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3 years ago

Toss a coin 5 times. what is the probability of getting exactly 2 tails

1 answer:

5 0

The total number of outcomes is (1/2)^5 dice each of the 5 coin tosses is an independent event. From the 5 possible tails, exactly 2 tails need to be selected. So the favored outcome is 5C2 = (5*4)/(1*2)= 10. The probability is 10/32 = 5/16.

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If x -1/7,evaluate x²+1/x²

SCORPION-xisa [38]

Answer:

$given \: x = - \frac{1}{7}$

$x {}^{2} + \frac{1}{x {}^{2} }$

$( - \frac{1}{7} ) {}^{2} + \frac{1}{ ( - \frac{1}{7} ) {}^{2} }$

$\frac{1}{49} + \frac{1}{ \frac{1}{49} }$

$\frac{1}{49} + \frac{1 \times 49}{1}$

$\frac{1}{49} + 49$

$\frac{2402}{49} \: or \: 49.02$

6 0

3 years ago

Exit Ticket

miskamm [114]

Throughout this, I'm assuming that the scale is: 1 square = 1

Not 100% sure if my answers are correct.

Question 1:

The x coordinate must be 2 and the y coordinate must be -1.

Question 2:

The x coordinate would be -2 and the y coordinate would be -1.

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2 years ago

A box contains 4 red cubes, 3 blue cubes, 2 green cubes, and 1 yellow cube. You pick two cubes at random, replacing each after y

Lynna [10]

Answer:

Step-by-step explanation:

There are 10 cubes all together.

You want blue and then red with replacement.

Blue

P(B then red) = 3/10 * 4/10 = 12 / 100

12/100 reduces to 3/25

The answer is A

4 0

2 years ago

Read 2 more answers

Graph a right triangle with the two points 4,5 and -4,8

Katyanochek1 [597]

Answer:

Step-by-step explanation:

Please write points using parentheses: (4, 5) and (-4, 8}.

(4, 5) is in the 1st quadrant and (-4, 8} is in the 2nd. Reversing the order of these two points yields (-4, 8) and (4, 5). From this we can see that while moving from (-4, 8) to (4, 5) involves following a line with negative slope (because the y-coordinate decreases from 8 to 5 as the x-coordinate increases from -4 to +4). This sloping line is the hypotenuse of a right triangle. Draw a vertical line segment through (-4, 8) and a horizontal line segment through (4, 5). This hypotenuse, the vertical line segment and the horizontal line segment are the boundaries of the desired right triangle.

6 0

3 years ago

On average Asia makes 14 out of 20 free throws Assuming the relationship is proportional, how many free throws is she likely to

dybincka [34]

Answer:

105

Step-by-step explanation:

14:20=7:10

150/10=15

7x15=105

3 0

3 years ago