2 years ago

Please help quickly!! will give branliest

Mathematics

2 answers:

Crazy boy [7]2 years ago

5 0

Answer:

Step-by-step explanation:

hope this helped have a nice day

Margarita [4]2 years ago

5 0

The answer is 10 I hope this helped

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In one lottery, a player wins the jackpot by matching all five numbers drawn from white balls (1 through 43) and matching the nu

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This can be found by finding 44 chosen 5 at a time times 1/32.
That would be
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3 years ago

Dave collects U.S. gold coins. He has collection of 48 coins. Some are $10 coins, and the rest are $20 coins. If the face value

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2 years ago

If x^2+1/x^2=3 find the value of x^2/(x^2+1)^2<br> Express answer as a common fraction.<br> Thanks!!

timama [110]

$x^2+\dfrac1{x^2}=3\implies x^4+1=3x^2\implies x^4-3x^2+1=0$

By the quadratic formula,

$x^2=\dfrac{3\pm\sqrt5}2\implies x^2+1=\dfrac{5\pm\sqrt5}2$

Then

$(x^2+1)^2=\dfrac{25\pm10\sqrt5+5}4=\dfrac{15\pm5\sqrt5}2$

$\implies\dfrac{x^2}{(x^2+1)^2}=\dfrac{\frac{3\pm\sqrt5}2}{\frac{15\pm5\sqrt5}2}=\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}$

Multiply numerator and denominator by the denominator's conjugate:

$\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}\cdot\dfrac{15\mp5\sqrt5}{15\mp5\sqrt5}=\dfrac{45\pm15\sqrt5\mp15\sqrt5-25}{15^2-(5\sqrt5)^2}=\dfrac{20}{100}=\dfrac15$

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3 years ago

In an art class, there are 32 pens to 40 brushes. What is the ratio of pens to brushes written as a fraction in simplest form?

alisha [4.7K]

The answer is 32/40

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3 years ago

PLEASE HELP ASAP!!!!!!!!!

viva [34]

Answer:

A: 5:1

B. 2:10

Step-by-step explanation:

Please mark brainliest!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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3 years ago