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3 years ago

The perimeter of an equilateral triangle is 21cm, find its length

Mathematics

2 answers:

Margarita [4]3 years ago

7 0

Answer:

7cm is the length for each side of an equalateral triangle

Talja [164]3 years ago

3 0

Answer:

7 cm

Step-by-step explanation:

An equilateral triangle has all sides equal.

To find the measure of the side, simply divide the perimeter by 3. This is because a triangle has 3 sides.

21 ÷ 3 = 7

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Each unit on the grid stands for one miles determine two ways to calculate the distance from josie's house to annies

Novosadov [1.4K]

I encountered this problem before but it had an accompanying image and list of answer choices.

I'll attach the image and include the list of options.

Each unit on the grid stands for one mile. Determine two ways to calculate the distance from Josie's house to Annie's house.
A) Distance Formula and Slope Formula
B) Midpoint Formula and Slope Formula
C) Distance Formula and Midpoint Formula
D) Distance Formula and Pythagorean Theorem

My answer is: D.) Distance formula and Pythagorean Theorem.

When looking at the image, I can visualize a right triangle. I'll simply get the measure of the long and short legs and solve for the hypotenuse.
Since the distance formula is derived from the Pythagorean theorem, it can be used to determine the distance from Josie's house to Annie's house.

8 0

3 years ago

What is the undefined value of 3b^2+13b+4/b+4 ? O 4 O 0 O -3 O -4

exis [7]

Answer:

Step-by-step explanation:

when you divide anything by 0 it becomes undefined

4 0

3 years ago

1. Rosie receives P100.00 daily allowance given by her parents. She spends P15.00 for transportation, P50.00 for snacks and she

jonny [76]

Answer:

10101001199191919191i2

7 0

3 years ago

Read 2 more answers

Thirty-eight and ninety seven hundredths in standard form

mr_godi [17]

Thirty-eight is 38

Ninety seven hundredths is 0.97

So the whole thing would be 38.97

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3 years ago

Read 2 more answers

21% of adults would pay more for environmentally friendly products. You randomly select 10 adults. Find the probability that th

ElenaW [278]

Answer: a) 0.3011

b) 0.3526

c) 0.6455

Step-by-step explanation:

Given : The proportion of adults would pay more for environmentally friendly products : p= 0.21

Sample size : n= 10

Let x be a binomial variable that denotes the number of adults would pay more for environmentally friendly products.

Using binomial distribution, $P(x)=^nC_xp^x(1-p)^{n-x}$

a) The probability that the number of adults who would pay more for environmentally friendly products is exactly 2 will be :-

$P(x=2)=^{10}C_2(0.21)^2(1-0.21)^{10-2}\\\\=\dfrac{10!}{2!(10-2)!}(0.21)^2(0.79)^8\approx0.3011$

The probability that the number of adults who would pay more for environmentally friendly products is exactly 2=0.3011

b) The probability that the number of adults who would pay more for environmentally friendly products is more than two will be :-

$P(x>2)=1-P(x\leq2)=1-(P(x=0)+P(x=1)+P(x=2))\\\\=1-(^{10}C_0(0.21)^0(1-0.21)^{10}+^{10}C_1(0.21)^1(1-0.21)^{9}+0.3011)\\\\=1-((0.79)^{10}+(10)(0.21)(0.79)^9+0.3011)\\\\=1-(0.0946+0.2517+0.3011)\\\\=1-0.6474=0.3526$

The probability that the number of adults who would pay more for environmentally friendly products is more than two =0.3526

c) The probability that the number of adults who would pay more for environmentally friendly products is between two and five, inclusive will be :-

$P(2\leq x\leq5)=P(x=2)+P(x=3)+P(x=4)+P(x=5)\\\\=0.3011+^{10}C_3(0.21)^3(1-0.21)^7}+^{10}C_4(0.21)^4(1-0.21)^{6}+^{10}C_5(0.21)^5(1-0.21)^{5})\\\\=0.3011+\dfrac{10!}{3!7!}(0.21)^3(0.79)^7+\dfrac{10!}{4!6!}(0.21)^4(0.79)^6+\dfrac{10!}{5!5!}(0.21)^5(0.79)^5\\\\=0.3011+0.2134+0.0993+0.0317=0.6455$

The probability that the number of adults who would pay more for environmentally friendly products is between two and five, inclusive =0.6455

4 0

3 years ago