3 years ago

Can you use doubling for 7 times 3

2 answers:

8 0

Well yea doubling is like getting the same number like 7×3 with equals 21
So you have to find the same number 21, but in a different way like this

7
7 7
+7 ×3
------ -----
21 21

V125BC [204]3 years ago

4 0

What do you mean doubling? You can add 7+7+7 which equals 21.

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Hello!

Substitute 7 for x in the equation.

<h3>Evaluate</h3>

f(x) = -4x² + 10x + 13
f(7) = -4(7)² + 10(7) + 13
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