2 answers
  • Helpppp someone !!! It’s due midnight tonight .
    14·1 answer
  • 15. Find the length of segment DE of the triangle ABC.
    9·1 answer
  • Give two real-world situations that could be represented by the value 30
    8·1 answer
  • The shirt you want to buy is 15% off from $32.50. How much will your shirt be?
    8·2 answers
  • What is one formula for calculating the surface area of a rectangular prism
    10·1 answer
  • (Fill in the blank)<br> Solve the following equation.
    8·2 answers
  • A university is applying classification methods in order to identify alumni who may be interested in donating money. The univers
    14·1 answer
  • What is the value of 25 - 14 +12?
    10·1 answer
  • Meena bought headphones online for $33. She used a coupon code to get a 20% discount. The website also applied a 5% processing f
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!