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3 years ago

What is the value of 3/7 x 5/21

Mathematics

2 answers:

larisa86 [58]3 years ago

6 0

Answer:

5/49

Step-by-step explanation:

3/7 x 5/21=15/147=5/49

Verizon [17]3 years ago

5 0

Answer:

5/49

Step-by-step explanation:

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Math homework geometry please help

Ghella [55]

Answer:

Step-by-step explanation:

The theorem we use for this is

$a(a + b) = c(c + d)$

Solve for d.

$a(a + b) = c { }^{2} + cd$

$a(a + b) - {c}^{2}$

$\frac{a(a + b) - {c}^{2} }{c}$

A is the answer

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3 years ago

Sergeu [11.5K]

Answer:

0.33

Step-by-step explanation:

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4 years ago

NEED HELP ASAP PLEASEEEEE

kondaur [170]

A) x = 8
B) a = 80
C) y = 7
D) c = 12

Hope this helped! :)

6 0

3 years ago

Read 2 more answers

In a normally distributed data set a mean of 55 where 99.7% of the data fall between 47.5 and 62.5, what would be the standard d

NeX [460]

Given that normally distributed data set has a mean of 55 and 99.7% of data fall between 47.5 and 62.5.

Let s be the standard deviation of data set.

Since 99.7% data fall within 3 standard deviations of mean, z-value for 47.5 and 62.5 has an absolute value of 3.

That is |z|=3

But z= $\frac{x-mean}{standard deviation}$

Let us plugin x=47.5 and mean =55 and equate it to 3.

That is $|\frac{47.5-55}{s}| = 3$

$|\frac{-7.5}{s} | =3$

Since x is always positive ( being standard deviation), $|\frac{-7.5}{s} | = \frac{|-7.5|}{s} = \frac{7.5}{s}$

Hence $\frac{7.5}{s}= 3$

$s=\frac{7.5}{3} = 2.5$

We will get same value with 62.5 as well.

Hence standard deviation of data set is 2.5.

3 0

4 years ago

Solve using the quadratic formula. v2 + 11v + 18 = 0

Rzqust [24]

Answer:

Answer is given below with explanations

Step-by-step explanation:

${v}^{2} + 11v + 18 = 0 \\by factorization we get (v + 9)(v + 2) = 0 \\ v = - 9 \: \: or \: \: v = - 2$

HAVE A NICE DAY!

THANKS FOR GIVING ME THE OPPORTUNITY TO ANSWER YOUR QUESTION.

7 0

3 years ago