# The number that is 7 more then 9

Question
Algebra foundations
The number that is 7 more then 9

2020-12-15
Let xx be the number so that it is −9 plus 7 (which is meant by 7 more than −9):
x=−9+7
To add, start from −9 and move 7 units to the right on a number line which gives:
x=−2

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Fill in the bla?

An equation that expresses a relationship between two or more variables, such as $$H = \frac{9}{10} (20 - a)$$ is called a/an ? The process of finding such equations to describe real-world phenomena is called mathematical ? Such equations, together with the meaning assigned to the variables, are called mathematical ?

$$d=0.0212v^{\frac{7}{3}}$$