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irina1246 [14]
3 years ago
7

Anthony Drew plans for a triangle porch determine if the triangle can be made justify your response​

Mathematics
1 answer:
garik1379 [7]3 years ago
3 0

The triangle cannot be made.

Solution:

Given sides of a triangle are 8 ft, 20 ft and 8 ft.

<u>To determine if the triangle can be made:</u>

Let us first define the triangle inequality theorem.

Triangle inequality theorem:

The sum of the lengths of the any two sides of a triangle is greater than the length of the third side.

Using this theorem, we can determine if the triangle can be made or not.

8 ft + 20 ft = 28 ft > 8 ft

20 ft + 8 ft = 28 ft > 8 ft

8 ft + 8 ft = 16 ft < 20 ft  

Here the sum of the two sides is less than 20 ft.

This is not satisfy the triangle inequality theorem.

Therefore, the triangle cannot be made.

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aliina [53]

Answer:

D

Step-by-step explanation:

Given

- 3 ÷ - \frac{2}{5}

Leave the first number, change division to multiplication and turn the fraction upside down, that is

= - 3 × - \frac{5}{2}

= \frac{3(5)}{2}

= \frac{15}{2}

= 7 \frac{1}{2} → D

3 0
3 years ago
Show that √(1-cos A/1+cos A) =cosec A - cot A​
Gennadij [26K]

Hi there!

\sqrt{\frac{1-cosA}{1+cosA}} =

We can begin by multiplying by its conjugate:

\sqrt{\frac{1-cosA}{1+cosA}} * \sqrt{\frac{1+cosA}{1+cosA}}  = \\\\\sqrt{\frac{(1-cosA)(1 + cosA)}{(1+cosA)(1 + cosA)}} =

Simplify using the identity:

1 - cos^2A = sin^2A

\sqrt{\frac{(1-cos^2A)}{(1+cosA)^2}} =\\\\\sqrt{\frac{(sin^2A)}{(1+cosA)^2}} =

Take the square root of the expression:

{\frac{sinA}{1+cosA} =

Multiply again by the conjugate to get a SINGLE term in the denominator:

{\frac{sinA}{1+cosA} * {\frac{1-cosA}{1-cosA} =\\

Simplify:

{\frac{sinA(1-cosA)}{1-cos^2A} =

Use the above trig identity one more:

{\frac{sinA(1-cosA)}{sin^2A} =

Cancel out sinA:

{\frac{(1-cosA)}{sinA}  =

Split the fraction into two:

{\frac{1}{sinA}   - \frac{cosA}{sinA} =

Recall:

1/sinA = cscA\\\\cosA/sinA = cotA

Simplify:

\frac{1}{sinA} + \frac{cosA}{sinA} = \boxed{cscA - cotA}

5 0
2 years ago
3 less than the quotient of 20 and x, write an algebraic expression
schepotkina [342]
\frac{20}{x}-3
4 0
3 years ago
Word problem: if the mayor weighed 240 pounds and he lost 75.9738 how Mitch does he weigh now?
Luden [163]
164.0262 that his weight
3 0
3 years ago
Read 2 more answers
Can you guys help again
dangina [55]

Answer:

Step-by-step explanation:

1 = 27

2 = 36

2 = 1,000

3 0
3 years ago
Read 2 more answers
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