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Anna11 [10]
3 years ago
12

WILL GIVE BRAINLYST DUE IN 20 MINS

Mathematics
1 answer:
Darina [25.2K]3 years ago
5 0

Answer:

1. x = -7

2. y = -1

Step-by-step explanation:

1.

-3x - 5 = 16              add 5 to both sides

-3x = 21                    divide -3 to both sides

x = -7

2.

-4(y-2) = 12             distribute -4

-4y + 8 = 12             subtract 8 from both sides

-4y = 4                divide -4 to both sides

y = -1

SECOND PAGE

1. x = 9

2. y = -3

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1/3x + 4 = 10 what is x
nydimaria [60]

Answer:

X = -13/10

Step-by-step explanation:

5 0
3 years ago
How many ways are there to select a 5-card hand from a regular deck such that the hand contains at least one card from each suit
Snezhnost [94]

Answer:

There are 685464 ways of selecting the 5-card hand

Step-by-step explanation:

Since the hand has 5 cards and there should be at least 1 card for each suit, then there should be 3 suits that appear once in the hand, and one suit that apperas twice.

In order to create a possible hand, first we select the suit that will appear twice. There are 4 possibilities for this. For that suit, we select the 2 cards that appear with the respective suit. Since there are 13 cards for each suit, then we have {13 \choose 2} = 78 possibilities. Then we pick one card of all remaining 3 suits. We have 13 ways to pick a card in each case.

This gives us a total of 4*78*13³ = 685464 possibilities to select the hand.

6 0
3 years ago
An increase in walking has been shown to contribute to a healthier life-style. A sedentary American takes an average of 5000 ste
Zielflug [23.3K]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

H0: µ = 5000

For the alternative hypothesis,

H1: µ > 5000

Since the population standard deviation is given, z score would be determined from the normal distribution table. The formula is

z = (x - µ)/(σ/√n)

Where

x = sample mean

µ = population mean

σ = population standard deviation

n = number of samples

From the information given,

µ = 5000

x = 5430

σ = 600

n = 40

z = (5430 - 5000)/(600/√40) = 4.53

Looking at the normal distribution table, the probability corresponding to the z score is < 0.0001

Since alpha, 0.05 > than the p value, then we would reject the null hypothesis. Therefore, at a 5% level of significance, it can be concluded that they walked more than the mean number of 5000 steps per day.

6 0
3 years ago
The parents organization bought 1,000 bumper stickers at $1.25 each to sell at football games.They want to make at least $750 pr
yuradex [85]
1000 x 1.25 = 1250  
1000 x 2 = 2000
2000 - 1250 = 750 
2000 divided by 1000 = 2

They should sell the bumper stickers for $2 each.
Hope this helped =)
5 0
3 years ago
two pages that are back to back in a text have 201as the sum of their page numbers what are the page numbers.​
REY [17]

Answer:

Pages 100 and 101

Step-by-step explanation:

Round 201 to 200 (to make it easier).

Divide 200 by 2, because it is 2 pages.

You are left with 100.

100 is one of the pages, but because you rounded down 1 number, the other number must be 101, because the pages are back to back.

I hope this made sense, this is just how I figured it out. :)

6 0
3 years ago
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