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vampirchik [111]
3 years ago
10

Add or subtract mentally 16.9+ 12.1

Mathematics
2 answers:
saul85 [17]3 years ago
7 0
When you add it mentally you'd get 29
When you subtract it mentally you'd get 4.8
Ostrovityanka [42]3 years ago
6 0
Well, just add or subtract it form the back and work your way to the front, and you have to remember what the digit was.

16.9 + 12.1 = 29
16.9  - 12.1 = 4.8
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eduard

Answer:

Choice 3

Step-by-step explanation:

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2 years ago
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Answer:

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Step-by-step explanation:

Calculate the distance using the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

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ivanzaharov [21]

We are told that f(x) = x + 2. We want to find (f(x))^{2}.

Squaring f(x) on one side means we square x + 2 on the other.

So,

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We can use FOIL to square x + 2. The first terms multiply to x², the outside terms to 2x, the inside terms to 2x and the last terms to 4.

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3 years ago
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