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4 years ago

Please let me know the answer ?A,B,CorD

Mathematics

1 answer:

ziro4ka [17]4 years ago

4 0

The answer is B because the equations would be X+Y=9.90 and 3.5X=Y solve using system of equations then plug it in the see if it works 3.5 x 2.20=7.70+2.20=9.90 Hope it helped :)

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Prove each of these identities.

Virty [35]

<h3>Answer:</h3>

➲ ( 1 + sec x )( cosec x - cot x ) = tan x

Solving for L.H.S

$\implies\quad \sf{(1+sec\:x)(cosec\:x-cot\:x) }$

$\implies\quad \sf{ \left(1+\dfrac{1}{cos\:x}\right)\left(\dfrac{1}{sin\:x}-\dfrac{cos\:x}{sin\:x}\right)}$

$\implies\quad \sf{ \left(\dfrac{1+cos\:x}{cos\:x}\right)\left(\dfrac{1-cos\:x}{sin\:x}\right)}$

$\implies\quad \sf{ \left(\dfrac{1-cos^2 x}{cos\:x.sin\:x}\right)}$

$\implies\quad \sf{ \left( \dfrac{sin^2 x}{cos\:x.sin\:x}\right)}$

$\implies\quad \sf{ \left( \dfrac{sin\:x.\cancel{sin\:x}}{cos\:x.\cancel{sin\:x}}\right)}$

$\implies\quad \sf{\left( \dfrac{sin\:x}{cos\:x}\right) }$

$\implies\quad\underline{\underline{\pmb{ \sf{tan\:x}}} }$

➲ ( 1+ sec x )( 1- cos x ) = sin x. tan x

Solving for L.H.S

$\implies\quad \sf{ ( 1+ sec\:x)(1-cos\:x)}$

$\implies\quad \sf{\left(1+\dfrac{1}{cos\:x} \right) \left( 1-cos\:x\right)}$

$\implies\quad \sf{ \left(\dfrac{cos\:x+1}{cos\:x} \right)(1-cos \:x)}$

$\implies\quad \sf{\dfrac{1-cos^2 x}{cos\:x} }$

$\implies\quad \sf{\dfrac{sin^2x}{cos\:x} }$

$\implies\quad \sf{sin\:x.\left( \dfrac{sin\:}{cos\:x}\right) }$

$\implies\quad\underline{\underline{\pmb{ \sf{sin\:x.tan\:x}}} }$

7 0

3 years ago

What is the satisfy the equation y=x+1/2

miss Akunina [59]

Answer:

Step-by-step explanation:

If you connect the dots, and extend the line outwards- you can see the values match to J. Also, if you plug the x values into the equation, you'd get the y values in j.

y = x + 1/2

6 1/2 = 6 + 1/2

etcetera

I hope this helped!

6 0

3 years ago

Label Each triangle.

nlexa [21]

Answer:

1.) isosceles

2.) equilateral

3.) obtuse

4.) right

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3 years ago

Please help me with..... A rectangular garden is 50 feet longer than it is wide its perimeter is 284 feet

zmey [24]

P=2 (l+w)
we know P=284
we also know that l= w+50
so replace l in the equation with w+50

284=2 (w+50+w)
284=2 (2w+50)
divide both sides by 2
142=2w+50
subtract 50 on both sides
98=2w
divide both sides by 2
49=w
so width is 49, and we need to add 50 to it to find the length
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3 years ago

A rational number can be written as the ratio of one blank to another and can be represented by a repeating or blank decimal

DaniilM [7]

A rational number can be written in the form:

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The number $q$ isn't equal to zero because the division by zero is not defined. So we can represent rational numbers by a repeating or terminating decimal, for instance in the following four exercises we have:

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3 years ago

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