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dmitriy555 [2]
3 years ago
12

Determine whether the given point lies on the graph of the inequality.

Mathematics
1 answer:
blondinia [14]3 years ago
4 0
<span>-x - 6y < 19. 

Point ( -1, -3)   </span>⇔    x = -1   ,  y = -3
<span>instead of the variables you need to put the values ​​of x and y ( coordinates of the point )</span>
- (-1) - 6*(-3) < 19

<span>we calculate

1 + 18 < 19    </span><span>record turns mushy

Proposal
</span>the point does not belong to the graph<span>


</span>
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Olivia ate two times as many nachos as Reagan. If Reagan ate r nachos, which equation can be used to find the number of nachos O
Rzqust [24]

Step-by-step explanation:

Olivia's nachos is v.

Raegan's nachos is r.

v = 2r

5 0
3 years ago
Read 2 more answers
Sam and Mary collect marbles. “If you give me 5 marbles I’ll have twice as many as you.” said Sam to Mary.
ivann1987 [24]

Answer:

54 marbles

Step-by-step explanation:

The question is a word problem leading to a simultaneous equation

Let 'x' represent the initial number of marbles with Sam, and let 'y' represent the initial number of marbles with Mary,

If Mary gives Sam 5 marbles, we have;

x + 5 = 2 × (y - 5)...(1)

If Sam gives Mary 4 marbles, we get;

x - 4 = y + 4...(2)

From equation (1), we get;

x + 5 = 2 × (y - 5) = 2·y - 10

x = 2·y - 10 - 5 = 2·y - 15

x = 2·y - 15...(3)

From equation (2), we have;

x - 4 = y + 4

∴ x = y + 4 + 4 = y + 8

x = y + 8...(4)

Equating the two values of 'x' in equation (3), and equation (4), we get;

2·y - 15 = y + 8

2·y - y = 8 + 15 = 23

∴ y = 23

From equation (4), we get;

x = y + 8 = 23 + 8 = 31

x = 31

The total number of marbles they have altogether = x + y

However, x + y = 23 + 31 = 54

Therefore;

The total number of marbles they have altogether = 54 marbles.

7 0
3 years ago
27. A manufacturer claims its Brand A battery lasts longer than its competitor's Brand B battery. Nine batteries of
mamaluj [8]

According to the desired test, the test that should be conducted is:

  • (B) A one-sided, two-sample t-test

<h3>Test:</h3>
  • At the null hypothesis, it is tested if Brand A batteries do not last longer than Brand B batteries, that is, the result of the subtraction is of at most 0:

H_0: \mu_A - \mu_B \leq 0

  • At the alternative hypothesis, it is tested if it is greater, that is:

H_1: \mu_A - \mu_B > 0

The factors determining the test used are as follows:

  • We can find the <u>standard deviation for the sample</u>, hence a t-test is used.
  • There are two samples, the lifetimes for batteries A and for batteries B, hence, a two-sample test is used.
  • We are testing if one mean is greater than another, and more than/less than tests are one-sided.
  • Hence, option B is correct.

You can learn more about test hypothesis at brainly.com/question/13873630

4 0
2 years ago
5. Is the sequence arithmetic? If so, identify the common difference.
HACTEHA [7]
5.
aritmetic is same increase per term
14 to 21 is 7
21 to 42 is 21
7≠21
no


6.
decreases by 4 each time
an=a1+d(n-1)
an=10-4(n-1)
n=12 for 12th term
a12=10-4(12-1)
a12=10-4(11)
a12=10-44
a12=-34

it is -34



7.
missing term is y
22+n=y
y+n=34
22+n+n=34
22+2n=34
minus 22 from both sides
2n=12
divide both sides by 2
n=6
22+n=y
22+6=y
28=y

28 is answer



5. no
6. -34
7. 28
6 0
3 years ago
Read 2 more answers
0.579 x 10 by the power of 4 <br>correct answer gets brainliest
MrRa [10]
Regular notation is 5790. scientific notation is 5.79 x 10^3
5 0
3 years ago
Read 2 more answers
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