MATHEMATICS HIGH SCHOOL

If x2 = 10, what is the value of x?±square root of 10
±square root of 20
±5
±20

Answers

Answer 1
Answer:

Answer:

x = ±√10

Step-by-step explanation:

Don't you mean x^2 = 10 or x² = 10?  

Taking the square root of both sides, we get:

x = ±√10 (matches first answer)

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A five minute drive would be how long of a walk?​

Answers

Time to complete the distance ( walk time ) ≈ 10 minutes

Hi your question is incomplete but I will provide the general principles on how to resolve this kind of problems

The variables to be considered are :

  • Velocity/speed
  • distance/displacement
  • Time

To determine how long a five minute drive would take a walk to complete

first step : determine the distance

speed = distance / time

assume distance = x

speed = x/5

second step : assume speed of car

lets assume the speed of the car = 20 m/minutes

20 = x / 5

therefore x ( distance ) = 20 * 5 = 100 meters

assume walking speed = 10 m/minutes

y ( time to complete distance ) = distance / speed =  100 / 10 =  10 minutes

Hence based on my assumptions walk time = 10 minutes

learn more : brainly.com/question/23936119

Answer:

11 minutes walking

Step-by-step explanation:

F(x)=2-3xEvaluate f(0)
A. -3
B. 5
C. 2
D. - 1


Which ordered pair is the turning point of the graph of f(x)= |x-4|?

A. (4,0)
B. (-4,0)
C. (0,4)
D. (0, -4)

Answers

the answer would be C.

A real estate agent is working for a developer who claims that the average commute time to downtown is 20 minutes with a standard deviation of 7 minutes. Stephon is an independent real estate agent and wants to check the times for his client. He took a random sample of 15 commute times and found an average of 26 minutes. He did hypothesis testing using a significance level of 5%. Which conclusion could he make?

Answers

To calculate the z-statistic, we must first calculate the standard error.

Standard error is standard deviation divided by the square root of the population. In this case, it is equal to 1.81.

The z-score is defined the distance from the sample to the population mean in units of standard error.

z = (26 – 20)/1.81 = 3.31

at this z-score = 0.0005 which is less than 5%

 

the answer is C. the z- statistic is 3.32, so the null hypothesis should be rejected.

Which tables contain correct pairs of input and output values for the function ? Select all the correct answers.

Answers

The correct answer for the question that is being presented above is this one: "A rule is a function if each element in the domain goes to exactly one element in the range."

The following tables that contain correct pairs of input and output values for the function are the: 
(1) 
Input (x) -1.6 0.4 2.2 3.7
Output f(x) -5.5 2.5 6.75 10.75

(2)
Input (x) 1.1 2.4 5.3 6.9
Output f(x) 4.25 7.5 11.75 17.25

Answer:

domain (0,1,3,5,6) range (-20,-16,-8,0,4) function f(x)=4-4x

domain (-2,-1,0,3,4) range -13,-8,-3,12,17) function f(x)=5x-3

domain (-4,-3,0,2,4) range (-40,-20,0,20,40) function f(x)=10x

domain (-3,-2,-1,2,6) range (0.5,0,-1.5,3,2) function f(x)=3/x+1.5

Step-by-step explanation:

Solving systems of elimination 1) x-y=11
2x+y=19

2) 4x+8y=20
-4x+2y=-30

4) -6x+5y=1
6x+4y=-10
what are the answer to these three questions

Answers

To answer by systems of elimination, you add equations together to eliminate variables if they have the same amount of negative variables in one as the positive variables in another.
For example, in number one.

x - y = 11
2x + y = 19

Both equations contain a variable expressed in the same numbers of negative and positive in each of them, one positive y and negative y. This lets us add the equations together.
x + 2x = 3x
 11 + 19 = 30
3x = 30
x = 10

Now that we know that x = 10, we can plug it into the first equation, x - y = 11 to find y.

x - y = 11
10 - y = 11
y = -1 

For the second one,

4x + 8y = 20
-4x + 2y = 30

Negate the x's since there is the same and opposite amount, while adding the rest of the equations together.

8y + 2y = 10y
20 + 30 = 50
10y = 50
y = 5

Plug it into the initial equation to find x

4x + 8(5) = 20
4x + 40 = 20

Subtract 40 from both sides

4x = -20
x = -5

For the third equation,

-6x + 5y = 1
6x +4y = -10

Negate the x's, add the rest together

5y + 4y = 9y
1 - 10 = -9
9y = -9
y = -1

Plug it into the first equation to find x

-6x + 5y = 1
-6x + 5(-1) = 1
-6x - 5 = 1

Add five to both sides

-6x = 6
Divide both sides by negative 6
x = -1

When the problems do not have the same value of opposite versions of current numbers, for example:

3x + 4y = 6
-6x +g = 6

You can multiply an entire equation to get similar numbers of a variable.
For example, you can multiply the first equation entirely by 2 to get the same number of positive x's to the negative x's in the second one, changing it to 6x x 8y = 12.

Hope I helped.

Juanita is 13 years older than her cousin. The sum of their ages is no less than 103 years.Enter an inequality that can be used to represent this situation in the first box, where x represents Juanita's cousin's age.

Enter the youngest age Juanita's cousin can be in the second box.

Answers

"No less than" means "greater than or equal to"
Juanita's cousin's age = x
Juanita's age = 13x
Sum greater than or equal to 103 years
13x + x ≥ 103
14x ≥ 103
Juanita's cousin is at least:
x ≥ 103/14
x ≥ 7.35
Juanita's cousin is at least 8 years old
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