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Debora [2.8K]
3 years ago
13

What is mental mathematics

Mathematics
2 answers:
timurjin [86]3 years ago
7 0
Doing math in your head - being able to work out a math problem without writing it down
taurus [48]3 years ago
6 0
<span>It is the ability's to work sum in your head is an important skill primary students must develop throughout the key stages.
</span>
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8(3 - 2x) + 4x is an example of
Kruka [31]

Answer:

That is a Multi Step Equation

7 0
4 years ago
A rectangular athletic field is twice as long as it is wide. If the perimeter of the athletic field is 96 ​yards, what are its​
Pachacha [2.7K]
Width = x
length = 2x

96 = x + x + 2x + 2x
96 = 6x
x = 16

2x is simply 16 × 2.
8 0
3 years ago
Using the results from parts D through G, write an expression that represents the number of years elapsed between the disappeara
nlexa [21]

The mathematical expression to represent the number of years elapsed since the disappearance of Helike until the end of the American Civil War is:

  • T (years from Helike's disappearance to the end of the Civil War) = w + 373

To reach this conclusion we had to search for additional information and found that the year of the disappearance of the Greek city of Helike is -⅕ times the year the American Civil War ended.

  • Helike's disappearance year = (-w / 5)

According to the previous expression, the year of Helike's disappearance is:

  • Helike's disappearance year = (-1865/5) = -373

According to the previous data, it can be inferred that the expression that represents the number of years elapsed between the disappearance of the Greek city of Helike and the end of the US Civil War is:

  • T = w + 373
  • T = 1865 + 373
  • T = 2238

Note: This question is incomplete because the is some information missing. However, I can answer it based on my prior knowledge.

Learn more about Civil War in: brainly.com/question/14234520

3 0
3 years ago
Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the corre
4vir4ik [10]
I hope this helps you

8 0
3 years ago
Read 2 more answers
please help me i have a huge science test that i have to study for after this so PLEASE HELP ME GET THE ANSWER
enot [183]
Usually, quadratic equations equal 0, and to find the solution you need to make x equal the value that, when added or subtracted to the rest of its bracket, makes 0. This means that your answer is (x + 5)(x - 2) = 0, because 5 - 5 = 0 and 2 - 2 = 0. I hope this helps! Let me know if you would like me to explain further :)
4 0
3 years ago
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