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hoa [83]
3 years ago
13

What is the perimeter of a lawn that is 25 feet long and 20 feet wide?

Mathematics
2 answers:
Rama09 [41]3 years ago
7 0
A.90 feet

2(25)+2(20)
50+40
90
drek231 [11]3 years ago
4 0

Answer:

a. 90 ft

Step-by-step explanation:

20+20+25+25

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A. A batch of 30 parts contains five defects. If two parts are drawn randomly one at a time without replacement, what is the pro
Zarrin [17]

Answer:

a) For this case on the first trial we have the following probability of selecting a defective part: 5/30. Because we have 5 in total defective at the begin and a total of 30 parts

For the second trial since the experiment is without replacement we have 29 parts left, and since we select 1 defective from the first trial we have in total 4 defective left, so then the probability of defective for the second trial is : 4/29

And then we can assume independence between the events and we have this probability:

(5/30)*(4/29) =0.16667*0.1379= 0.0230

b) For this case on the first trial we have the following probability of selecting a defective part: 5/30. Because we have 5 in total defective at the begin and a total of 30 parts

And since we replace the part selected is the same probability for the second trial and then the final probability assuming independence would be:

(5/30)*(5/30) =0.1667* 0.1667= 0.0278

Step-by-step explanation:

For this case we know that we have a batch of 30 parts with 5 defective.

Part a

If two parts are drawn randomly one at a time without replacement, what is the probability that both parts are defective?

For this case on the first trial we have the following probability of selecting a defective part: 5/30. Because we have 5 in total defective at the begin and a total of 30 parts

For the second trial since the experiment is without replacement we have 29 parts left, and since we select 1 defective from the first trial we have in total 4 defective left, so then the probability of defective for the second trial is : 4/29

And then we can assume independence between the events and we have this probability:

(5/30)*(4/29) =0.16667*0.1379= 0.0230

Part b

If this experiment is repeated, with replacement, what is the probability that both parts are defective?

For this case on the first trial we have the following probability of selecting a defective part: 5/30. Because we have 5 in total defective at the begin and a total of 30 parts

And since we replace the part selected is the same probability for the second trial and then the final probability assuming independence would be:

(5/30)*(5/30) =0.1667* 0.1667= 0.0278

3 0
3 years ago
Which of the following equations describes the line shown below? Check all
nexus9112 [7]

Answer:

C and D

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

Calculate m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (- 3, - 6) and (x₂, y₂ ) = (9, 3) ← 2 points on the line

m = \frac{3+6}{9+3} = \frac{9}{12} = \frac{3}{4}

Using (a, b ) = (9, 3 ) , then

y - 3 = \frac{3}{4} (x - 9) → C

Using (a, b ) = (- 3, - 6 ), then

y - (- 6) = \frac{3}{4} (x - (- 3) ) , that is

y + 6 = \frac{3}{4} (x + 3) → D

4 0
3 years ago
X – 1= 4x + x - 8+ 3x
Advocard [28]

Answer:

1

Step-by-step explanation:

Add one on both sides, combine like terms and solve.

6 0
2 years ago
Can l please get help ​
maria [59]

Answer:

-10x^2 +9+8x^2-5x+7=-2x^2-5x+16

4 0
3 years ago
Determine whether the first phrase is a subset of the second phrase, or the second phrase is a subset of the first phrase, or ne
S_A_V [24]

Answer:

Kindly check explanation

Step-by-step explanation:

A subset simply refers to a set whose elements are all members of a larger set.

Going by the definition :

The set of people born in the U.S is a subset of the set of people who are U. S citizens because citizenship in the U. S is not only attained by birth.

The set of Java students are all members of the set containing students studying a programming language, hence, The set of students studying Java is a subset of the set of students studying a programming language because Java is just one of the many different types of programming languages

{FISH_IN_OCEAN} is a subset of of the set of animals living in Ocean because not only fishes live in the ocean, fish is just one of the diverse marine animals that exist.

4 0
3 years ago
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