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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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Which of the following sets of coordinates represents a triangle that is congruent to the one graphed below?
Lesechka [4]

Answer:

its c because it is I know

3 0
4 years ago
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What is the point-slope form of an equation passing through (0, -5) with a 5 points
Novay_Z [31]

Answer:

y=2x-5

Step-by-step explanation:

y-y_{1}=m(x-x_{1})

x_{1}=0, y_{1}=-5\\, and m=2

y-(-5)=2(x-0), -(-5)-Two negatives make it positive, and you distribute the 2

y+5=2x, you now subtract 5 to get y by itself to get your answer of

y=2x-5

*NOTE* (0,-5) is the y-intercept, so you could have used the linear equation of y=mx+b, m=2, and b(y-intercept)=-5

giving you y=2x-5

6 0
3 years ago
What is the range of the function y= /x+5 ?<br> y2-5<br> y20<br> y2 15<br> O<br> O y25
maksim [4K]
I think the answer isY2-5
7 0
3 years ago
What is the discriminant of the quadratic equation 0 = –x2 + 4x – 2?
Elis [28]
The formula to find the discriminant equals D = b^2-4ac. 
(Quadratic equations have the formula ax^2+bx+c. A = -1, B = +4, C = -2.)

D = 4^2-4(-1)(-2). 8-8 = 0. 

0 = 1 solution
-D = 0 solutions
+D = 2 solutions


The discriminant equals 0, also establishing that if you were asked to find the solutions, there would only be one.



6 0
4 years ago
Simplify and express your answer in both polar and standard form.
tino4ka555 [31]

Simplifying and expressing each term in standard and polar form are respectively; 49/2 and  -512 - 512i√3

<h3>How to express an equation in polar form?</h3>

1) We are given the expression;

[7 cos (45)]²

We know that cos (45) in standard form is 1/√2. Thus;

[7 cos (45)]² = (7 * 1/√2)² = 49/2

2) We are given the expression;

(-2 + 2i√3)⁵

Using binomial theorem, we have;

(−2)⁵ + 5(−2)⁴ (2i√3) + 10(−2)³(2i√3)² + 10(−2)²(2i√3)³ + 5 * −2(2i√3)⁴ + (2i√3)⁵

Simplifying each term gives;

−32 + 160i√3 + 960 − 960i√3 −1440 + 288i√3

⇒ -512 - 512i√3

Read more about Polar form at; brainly.com/question/27844433

#SPJ1

8 0
2 years ago
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