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2 years ago

Which two choices are equivalent to the fraction below?

Mathematics

1 answer:

Zielflug [23.3K]2 years ago

5 0

3/4 *2 = 6/8

3/4 *3 = 9/12

A & D are correct

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Mara brought 2/3 yard of yellow ribbon and 1/4 yard of blue ribbon. How many yards of ribbon did she buy all together?

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She bought 11/12 yards of ribbon

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2 years ago

A pendulum is set swinging. its first oscillation is through 30 and each succeeding oscillation is through 95% of the angle of t

Marat540 [252]

Answer-

After 76 swings the angle through which it swings less than 1°

Solution-

From the question,

Angle of the first of swing = 30° and then each succeeding oscillation is through 95% of the angle of the one before it.

So the angle of the second swing = $(30\times \frac{95}{100})^{\circ}$

Then the angle of third swing = $(30\times (\frac{95}{100})^2)^{\circ}$

So, this follows a Geometric Progression.

$(30,\ 30\cdot \frac{95}{100},\ 30\cdot (\frac{95}{100})^2............,0)$

a = The initial term = 30

r = Common ratio = $\frac{95}{100}$

As we have to find the number swings when the angle swept by the pendulum is less than 1°.

So we have the nth number is the series as 1, applying the formula

$T_n=ar^{n-1}$

Putting the values,

$\Rightarrow 1=30(\frac{95}{100})^{n-1}$

$\Rightarrow \frac{1}{30} =(\frac{95}{100})^{n-1}$

Taking logarithm of both sides,

$\Rightarrow \log \frac{1}{30} =\log (\frac{95}{100})^{n-1}$

$\Rightarrow \log \frac{1}{30} =(n-1)\log (\frac{95}{100})$

$\Rightarrow -1.5=(n-1)(-0.02)$

$\Rightarrow 1.5=(n-1)(0.02)$

$\Rightarrow n-1=\dfrac{1.5}{0.02}$

$\Rightarrow n-1=75$

$\Rightarrow n=76$

Therefore, after 76 swings the angle through which it swings less than 1°

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3 years ago

How do you find the perimeter of a square?

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You add all the sides together, a good way to remember it is "perimeter, plus"

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3 years ago

Read 2 more answers

Ey YukkiD, can you help me?

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The temperature was -12 degrees

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3 years ago

Find the value of the variable 125

Alexxx [7]

Answer: 55

The angles that measures 125 and y make a linear pair (equal 180)

So you just do 180-125 to get y

8 0

2 years ago