Twenty students participated in a psychology experiment which measured their heart rates in two different situations.



Which situation shows greater variability?

Answer:

-(5x+8)(x - 3)

Step-by-step explanation:

add and subtract second term to expression and factor using grouping

Answer:

19/20

Step-by-step explanation:

Chow,...!

Answer:

Use the following identity:

Substitute:

and get:

We know

If a+b+c=0

[tex]\boxed{\sf a^3+b^3+c^3=3abc}[/tex]

[tex]\\ \sf\longmapsto 3x^3+5y^3+4z^3=3(3x)(5y)(4z)[/tex]

[tex]\\ \sf\longmapsto 27x^3+125y^3+64z^3=180xyz[/tex]

Hence proved

answer : 8.975

8 39/40 = 8.975

Answer:

x = 12 or x = -6

Step-by-step explanation:

Solve for x over the integers:

abs(x - 3) = 9

Split the equation into two possible cases:

x - 3 = 9 or x - 3 = -9

Add 3 to both sides:

x = 12 or x - 3 = -9

Add 3 to both sides:

Answer: x = 12 or x = -6

Answer:

-0.65, -0.35, 4, 5

Step-by-step explanation:

The bigger the number is in negatives the farther the way it is away from 0, therefore making -0.65 the least number.

Answer:

X=0

Step-by-step explanation:

4x=0

divide both sides by 4

x=0/4

x=0

Answer:

The equation is following the mathematical rule of multiplying exponents.

Step-by-step explanation:

As an example to back up the answer, when you have half of a dollar, that is $0.50, if you took a half (1/2) of $0.50 that would be one fourth (1/4) of a dollar, but half of 50 cents ($0.50) A similar thing is happening with this problem. When you have two numbers (2 and 4) when you multiply them together, they equal to eight (8) for this problem, when you multiply two exponents together, you are raising the coefficient (a real number like 6) to the power of 2, and then taking that number and multiplying it by the power of 4. This is similar to the half of 50 cents, is equal to 1/4 of dollar  ($0.25)

Hope this helps explain multiplying exponents together, and the mathematical rule behind it.

Answer:

[tex]42 = - 48 + 3r[/tex]

add 48 to either sides:

[tex]42 + 48 = ( - 48 + 3r) + 48 \\ 90 = 3r \\3r = 90[/tex]

divide all sides by 3:

[tex] \frac{3r}{3} = \frac{90}{3} \\ \\ { \boxed{ \boxed{r = 30}}}[/tex]

Answer:

r = 30

Step-by-step explanation:

42 = -48 + 3r

42 + 48 = -48 + 48 + 3r

90 = 3r

[tex]\frac{90}{3} =\frac{3r}{3}[/tex]

30 = r

Answer:

d. 6, 4 (1/2), 3, 1 (1/2), ...

Step-by-step explanation:

A geometric sequence is any sequence that is exponentially growing/decaying, so analyze the slopes. The slope for D is a constant -1.5, so it is a linear (not geometric) sequence.

hggghghghhghghghghhghghghghhghhgStep-by-step explanation:

Answer:

3 units

Step-by-step explanation:

Since the y- coordinates are both 6 , then this is a horizontal line and the distance between the 2 points is the difference in the x- coordinates , that is

distance = | - 2 - 1 | = | - 3 | = 3

or

distance = | 1 - (- 2) | = | 1 + 2 | = | 3 | = 3

Here slope m is 0

[tex]\\ \sf\longmapsto y=mx+b[/tex]

[tex]\\ \sf\longmapsto y=0x+(-2)[/tex]

[tex]\\ \sf\longmapsto y=-2[/tex]

Answer:

Step-by-step explanation:

If we know that D is the midpoint, then 2x + 7 = 4(x-3). Doing the algebra on that gives us

2x + 7 = 4x - 12 and

19 = 2x so

x = 9.5

Answer:

-(5/14)

Step-by-step explanation:

Make the denominators the same.

