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2 years ago

SecA-tanA/secA+ tanA = ( secA-tanA)^2

Mathematics

1 answer:

miv72 [106K]2 years ago

5 0

Answer:

A = ...-5π ,-4π ,-3π, -2π, -π, 0, π, 2π, 3π, 4π, 5π....

A = {x ∈ N, πx}

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By what percent will a fraction change if its numerator is decreased by 20% and its denominator is decreased by 60%?

Vedmedyk [2.9K]

Answer:

The fraction will increase by 100%

Step-by-step explanation:

Say the fraction is x/y. The question is telling us to decrease x by 20% (i.e. 0.8x) and to decrease y by 60% (i.e. 0.4y):

$= \frac{0.8x}{0.4y}\\= 2 (\frac {x}{y})$

You can see that by applying these changes, the new fraction is actually double the old fraction (i.e. will increase by 100%).

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2 years ago

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I am Confusion!!! Help! It says the opposite of -60 that would be positive right... why would the answer be A and D?? Explain. (

Nataly_w [17]

Answer:

it would be a and d

Step-by-step explanation:

so you start from zero for a and it says its 60 dollars more then they thought it would be so it would be

for b

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2 years ago

Lim x-1 x³-2x²+3x-2/(2x^4-3x+1)

UkoKoshka [18]

Since the limit becomes the undetermined form

$\displaystyle \lim_{x\to 1} \dfrac{x^3-2x^2+3x-2}{2x^4-3x+1} \to \dfrac{0}{0}$

it means that both polynomials have a root at $x=1$ . So, we can fact both numerator and denominator:

$x^3-2x^2+3x-2 = (x-1)(x^2-x+2)$

$2x^4-3x+1 = (x-1)(2x^3+2x^2+2x-1)$

So, the fraction becomes

$\dfrac{(x-1)(x^2-x+2)}{(x-1)(2x^3+2x^2+2x-1)} = \dfrac{x^2-x+2}{2x^3+2x^2+2x-1}$

Now, as x approaches 1, you have no problems anymore:

$\displaystyle \lim_{x\to 1} \dfrac{x^2-x+2}{2x^3+2x^2+2x-1} \to \dfrac{2}{5}$

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2 years ago

The cost for making a telephone call from Vero beach to Miami is 37 cents for The first 3 minutes and 9 cents per each additiona

Vinvika [58]

Answer:

$0.90

Step-by-step explanation:

A 10-minute call exceeds the 3-minute initial period by 7 minutes. The initial period charge is 37¢. The additional minute charge is 7·9¢ = 63¢. Then the regular charge for that call is ...

37¢ +63¢ = 100¢ = $1.00

The 10% discount reduces the charge by ...

10% × $1.00 = $0.10

so the final cost of the 10-minute call is ...

$1.00 -0.10 = $0.90 . . . . . cost of the call

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2 years ago

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Find x so that l || m. state the converse used.

kenny6666 [7]

Answer:

$x = 12$

Converse: Alternate Interior Angles Converse

Step-by-step explanation:

By the Alternate Interior Angles Converse, if $(14x - 23) = (9x + 37)$ , then l || m.

Use the equation to solve for x as follows:

$14x - 23 = 9x + 37$

Subtract 9x from each side

$14x - 23 - 9x = 9x + 37 - 9x$

$5x - 23 = 37$

Add 23 to both sides

$5x - 23 + 23 = 37 + 23$

$5x = 60$

Divide both sides by 5

$\frac{5x}{5} = \frac{60}{5}$

$x = 12$

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2 years ago

SecA-tanA/secA+ tanA = ( secA-tanA)^2​

SecA-tanA/secA+ tanA = ( secA-tanA)^2