Prove sin^2(pi÷8+a)-sin^2(pi÷8-a)=√2÷2sin 2a help me, thanks

PLEASE HELP ITS DUE TODAY!!!Mr.Sanchez's Class sold fruit pues for $1.65 and Mr.Kellys class sold bottles of fruit juice for $1.

4vir4ik [10]

Answer:

3

Step-by-step explanation:

because the fortnite shotgun does 7 damage

8 0

3 years ago

Mark is going to an awards dinner and wants to dress appropriately. He is running behind schedule and asks his little brother to

Cerrena [4.2K]

Answer:

The answer is " $\bold{\frac{2}{3}}$ ".

Step-by-step explanation:

Pick a shirt first: 3 choices

Pick slacks next: 2 choices

Then choose a tie: 1 choice

Total: $3 \times 2 \times 1 = 6$ outfits.

These will be similarly divided between the two slacks, so 3 black slack outfits of $6 = \frac{1}{2}$ . Similarly, the 6 styles are also divided between the option of 3 shirts. 2 blue shirt outfits $6 = \frac{1}{3}$

To recognize that over outfits are a mix of a blue shirt and black slack, it would be twice many more to add $\frac{1}{2} \ and \ \frac{1}{3}$ . Add $\frac{1}{2} \ and \ \frac{1}{3}$ , and remove the chance for both the black slack shirt and outfit and are one of the six outfits:

$\to \frac{1}{2} + \frac{1}{3} -\frac{1}{6} =\frac{3+2-1}{6} =\frac{4}{6} = \frac{2}{3}$

8 0

3 years ago

Read 2 more answers

First photo question-The graph below shows three different normal distributions.

zheka24 [161]

Answer:

For the first question: They must each have a different mean and a different standard deviation. For the second question: In an observational study the researchers do not control treatment and in an experiment they do. For the third question: The second graph. For the fourth question: The second graph.

Step-by-step explanation:

For the first question: We can see that each bell-shaped curve is centered around a different number. This tells us that their means are all different.

We can also see that each curve has a different width; this means that the spread of data, measured in part by the standard deviation, is different as well. This means both the mean and the standard deviation of each distribution is different.

For the second question: In an observational study, as the name implies, all that is done is observation. There is no treatment given by the researchers. In an experiment, however, one group receives treatment and one group does not, so the differences can be measured.

For the third question: In the first graph, the probabilities add up to 1.2. This is more than 100%, so this is not a valid distribution. In the second graph, the probabilities add up to 1.0; this is 100% exactly, so this is a valid distribution.

For the fourth question: In the first graph, the probabilities only add up to 0.9. This is not 100%, so this is not a valid distribution. In the second graph, the probabilities add up to 1.0; this is 100% exactly, so this is a valid distribution.

8 0

3 years ago

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A punch recipe that serves 24 people calls for 4 liters of lemon-lime soda, 2 pints of sherbet, and 6 cups of ice. How much of e

andrew-mc [135]

For twelve people you need: 2 litres of lemon-lime soda, 1 pint of sherbet and 3 cups of ice tea.
For 36 people you need: 6 litres of lemon-lime soda, 3 pints of sherbet and 9 cups of ice.

5 0

3 years ago

Write the following phrase as a variable expression. Use x to represent "a number" the sum of a number and seventeen

SashulF [63]

Answer:

$x+17$

Step-by-step explanation:

Hi there!

Let $x$ represent "the number".

The sum of a number and seventeen

⇒ $x+17$

I hope this helps!

3 0

3 years ago

Prove sin^2(pi÷8+a)-sin^2(pi÷8-a)=√2÷2sin 2a help me, thanks​

Prove sin^2(pi÷8+a)-sin^2(pi÷8-a)=√2÷2sin 2a help me, thanks