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Sergeeva-Olga [200]
2 years ago
6

I need help with this please

Mathematics
1 answer:
Alex2 years ago
3 0

Answer:

650 cm²

Step-by-step explanation:

Use the formula 2(lw+wh+lh)

Plug in the stuff: 2(5*9+9*20+5*20)=2(45+180+100)=2(325)=650 cm²

And there you go!

Please mark brainliest!

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goblinko [34]

Answer:

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8 0
3 years ago
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What's the missing sequence of 37 40 123 ? 372 1116 <br>​
erica [24]

Answer:

369

Step-by-step explanation:

37 + 3 = 40

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and so on

6 0
2 years ago
2 different questions
spin [16.1K]

Answer:

950 and 950

Step-by-step explanation:

Lets just get this done :

10 x 50 = 500

9 x 50 = 450

500 + 450 =

950

---

20 x 50 = 1000

1000 - 50 = 950

Hope this helps!

5 0
3 years ago
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The difference between an observational study and an experiment is that:
yulyashka [42]

Answer:

B

Step-by-step explanation:

An experiment is a study carried out in a controlled environment where the person undertaking the research hopes to understand cause and effect between the independent and dependent variables. An example of a experiment is the palovian experiment

The independent variable is the variable that the person carrying out an experiment changes or manipulates. the independent variable usually have a direct effect on the dependent variable

The dependent variable is the variable that is being measured in an experiment. It is usually affected by the independent variable

Observational study is the study where the researcher observes and measures cause and effect between independent and dependent variables without trying  to control or influence the population

4 0
2 years ago
The tendency of an object in motion to stay in motion or an object at rest to stay at rest is called _____.
nevsk [136]

Answer:

Step-by-step explanation:

momentum

4 0
3 years ago
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