Answer:
2:1
Step-by-step explanation:
Look at two corresponding sides in the triangles. The sides measuring 20 and 10 are corresponding sides.
20:10 = 2:1
The scale factor from triangle ABC to triangle DEF is 2:1.
The elements of the set S are Tennessee, South Carolina, Florida, and Alabama.
<h3>What is a set?</h3>
A set is a collection of well-defined items or objects.
The items that are found in a set are called the elements of the set.
For example, given a set S, which is the set of states in the U.S. that border Georgia.
The US state Georgia is bordered by Tennessee in the north, South Carolina and the Atlantic Ocean in the east, Florida in the south, and Alabama in the west.
Therefore, the elements of the set S = Tennessee, South Carolina, Florida, and Alabama.
In conclusion, a set consists of well-defined items.
Learn more about sets at: brainly.com/question/2166579
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Note that x is measured in radians.
The percent difference or error between sin(x) and tan(x) is calculated as

We want this percent difference to be less than 10.4%.
Because tan(x) > sin(x) for small values of x, define

From the calculator, obtain
sec⁻¹ 1.104 = 0.4375
Answer: x = 0.4375 radians
The Second page answer is C and the first page is m/c = c/m
Answer:

Step-by-step explanation:
3 envelopes having 2 red card
2 envelopes having 1 red card and 1 black card
1 envelope having 2 black cards
We are given that . An envelope is selected at random and a card is withdrawn and found to be red.
So, No. of ways of envelope having red card = 3+2 = 5
No. of required ways of envelope having 1 red card and 1 black card = 2
So, probability of getting an envelope having 1 red card and 1 black card = 
Hence The chance the other card is black is 