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marta [7]
3 years ago
5

An experiment was conducted by some students to explore the nature of the relationship between a person's heart rate (measured i

n beats per minute) and the frequency at which that person stepped up and down on steps of various heights. Three rates of stepping and two different step heights were used. A subject performed the activity (stepping at one of the three stepping rates at one of the two possible heights) for three minutes. Heart rate was then measured at the end of this period. The variables "stepping rate" and "step height" are the
A. factors.
B. levels.
C. controls.
D. units.
E. response variables.
Mathematics
1 answer:
tekilochka [14]3 years ago
6 0

Answer:

A. factors.

Step-by-step explanation:

The correct option is - A. factors.

Reason -

The variables "stepping rate" and "step height" are the factors because a activity is performed in which stepping at one of the three stepping rates at one of the two possible heights for three minutes.

The activity is based on both the variables stepping rate and step height.

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Solve for x if sqrt (3x-8) + 1 = sqrt (x+5)
In-s [12.5K]

The solution of x in the given expression \mathbf{\sqrt{(3x-8)}+1 = \sqrt{(x+5)}} is 4. However, if it is \mathbf{\sqrt{(3x-8)+1} = \sqrt{(x+5)}}, it is 6.

<h3>What is the solution to algebraic expression?</h3>

The solution to the given algebra expression involving surds can be seen in the steps below.

Given that:

\mathbf{\sqrt{(3x-8)}+1 = \sqrt{(x+5)}}

Remove the square roots, we have:

12x - 32 = 4x² - 48x + 144

Solving the quadratic equation at the RHS and equating it to LHS, we have:

x = 11, x = 4

Verifying the solutions by replacing the value of x with the given equation:

  • x = 11 False
  • x = 4 True

Therefore, we can conclude that the value of x = 4

NOTE:

Given that:

\mathbf{\sqrt{(3x-8+1)} = \sqrt{(x+5)}}

Square both sides

3x - 7 = x +5

Solve for x

3x - x = 5 + 7

2x = 12

x = 6

Learn more about solving to algebraic expressions here:

brainly.com/question/4344214

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5 0
2 years ago
3. Evaluate and graph<br> the solution.<br> 3. E<br> the<br> "the<br> 5x + 9-3x s 21<br> +<br> ++
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Answer:

x=6

Step-by-step explanation:

5x+9-3x=21

5x-3x=21-9

2x=12

x=6

5 0
3 years ago
What is the application of inverse matrix?
Mila [183]

Answer:

The inverse matrix is used to solve the system of linear equations. It also tells us the consistent or inconsistent behaviour of the solution of equations.

Step-by-step explanation:

In real life,

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3 years ago
Figure ABCD is translated down by 6 units:
MaRussiya [10]

Translation does not affect angles or side lengths. Sides that are parallel before translation remain parallel after translation.

The only parallel sides in this figure are AD and BC, so the only reasonable choice is ...

... A'D' ║ B'C'

3 0
3 years ago
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Leto [7]

Answer:

i dont think this is wright but i got 48

Step-by-step explanation:

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