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3 years ago

These are already solved but can someone explain how we got them, steps please! I really need it..

Mathematics

2 answers:

brilliants [131]3 years ago

4 0

Step-by-step explanation:

<h3>Sana makatulong correct me if I wrong</h3>

topjm [15]3 years ago

4 0

Answer:

1A,) 5x 2 and 3x are unlike terms and 9x 3 and 2x 2 are also unlike term

* so you have to put the like terms together to solve the equation

*then you say 9x 3 first because it is the biggest number (I think)

* then you put 5x 2 and 2x 2 together and 3x and x together too

* then you will get : 9x 3+ (5x 2 + 2x 2) + (3x -x)

:9x 3 + 7x 2 +2x

in algebra 3x -x is like saying 3-1 aka x is seen as 1 but the one is invisible

haha

and unlike terms are terms that do not have the same variables or powers while like terms are terms that have the same variables or powers

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Janet read a total of 14 books over 7 months.after belonging to the book club for 8 months,how many books will janet have read i

Zielflug [23.3K]

16 books because 14/7= 2, so 2 books per month. 2 times 8= 16. YOur answer

3 0

3 years ago

A conical container can hold 120π cubic centimeters of water. The diameter of the base of the container is 12 centimeters.

nignag [31]

Answer:

A. 10cm

B. 8 times

Step-by-step explanation:

The question is on volume of a conical container

Volume of a cone= $\pi r^{2} h/3$

where r is the radius of base and h is the height of the cone

Given diameter= 12 cm, thus radius r=12/2 =6 cm

$v=\pi r^2h/3 \\120\pi =\pi *6*6*h/3\\120\pi =12\pi h\\10=h$

h=10 cm

If height and diameter were doubled

New height = 2×10 =20 cm

New diameter = 2×12 = 24, r=12 cm

volume = $v=\pi r^2h/3\\v=\pi *12*12*20/3\\v=960\pi$

To find the number of times we divide new volume with the old volume

$N= 960\pi /120\pi \\\\N= 8$

8 0

3 years ago

Read 2 more answers

PLEASE HELP ASAP!! WILL MARK BRAINLIEST!!

kipiarov [429]

It’s B. Dan is 124 miles from home at noon and is traveling at 62 miles per hour

7 0

3 years ago

B. Subtract polynomials: (3x – 5 – 7x2) – (–2 + 6x2 – 5x)

Lapatulllka [165]

Answer:

$(3x-5-7x^{2} )-(-2+6x^{2} -5x)$

$step\:1: 3x-5-7x^{2} +2-6x^{2} +5x$

$step\:2:(-7x^{2} -6x^{2} )+(3x+5x)+[(-5+2)]$

$step\:3:-13x^{2} +8x-3$

<u>OAmalOHopeO</u>

7 0

3 years ago

What is 30% of 70. show your work<br>

mamaluj [8]

Answer: 21

Step-by-step explanation:

we have two simple equations:

1) 70=100%

2) x=30%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

70/x=100%/30%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 30% of 70

70/x=100/30

(70/x)*x=(100/30)*x - we multiply both sides of the equation by

70=3.33333333333*x - we divide both sides of the equation by (3.33333333333) to get x

70/3.33333333333=x

The fore, the answer is 21

8 0

4 years ago

Read 2 more answers