-9/14 (Stays)

2/7(Times by 2 to make denominator 14)

-9/14 + 4/14 = -5/14

Final asnwer is -(5/14)

Answer:

-5/14

Step-by-step explanation:

first make them the same denominator

we can multiply the 2/7 by 2/2 to get 4/14 so it becomes really easy to add :)

-9/14 + 4/14 = -5/14!

it's already in simplest form so there's nothing else you have to do :D

Answer:

D

Step-by-step explanation:

the repeatition is the same between the relationship

hope this helps

Answer:

The answer is a.

Step-by-step explanation:

All linear equations have a straight line on the graph.

Answer:

Choice A

The ratio of the rise to the run of the given triangle is [tex]\frac{1}{4}[/tex]

The ratio of the rise to the run of the image triangle is [tex]\frac{1}{4}[/tex]

Answer: No, it will not coincide with itself.

This is because the angle of rotation is 360/n = 360/5 = 72 degrees instead of 100 degrees. This applies to regular pentagons where the sides are the same length and the angles are the same measure.

Answer:

Down 8 floors : - 8

Up 5 floors : 5

Step-by-step explanation:

Down is negatives, up is positive

Answer:

- 8

+ 5

Step-by-step explanation:

hope that helps

have a good day

Answer:

99

Step-by-step explanation:

The time that the ball is at its maximum height approximate will be 3.5 seconds, the time that the ball hits the ground will be 5 seconds, approximately, and the time is the ball 67 feet above the ground will be 2 and 4 seconds.

A statement, principle, or policy that creates the link between two variables is known as a function. Functions are found all across mathematics and are required for the creation of complex relationships.

A baseball is hit upward from a height of 3 feet with an initial velocity of 80 feet per second (about 55 mph). The graph shows the height of the ball at any given second during its flight.

From the graph, the time that the ball is at its maximum height approximate will be 3.5 seconds.

The time that the ball hits the ground will be 5 seconds, approximately.

The time is the ball 67 feet above the ground will be 2 and 4 seconds.

The complete question is attached below.

More about the function link is given below.

https://brainly.com/question/5245372

#SPJ2

Answer:

3(x+6)

Step-by-step explanation:

Parenthesis after a number typically means multiply, so 3 times the sum of an unspecified number (x), plus 6 would be 3 (x+6)

Answer:

-4+4/2,-4-1/2

0/2,-5/2

0,-5/2

Answer:

8x - 11

Step-by-step explanation:

?

just do the multiplications and add things up.

1 + 4(2x - 3) = 1 + 8x -12 = 8x - 11

Answer:

6^11

Step-by-step explanation:

you have 6 and 6 so it stays 6 and then you add the exponents on this problem which gives u 11

Answer:

6^11

Step-by-step explanation:

In this case the base remains the same but you add exponents. Try it on your calculator

6^5 x 6^6 = 362797056

6^11 = same as above

Answer:2500 cubic meters (m^3)

Step-by-step explanation:

To find the volume of a rectangular prism (like a pool), use the formula

V = l * w * h

V = 50 * 25 * 2

V = 2500

Answer:

A(-5,9)

Step-by-step explanation:

M(-1,2)

B(3,-5)

Slope = (y2-y1)/(x2-x1)

(-5-2)/(3-(-1))

-7/4

m to B is down 7, right 4

m to A = up 7, left 4

Answer:

-6+6=0

Step-by-step explanation:

mark me as brainlist

Answer:

Step-by-step explanation:

First, plot the graph of each function.

Then look for intersection of the two graphs.

Last, take the coordinates of intersection points, these are the solution.

See the attached.

Answer:

3x+3+2x-8 = 180

5x-5 =180

x= 37

Step-by-step explanation:

mark me as brainliest ❤️

Step-by-step explanation:

[tex]\sf \ angles \ \ (3x+3) \ and \ \ (2x-8) \ adjacent \\\\ As \ \ we \ \ know \ \ the \ \ sum \ of \ adjacent \ \ angles \ is \ 180^{\circ} \\\\ then : \\\\ 3x+3+2x-8 =180 \\\\ 5x-5=180 \\\\ 5x=185 \\\\ \boldsymbol {\sf x=37 ^{\circ }}[/tex]

Answer:

The Quadratic Formula uses the "a", "b", and "c" from "ax2 + bx + c", where "a", "b", and "c" are just numbers; they are the "numerical coefficients" of the quadratic equation they've given you to solve.

Step-by-step explanation: