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Annette [7]
3 years ago
6

Which expressions are equivalent to 4b? 1.b+2(b+2b) 2.3b+b 3.2(2b)

Mathematics
1 answer:
valentina_108 [34]3 years ago
8 0

Answer:

b+2(b+2b) = 7b so this is incorrect.

3b + b = 4b (correct)

2 * 2b = 4b (correct)

The answer is 3b + b and 2 (2b)

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If the mass of a material is 45 grams and the volume of the material is 11 cm^3, what would the density of the material be?
Nuetrik [128]

Answer:

Density of material would be 4.09 g/cm^3

units is g/cm^3

Step-by-step explanation:

Given: The mass of a material is 45 grams and the volume of the material is 11 cubic centimeter

Density is defined as mass per unit volume.

It is given by:

p= \frac{m}{V} where p is the density , m is the mass and V is the volume of the material respectively.

Here, Density is expressed in grams per centimeter cubed (g/cubic cm)

Here, m = 45 g , V = 11 cubic cm

We get;

p= \frac{45}{11} = 4.09 g/cm^3

therefore, density of a material would be, 4.09 g/cm^3

and its units is g/cm^3

7 0
3 years ago
If (x/100-1)(x/100+1)=kx^2-1 k=
Artist 52 [7]
(x/100-1)(x/100+1)=kx^2-1
(x/100-1)(x/100+1)=(x/100)^2 - 1^2 because it's a difference of squares ( (a-b)(a+b) = a^2-ab+ab-b^2 = a^2 - b^2):
(x/100)^2 - 1^2=kx^2 - 1
(x/100)^2 - 1=kx^2 - 1
(x/100)^2=kx^2
(x^2)/(100^2)=kx^2
1/(100^2)=k
1/10000=k
k=0.0001
3 0
3 years ago
What is the complete factorization of 36y2 − 1?
stiv31 [10]

Answer:

(6y+1)(6y-1)

Step-by-step explanation:

Difference of square (You may want to search it up if you want to learn more)

4 0
3 years ago
35 + 3 x n with n = 7
Vlad [161]
56 would be the answer
4 0
2 years ago
Read 2 more answers
The ________ could be used to describe a data set by itself, while ___________ would almost never be used to describe a data set
Alona [7]

The mean could be used to describe a data set by itself, while interquartile range would almost never be used to describe a data set by itself.

<h3>What is Descriptive statistics?</h3>

These are operations which are used to summarize certain characteristics a set of data has.

Mean and range deals with the full set of data while interquartile range measures just the middle half of the data and is denoted as option A.

Read more about Descriptive statistics here brainly.com/question/6990681

#SPJ1

8 0
1 year ago
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