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Shalnov [3]
3 years ago
6

Explain how estimating helps you check the reasonableness of your answer

Mathematics
1 answer:
Mumz [18]3 years ago
5 0
It gets you closer to your answer.
Ex: 11×2-- Round 11 to 10 and then multiply and get 20. But if you get some answer like 50, you know it is wrong. But the answer is 23
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If you could help that would be nice!
Arturiano [62]
6 + 4 + 4 = 14 cm
2 * pi * r = 
2 * 3.14 * 3 = 18.84 / 2 = 9.42
14 + 9.42 = 23.42
5 0
3 years ago
Read 2 more answers
Evaluate the expression 8-5xy^3 for x=3 and y = -2
Elanso [62]

Answer:

128

Step-by-step explanation:

8 - 5 x 3 x -2^3

8 - 5 x 3 x -8

8 - 15 x -8

8 - -120

128

6 0
3 years ago
Read 2 more answers
What is the twentieth term of the arithmetic sequence described by the<br> equation an= 3n - 10?
sergij07 [2.7K]

Answer:

The twentieth term is 50.

Step-by-step explanation:

The equation that describes the arithmetic sequence describes it's "general term", which means that all the numbers in that sequence must follow that equation. For instance, if we want to find the first term of the sequence we must make a = 1 and we have:

a1 = 3*1 - 10

a1 = -7

Therefore to find the twentieth term we need to make n equal to 20. This is done below:

a20 = 3*20 - 10

a20 = 60 - 10

a20 = 50

The twentieth term is 50.

8 0
4 years ago
Can someone help me ASAP!!!
Dmitry_Shevchenko [17]

Answer:

3x+y=2

Step-by-step explanation:

Just remember that standard form is expressed as Ax+By=C. I also attached a picture to prove that 3x+y=2 is the standard form equation that makes up the line.

Hope this helps and answers your question :)

8 0
3 years ago
What number must you add to complete the square?<br> x^2 + 12x = 16
dmitriy555 [2]

Answer: B. 36

The complete square is (x+6)^2. It's missing the third term, which is 36 because 6 x 6 is 36.

7 0
4 years ago
Read 2 more answers
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