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3 years ago

Evaluate ab – 0.55 when a1 and b = 5.what's the answer?

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

3 0

Answer:

4.45

Step-by-step explanation:

a=1 and b=5 so 1x5=5 and 5-.55=4.45

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Step-by-step explanation:

(cos 10° − sin 10°) / (cos 10° + sin 10°)

Rewrite 10° as 45° − 35°.

(cos(45° − 35°) − sin(45° − 35°)) / (cos(45° − 35°) + sin(45° − 35°))

Use angle difference formulas.

(cos 45° cos 35° + sin 45° sin 35° − sin 45° cos 35° + cos 45° sin 35°) / (cos 45° cos 35° + sin 45° sin 35° + sin 45° cos 35° − cos 45° sin 35°)

sin 45° = cos 45°, so dividing:

(cos 35° + sin 35° − cos 35° + sin 35°) / (cos 35° + sin 35° + cos 35° − sin 35°)

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$(-8)\cdot(-\frac{9}{3})\cdot(-\frac{2}{5})$

To multiply these numbers, the first step is to writhe "-8" as an improper fraction, to do so, divide it by 1

$(-\frac{8}{1})\cdot(-\frac{9}{3})\cdot(-\frac{2}{5})$

Next is to solve the multiplication, to do so, first multiply the first two terms of the multiplication:

$(-\frac{8}{1})\cdot(-\frac{9}{3})$

The multiplication is between two negative numbers, when you multiply two negative numbers, the minus signs cancel each other and turn into a positive value, this is called "double-negative"

$(-\frac{8}{1})\cdot(-\frac{9}{3})=\frac{8\cdot9}{1\cdot3}=\frac{72}{3}$

Next multiply the result by the third fraction -2/5

This time you are multiplying a positive and a negative number, so the result of the calculation will be negative

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Final step is to simplify the result, both 144 and 15 are divisible by 3, so divide the numerator and denominator by 3 to simplify the result to the simplest form:

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1 year ago

Evaluate ab – 0.55 when a1 and b = 5.what's the answer?​

Evaluate ab – 0.55 when a1 and b = 5.what's the answer?