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Olegator [25]
3 years ago
11

Ashley purchased a prepaid phone card for $25. Long distance calls cost 14 cents a minute using this card. Ashley used her card

only once to make a long distance call. If the remaining on her card is $21.64, how many minutes did her call last
Mathematics
1 answer:
OverLord2011 [107]3 years ago
5 0
If we add $0.14 until we get $21.64, we would add it 154.572 times. To check this answer and make sure I’m right, do this equation: 0.14 x 154.572, then you would get 21.64.

The correct answer is 154.572 minutes.
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Which of the following is a radical equation?<br> Ox√3=13<br> O x+√3=13<br> O√x+3=13<br> O x+3=√13
vazorg [7]

Answer:

The answer is c because of how the equation is set and made

5 0
2 years ago
Example 2: Graph 2x-5y210
salantis [7]

Answer:

I am not sure this is graphable

Step-by-step explanation:

There needs to be an = sign

3 0
3 years ago
Determine which ordered pairs fall on the graph of f(x) = -2x-1
Pavlova-9 [17]

Answer:

No order Pair fall on the graph

Step-by-step explanation:

The given Function is

f(x)= -2x -1       ...............(i)

Now to see whether these ordered pairs Lay on it we will put each ordered pair in the equation (i)


Lets take first ordered pair (1,1)

here x = 1

putting it in (i) gives

f(1)= -2(1) -1

f(1)= -3

this is not equal to 1 so the order pair (1,1) does not fall on function f(x)= -2x -1

Lets take second ordered pair (-1,-4)

here x = -1

putting it in (i) gives

f(-1)= -2(-1) -1

f(-1)= 1

this is not equal to -4 so the order pair (-1,4) does not fall on function f(x)= -2x -1


Lets take third ordered pair (-2,-1/8)

here x = -2

putting it in (i) gives

f(-2)= -2(-2) -1

f(-2)= 3

this is not equal to -1/8 so the order pair (-2,1/8) does not fall on function f(x)= -2x -1


Lets take fourth ordered pair (0,-1/2)

here x = 0

putting it in (i) gives

f(0)= -2(0) -1

f(0)= -1

this is not equal to -1/2 so the order pair (0,-1/2) does not fall on function f(x)= -2x -1


3 0
4 years ago
Solve. {3d−e=7 d+e=5 Use the linear combination method. The solution is (2, −1). There are infinitely many solutions. The soluti
nydimaria [60]

Answer:

The solution of the given equations are (3,2).

Step-by-step explanation:

Given equations are :

3d−e=7 ...(1)

d+e=5 ...(2)

Add equations (1) and (2) we get :

3d-e+d+e=7+5

4d = 12

d = 3

Put the value of d in equation (2).

3+e=5

e = 2

So, the value of d = 3 and e = 2. Solution of the given equations are (3,2).

7 0
3 years ago
Check My Work According to the National Association of Realtors, it took an average of three weeks to sell a home in 2017. Data
Salsk061 [2.6K]

Complete question :

According to the National Association of Realtors, it took an average of three weeks to sell a home in 2017. Suppose data for the sale of 39 randomly selected homes sold in Greene County, Ohio, in 2017 showed a sample mean of 3.6 weeks with a sample standard deviation of 2 weeks. Conduct a hypothesis test to determine whether the number of weeks until a house sold in Greene County differed from the national average in 2017. Useα = 0.05for the level of significance, and state your conclusion

Answer:

H0 : μ = 3

H1 : μ ≠ 3

Test statistic = 1.897

Pvalue = 0.0653

fail to reject the Null ; Hence, we conclude that their is no significant to accept the claim that number I weeks taken to sell a house differs.

Step-by-step explanation:

Given :

Sample size, n = 40

Sample mean, x = 3.6

Population mean, μ = 3

Standard deviation, s = 2

The hypothesis :

H0 : μ = 3

H1 : μ ≠ 3

The test statistic :

(xbar - μ) ÷ (s/√n)

(3.6 - 3) / (2/√40)

0.6 / 0.3162277

Test statistic = 1.897

Using T test, we can obtain the Pvalue from the Test statistic value obtained :

df = n - 1; 40 - 1 = 39

Pvalue(1.897, 39) = 0.0653

Decison region :

If Pvalue ≤ α ; Reject the null, if otherwise fail to reject the Null.

α = 0.05

Pvalue > α ; We fail to reject the Null ; Hence, we conclude that their is no significant to accept the claim that number I weeks taken to sell a house differs.

7 0
3 years ago
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