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4 years ago

Positive numbers have negative square roots. A. True O B. False

Mathematics

2 answers:

qwelly [4]4 years ago

7 0

The Answer is A. True

DanielleElmas [232]4 years ago

3 0

Answer:

A. True

Step-by-step explanation:

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Two mechanics worked on a car. The first mechanic charged $85 per hour, and the second mechanic charged $80 per hour. The mechan

igor_vitrenko [27]

Answer: 13 and 12

Step-by-step explanation:

4 0

4 years ago

In a lottery game a player wins $1,000,000 with probability 0.0000005, wins $200,000 with probability0.000002, and wins $30,000

MariettaO [177]

Answer:

$X_1 = 1000000 , P(X_1)= 0.0000005$

$X_2 = 200000 , P(X_2)= 0.000002$

$X_3 = 30000 , P(X_3)= 0.00001$

$X_4 = -2, P(X_4) = 1-0.0000005-0.000002-0.00001= 0.9999875$

And then replacing we have this for the expected value:

$E(X) = 1000000*0.0000005 +200000*0.000002+30000*0.00001 2*0.9999875$

And after do the math we got:

$E(X) = -0.79998$

And then the expected value for this game is -0.79998 a negative result means NOT a win.

Step-by-step explanation:

For this case we can define the random variable X as the amount that we can win. We can find the expected value with the following formula:

$E(X) = \sum_{i=1}^n X_i P(X_i)$

And we have the following probabilities and possible values given:

$X_1 = 1000000 , P(X_1)= 0.0000005$

$X_2 = 200000 , P(X_2)= 0.000002$

$X_3 = 30000 , P(X_3)= 0.00001$

$X_4 = -2, P(X_4) = 1-0.0000005-0.000002-0.00001= 0.9999875$

And then replacing we have this for the expected value:

$E(X) = 1000000*0.0000005 +200000*0.000002+30000*0.00001 2*0.9999875$

And after do the math we got:

$E(X) = -0.79998$

And then the expected value for this game is -0.79998 a negative result means NOT a win.

7 0

3 years ago

Explain how to do this please show your work

madreJ [45]

Answer:

(x- 5)(x - 3)

x(x - 3) -5(x - 3)

x^2 - 3x - 5x + 15

x^2 - 8x + 15

4 0

3 years ago

Bobby hopes that he will someday be more than 70 inches tall. He is currnebtyb70 inches tall how many more inches does bobby nee

xeze [42]

Bobby needs to grow at least 1 in to be more than 70 inches tall

8 0

3 years ago

Solve the inequality b-4>3

vaieri [72.5K]

Answer:

b>7

Step-by-step explanation:

b-4>3
b>3+4
B>7

6 0

3 years ago