3 years ago

Without using paper and pencil, how would you find the sum of 23 and 37?

Mathematics

2 answers:

ankoles [38]3 years ago

8 0

You could use a calculator, or do mental math.

exis [7]3 years ago

4 0

You could also use your fingers, but that would take a while.

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Writing to explain what are compatible numbers? What compatible numbers would you pick to estimate the diferrent of 777-248? Why

Sphinxa [80]

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3 years ago

If f(x) = f(x)g(x), where f and g have derivatives of all orders, show that f'' = f ''g + 2f 'g' + fg''.

Nadya [2.5K]

Differentiating once, we have

$f'(x)=f'(x)g(x)+f(x)g'(x)$

Differentiating again,

$f''(x)=f''(x)g(x)+f'(x)g'(x)+f'(x)g'(x)+f(x)g''(x)$
$f''(x)=f''(x)g(x)+2f'(x)g'(x)+f(x)g''(x)$

as needed.

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3 years ago

Can someone help??????????

olga nikolaevna [1]

The answer is b because are congruent

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3 years ago

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