3 years ago

How do we solve a proportion?

Mathematics

1 answer:

nikitadnepr [17]3 years ago

5 0

Answer:

Step-by-step explanation:

a matter of stating the ratios as fractions, setting the two fractions equal to each other, cross-multiplying. Ex

(2)(9)

If I have to , I'll include my fractional equation with the arrows. answer is:

x = 6

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Can the pythagorean theorem can be used for any type of triangle

Natalka [10]

The theorem can be used for any triangle of which one of its sides must be a right angle.

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4 years ago

Use the definition of the derviative to compute the derivative of f(x)= 1- 7x^2 at the specific point x=2.

GaryK [48]

Answer:

$f'(x) = -28 \ at \ x = 2$

Step-by-step explanation:

$f'(2) = \lim_{h \to 0}\frac{f(2+h)) -f(2)}{h} \\\\f(2+h) = 1 - 7(2+h)^2 = 1 - 7(4 +h^2 +4h) = 1 - 28 - 7h^2 - 28h = - 7h^2 -28h - 27\\\\f(2) = 1 - 7(2^2) = 1 - 28 = -27\\\\f(2+h) - f(2) = -7h^2 - 28h - 27 - (-27) = -7h^2 -28h -27 + 27 = -7h^2 -28h\\\\f'(2) = \lim_{h \to 0}\frac{-7h^2 - 28h}{h} \\\\$