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4 years ago

Identify the like terms.

Mathematics

1 answer:

beks73 [17]4 years ago

8 0

Like terms are -3b and 4b. So, C.

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Can anyone help me... plz

Natasha2012 [34]

Hey i am will to help or at least try I will send you the answers I come up with u in a pm sis!

3 0

3 years ago

Set A of six numbers has a standard deviation of 3 and set B of four numbers has a standard deviation of 5. Both sets of numbers

Alenkinab [10]

Given:

$\sigma_A=3$

$n_A=6$

$\sigma_B=5$

$n_B=4$

$\overline{x}_A=\overline{x}_B$

To find:

The variance. of combined set.

Solution:

Formula for variance is

$\sigma^2=\dfrac{\sum (x_i-\overline{x})^2}{n}$ ...(i)

Using (i), we get

$\sigma_A^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{n_A}$

$(3)^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$9=\dfrac{\sum (x_i-\overline{x}_A)^2}{6}$

$54=\sum (x_i-\overline{x}_A)^2$

Similarly,

$\sigma_B^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{n_B}$

$(5)^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$25=\dfrac{\sum (x_i-\overline{x}_B)^2}{4}$

$100=\sum (x_i-\overline{x}_B)^2$

Now, after combining both sets, we get

$\sigma^2=\dfrac{\sum (x_i-\overline{x}_A)^2+\sum (x_i-\overline{x}_B)^2}{n_A+n_B}$

$\sigma^2=\dfrac{54+100}{6+4}$

$\sigma^2=\dfrac{154}{10}$

$\sigma^2=15.4$

Therefore, the variance of combined set is 15.4.

7 0

3 years ago

Plz help i will give brainliest

expeople1 [14]

These are the y intercepts
1. (0, 1/3)
2. (0, 26/3)

5 0

3 years ago

Read 2 more answers

Which pair of angles are alternate exterior angles of parallel lines v and w?

vampirchik [111]

Answer:

a and d

Step-by-step explanation:

v and w are parallel lines

R is the transversal

Alternate exterior means on the opposite sides of the transversal and outside of the parallel linea

a and d are alternate exterior angles

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2 years ago

Can someone help me learn to simplify these..? I’m very confused. Will mark Brainliest

ddd [48]

Answer:

The answer is 6 because 6 x 6 x 6 x 6 = 1296

Step-by-step explanation:

4 0

3 years ago