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Ad libitum [116K]
3 years ago
11

John was working on a polynomial subtraction problem, and his work is shown. (3x^2+4x-8)-(x^2-5x+4)

Mathematics
1 answer:
Tanya [424]3 years ago
5 0

Answer:

idk but can u mark me brainleeeast?<em> PLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS㏒㏑</em>

Step-by-step explanation:

You might be interested in
what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed
kramer

Answer:

P(x \le 21) = 0.69146

Step-by-step explanation:

The missing parameters are:

n = 64 --- population

\mu = 20 --- population mean

\sigma = 16 -- population standard deviation

Required

P(x \le 21)

First, calculate the sample standard deviation

\sigma_x = \frac{\sigma}{\sqrt n}

\sigma_x = \frac{16}{\sqrt {64}}

\sigma_x = \frac{16}{8}

\sigma_x = 2

Next, calculate the sample mean \bar_x

\bar x = \mu

So:

\bar x = 20

So, we have:

\sigma_x = 2

\bar x = 20

x = 21

Calculate the z score

x = \frac{x - \mu}{\sigma}

x = \frac{21 - 20}{2}

x = \frac{1}{2}

x = 0.50

So, we have:

P(x \le 21) = P(z \le 0.50)

From the z table

P(z \le 0.50) = 0.69146

So:

P(x \le 21) = 0.69146

4 0
3 years ago
THE NUMBER 1-10 ARE IN A BAG, YOU TAKE 2 OUT WITHOUT REPLACEMENT. WHAT IS THE PROBABILITY OF DRAWING THE NUMBER 7 THE FIRST TIME
ehidna [41]

Answer:

1 / 18

Step-by-step explanation:

PROBABILITY OF DRAWING THE NUMBER 7 THE FIRST TIME = Number of favorable outcome / Total number of outcomes

Favorable outcome = 1

Total number of outcome (1,2,3,4,5,6,7,8,9,10) = 10

PROBABILITY OF DRAWING THE NUMBER 7 THE FIRST TIME  = 1 / 10

PROBABILITY OF DRAWING AN EVEN NUMBER THE SECOND TIME = Number of favorable outcome / Total number of outcomes

Favorable outcome (2,4,6,8,10) = 5

Total number of outcomes (1,2,3,4,5,6,8,9,10) = 9

PROBABILITY OF DRAWING AN EVEN NUMBER THE SECOND TIME = 5/9

PROBABILITY OF DRAWING THE NUMBER 7 THE FIRST TIME AND THEN DRAWING AN EVEN NUMBER = 1 / 10  * 5 / 9 = 1 / 18

6 0
3 years ago
A campground consists of 5 square campsites arranged in a line along a beach. The distance from the edge of a campsite to the wa
Anestetic [448]
To answer this question with the choices given, you would substitute the possible answers into your work for the base and the height of each dimension on the entire campground.

To find the length of the campground, you multiply each choice by 5 because there are 5 campsites.

For the width, you add each choice to 4.

Then you multiply the total length by the total width to see if your answer is 950 square yards.

See the attached picture for all the work.

7 0
3 years ago
Can you help plzzz ​
Romashka-Z-Leto [24]

Answer:

1.1  ithink

Step-by-step explanation:

6 0
3 years ago
Multiply and simplify: –3x2y2 • x4<br> –3x5y2<br><br> 9x5y2<br><br> –3x6y2<br><br> –3x5y6
Contact [7]

Answer:

Multiplying and simplifying the term -3x^2y^2 \:.\: x^4 we get \mathbf{-3x^6y^2}

Option C is correct option.

Step-by-step explanation:

We need to multiply and simplify: -3x^2y^2 \:.\: x^4

Simplifying the term:

-3x^2y^2 \:.\: x^4

While multiplying, the variables with same bases are multiplied: a^m\:.\:a^n=a^{m+n}

In the given question only x^2 and x^4 are variables with same bases, So we get:

=-3(x^{2+4})y^2\\=-3x^6y^2

So, multiplying and simplifying the term -3x^2y^2 \:.\: x^4 we get \mathbf{-3x^6y^2}

Option C is correct option.

4 0
3 years ago
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