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3 years ago

GIVING BRAINLIEST PLS HELP (x + 3)^2 – 3 = 0 lesser x = greater x=

Mathematics

2 answers:

agasfer [191]3 years ago

7 0

Answer:

(x+3)^2 -3 =0 then

$\sqrt{(x + 3 ){}^{2} } = - or + \sqrt{3} \\ x + 3 = - or + \sqrt{3} \\ x = - or + \sqrt{3} - 3$

lesser of x is

$- \sqrt{3} - 3and \\ greate \: of \: x = \sqrt{3} - 3$

malfutka [58]3 years ago

4 0

^ I got same thing as above

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Which of the following trigonometric ratios are correct?

den301095 [7]

Hi there! In this problem, you should have the knowledge of three basic Trigonometric Ratio.

sinA = opposite/hypotenuse
cosA = adjacent/hypotenuse
tanA = opposite/adjacent

Now that we know three basic ratio. Let's check each choices!

sin50° = d/c

This choice is wrong because we focus on the 50° angle. When we focus on 50°, sin50° should be d/x and not d/c.

sin50° = c/x

This choice is also wrong because in ratio, it's cos50° that adjacent/hypotenuse.

tan50° = d/c

This choice is correct! As ratio states, tanA = opposite/adjacent.

tan50° = x/c

This choice is wrong. x/c is a reciprocal of cosine which is 1/cos. We call the reciprocal of cosine as secant or sec in short.

cos50° = x/d

This choice is wrong as x/d is a reciprocal of sine which is 1/sin. We call the reciprocal of sine as cosecant or cosec/csc in short.

cos50° = c/x

This choice is right by the ratio. Nothing really much to explain since we follow by ratio that is defined.

Answer

tan50° = d/c
cos50° = c/x

Questions can be asked through comment.

Furthermore, tan also has its reciprocal form itself which is called cotangent also known as cot in short.

Hope this helps, and Happy Learning! :)

8 0

3 years ago

In a lottery game, a player picks six numbers from 1 to 21. If the player matches all six numbers, they win 40,000 dollars. Othe

Darina [25.2K]

Answer:

The expected value of this game is -$0.26.

Step-by-step explanation:

Expected value:

Each possible earning/loss multiplied by it's probability.

Probability:

Number of desired outcomes divided by the number of total outcomes.

In this question, the order in which the numbers are chosen is not important. So we use the combinations formula to solve.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

Probability of winning:

Desired outcomes:

The 6 correct numbers, so $D = 6$

Total outcomes:

6 numbers from a set of 21. So

$T = C_{21,6} = \frac{21!}{6!15!} = 54264$

Probability:

$p = \frac{1}{54265}$

Expected value

$\frac{1}{54265}$ probability of earning 40,000.

$\frac{54264}{54265}$ probability of losing 1. So

$E = \frac{40,000}{54265} - \frac{54264}{54265} = -0.26$

The expected value of this game is -$0.26.

7 0

3 years ago

Show all steps necessary to verify the trigonometric identity:

vekshin1

Answer:

1+tan2x

Tan2x

= <u> sec²x </u> = <u>Sec²x </u> = cosec²x

Tan²x ( Sec²x/cosec²x)

Step-by-step explanation:

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3 years ago

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Natali [406]

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4 years ago

What is -3m-8v-4m+5v

vladimir1956 [14]

I hope this helps you

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4 years ago

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