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Sergeeva-Olga [200]
3 years ago
15

Please help 7th grade math question? URGENT! awarding brainliest!

Mathematics
1 answer:
Ivenika [448]3 years ago
4 0

correct Option is B i.e, 72x^2+288x^2-216x whose simplified form is: 360x^2-216x

Step-by-step explanation:

We need to solve the expression:

2[(6x)(6x)]+4[(12x - 9)(6x)]

Solving:

2[(6x)(6x)]+4[(12x - 9)(6x)]\\=2[36x^2]+4[(12x*6x)-(9*6x)]\\=72x^2+4[72x^2-54x]\\=72x^2+288x^2-216x\\=360x^2-216x

So, correct Option is B i.e, 72x^2+288x^2-216x whose simplified form is: 360x^2-216x

Keywords: Surface area of the rectangular prism

Learn more about surface area of the rectangular prism at:

  • brainly.com/question/12613605
  • brainly.com/question/6443737
  • brainly.com/question/3306327

#learnwithBrainly

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Explain how you can determine the annual percent increase when looking at an exponential function for a city population . Answer
Andru [333]

Answer:

The annual increase in the percentage of a pollution can be determined by some mathematical calculation.

Step-by-step explanation:

  • In order to determine the annual percentage increase over one year for a city population, we must do the following,
  • First we must subtract starting value that is the initial population of the city  at the starting of the year from the final value that is the final population of the city at the end of the year.
  • Now divide the whole by the starting value.
  • This gives you the value of increase in the rate of growth, Now inorder to obtain it in percentage format, we must multiply the resultant value by 100.

This finally gives you the rate of increase in the population in percentage.

5 0
4 years ago
8th grade math please show work
ehidna [41]

Answer:

the answer is d

Step-by-step explanation:

if you take leg cb and leg fe, the leg cb is 2.5 times larger than leg fe.

7 0
3 years ago
5.<br> Evaluate f(x) = -2x2 -4 for x = 3.<br> O -10<br> O -18<br> 10<br> -22
Gekata [30.6K]

Answer:

-22

Step-by-step explanation:

f(x) = -2x^2 - 4 for x = 3

f(3) = -2(3)^2 - 4

f(3) = -2(9) - 4

f(3) = -18 - 4

f(3) = -22

Answer: -22

8 0
3 years ago
∣∣x+34∣∣=−11, How do you solve this
VMariaS [17]

Answer:

The answer is No Solutions

Step-by-step explanation:

Since this is absolute value, we know the answer has to be positive, because distance has to be positive. We see it is negative, and that cannot be, so the answer is no solutions.

3 0
3 years ago
If f(x) = x² - 2x, find:<br> ƒ(6) = [ ? ]
zhannawk [14.2K]

<u>Answer:</u>

24

<u>Step-by-step explanation:</u>

To find ƒ(6), we have to substitute x = 6 into the expression for ƒ(x):

ƒ(6) = (6)² - 2(6)

      = 36 - 12

      = 24

7 0
2 years ago
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