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3 years ago

Which two events are complements?

Mathematics

1 answer:

VARVARA [1.3K]3 years ago

7 0

Well, Complementary events are two outcomes of an event that are the only two possible outcomes.<span>
So, getting a head or a tail when tossing a coin is one of them because there are only 2 possible outcomes. Heads or tails. </span>

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A stack of cards is numbered 1 to 21. Leilani pulls one card from the stack. What is the best approximation for the probability

arlik [135]

Answer:

The approximation is 0.2( real value is 0.19)

Step-by-step explanation:

In this question, we are to calculate the best approximation if in a pack of cards labeled 1 to 21 , the card selected is a multiple of 5

First we know that the total number of options in our sample space is 21; from 1 to 21

now let’s get the multiples of 5. we have 5,10,15 and 20

The probability of selecting a multiple of 5 is thus; 4/21 . This can be approximately be said to be 0.2 ( actual value is 0.19)

7 0

3 years ago

I need to knowww nowwwww

mars1129 [50]

Answer:

Stephanie.

Step-by-step explanation:

6 0

4 years ago

Help please !!! At a local Brownsville play production, 420 tickets were sold. The ticket prices varied on the seating

Radda [10]

Answer:

n = 12$ x = 8$ y = 10$ where n, x, and y are number of tickets

12 n + 8 x + 10 y = 3920 and n + x + y = 420

12n + 8 (x + y) + 2 y = 3920

12 n + 8 (5 n) + 2 y = 3920 since 5 (x + y) = n

52 n + 2 y = 3920 or y = 1960 - 26 n

Also, n + x + y = 420 or n + 5 n = 420 since x + y = 5 n

n = 70 so 70 of the $12 were sold

And since y = 1960 - 26 n we have y = 140 tickets

Now 12 * 70 + 8 x + 140 * 10 = 3920

This gives x = 210 tickets

Check: 210 + 140 + 70 = 420 tickets

Also, 12 * 70 + 210 * 8 + 140 * 10 = 3920

7 0

3 years ago

A cafeteria starts with 750 fish sticks for lunch. Each meal they serve uses 6 of the fish sticks, At the end of the lunch there

BigorU [14]

Answer:

The value of N = 118

Step-by-step explanation:

750 = 6n + 42

move all the numbers that don't contain n to the right side

6n = 750 - 42

6n = 708

708 / 6 = 118

n = 118

plug the numbers back in

6 ( 118) = 708

708 = 708

plug the 42 back in

708 + 42 = 750

4 0

3 years ago

Plot and connect the points A(1,-5), B(-4,-3), C(3,-3), and find the area of the triangle it forms.

Dovator [93]

Answer:

7 square units

Step-by-step explanation:

Two of the points are on the horizontal line y = -3, so it is convenient to call that the "base" of the triangle. The length of the base is the difference in the x-coordinates of its end points:

b = 3 -(-4) = 7

The height is measured perpendicular to the base, so is the vertical distance from the line y=-3 to the third point. That distance is the difference between -3 and the y-coordinate of point A:

-3 -(-5) = 2

The triangle has a base of length 7 and a height of 2. Its area is ...

A = 1/2bh

A = 1/2(7)(2) = 7 . . . . square units

6 0

2 years ago