3 years ago

Julie is 3 years older than her sister. Julie's age is 11 years old. How old is her sister?

Mathematics

1 answer:

Ne4ueva [31]3 years ago

4 0

Answer:

14 :)

Step-by-step explanation:

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The value pie/2 is a solution for the equation 2sin^2x-sinx-1=0 true or false

Rasek [7]

Answer:

Yes, $\frac{\pi }{2}$ is a solution

Step-by-step explanation:

Recall that $sin(\frac{\pi }{2})=1$ . By replacing $\frac{\pi }{2}$ in the given trigonometric equation, we get 0 (zero) as a result, so this value is a solution:

$2*(sin(\frac{\pi }{2} ))^2-sin(\frac{\pi }{2})-1= 2*(1)^2-1-1=2-2=0$

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3 years ago

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Gnoma [55]

Answer:

1 and 2/21

Step-by-step explanation:

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Keith_Richards [23]

Answer:

Correct answer: (a - 4) · (a + 6)

Step-by-step explanation:

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3 years ago

Add 2 to 5, then multiply 3 by the result

Nostrana [21]

Answer:

Step-by-step explanation:

Step 1: add 2 to 5

=> 2 + 5

=> 7

Step 2: Multiply the result by 3:

=> 7 * 3

=> 21

Therefore the final answer = 21

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kiruha [24]

Answer:

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