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3 years ago

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Which pair of trigonometric functions has the same value? A. sin ( 54 ° ) , sin ( 36 ° ) sin 54 ° , sin 36 ° B. cos ( 32 ° ) , s

in ( 58 ° ) cos 32 ° , sin 58 ° C. sin ( 43 ° ) , cos ( 137 ° ) sin 43 ° , cos 137 ° D. cos ( 25 ° ) , cos ( 155 ° )

1 answer:

Zanzabum3 years ago

4 0

Answer:

holy.... you'll break my brains

Step-by-step explanation:

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4 years ago

Emily practices piano for 2/3 of an hour on Monday and 1/2 hour on Wednesdays. How many hours does Emily spend practicing piano

Sergeu [11.5K]

Answer:

50 minutes

Step-by-step explanation:

Given:

$\bullet \ \ \text{Monday:} \ \dfrac{2}{3} \times \text{Hour}\\\\\bullet \ \text{Wednesday:} \ \dfrac{1}{2} \times \text{Hour}$

Since Emily only practiced on Monday and Wednesday, the sum of time on both days is the time Emily practiced on the piano for a week.

$\implies \text{Monday + Wednesday = Total time practiced on piano for a week}$

<u>Substitute the times in the equation</u>

$\implies (\dfrac{2}{3} \times \text{Hour}) + (\dfrac{1}{2} \times \text{Hour}) = \text{Total time practiced on piano for a week}$

<u>Simplify the equation</u>

$\implies (\dfrac{2}{3} \times 60 \ \text{minutes}) + (\dfrac{1}{2} \times 60 \ \text{minutes}) = \text{Total time practiced on piano for a week}$

$\implies (20 \ \text{minutes}) + (30 \ \text{minutes}) = \text{Total time practiced on piano for a week}$

$\implies \boxed{50 \ \text{minutes} = \text{Total time practiced on piano for a week}}$

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2 years ago

What is the probability of rolling an odd number _or_ a 4 in **two rolls** of a (fair) six-sided die? may require outside refere

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On a cube there are 6 sides. There are three odd numbers and one 4, so the probability of rolling these numbers is 4/6 which is 2/3. To get the probability of it from two rolls, we multiply it by itself once because it is being rolled once more. 2/3 x 2/3 is 4/9, so the probability of rolling an odd number or four in two roles is 4/9.

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3 years ago

Read 2 more answers

Solve the equation for y.

gayaneshka [121]

Answer: C

Step-by-step explanation:

$2x+5y=5$

$\mathrm{Subtract\:}2x\mathrm{\:from\:both\:sides}$

$2x+5y-2x=5-2x$

$\mathrm{Simplify}$

$5y=5-2x$

$\mathrm{Divide\:both\:sides\:by\:}5$

$\frac{5y}{5}=\frac{5}{5}-\frac{2x}{5}$

$\mathrm{Simplify}$

$\bf{y=-\frac{2}{5}x + 1}$

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2 years ago