The freshmen competed with the sophomores to see who could raise the most money by recycling. The appropriate design for testing the significance of the difference between the means is

Answer:

its b

Step-by-step explanation:

Time interval 6:53 a.m to 8:53 a.m, the average rate of change per hour the greatest.

Given,  

Time          Temperature (°F)  

5:53 a.m.       60.1

6:53 a.m.       60.1

8:53 a.m.       66.9

11:53 a.m        75.2

3:53 p.m.        78.1

From 5:53 a.m. to 6:53 a.m. the temperature is constant. So average rate of change per hour is 0.

From 6:53 a.m to 8:53 a.m. the temperature is increasing from 60.1 to 66.9 or 6.8 in 2 hours . So average rate of change per hour is [tex]\frac{6.8}{2} =3.4[/tex].

From 8:53 a.m. to 11:53 a.m the temperature is again increasing from 66.9 to 75.2 or 8.3 in 3 hours. So average rate of change per hour is [tex]\frac{8.3}{3} =2.76[/tex].

From 11:53 a.m to 3:53 p.m. the temperature is again increasing from 75.2 to 78.1 or 2.9 in 4 hours. So average rate of change per hour is [tex]\frac{2.9}{4}=0.725[/tex].

Now clearly from the above points time interval 6:53 a.m to 8:53 a.m, the average rate of change per hour the greatest.

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Answer:

Brainliest are always appreciated :)

Step-by-step explanation:

For Number 1, just make a graph. (THE LINE WILL BE STRAIGHT)

For Number 2:

Proportional is when quantities have the same relative size. In other words they have the same ratio. The cocoa has an equivalent ratio which is why its proportional. This means that as x increases, y increases and as x decreases, y decreases-and that the ratio between them always stays the same.

Answer:

7 divided 2 is another way of saying 7/2 since division and fractions are alike.

Step-by-step explanation:

Answer:

because youre still dividing it either way;

Step-by-step explanation:

an improper fraction (7/2) you would have to see how many times the 2 goes into the 7 to get a proper fraction. its the same way with division, just less complicated and in a different format.

Answer:

A. Sandra substitutes c = 925 into the equation c + (c + 750) = 2,600.

C. Sandra finds a true statement after substituting 925 into the equation.

F. When Sandra evaluates the equation with c = 925, she adds 925 to 750. Then, she adds that sum to 925. She finds that the value is 2,600.

Step-by-step explanation:

select the first one, then the 3rd one, then the 6th one <3

Answer:

A: The line is a dotted line and the shaded part is on the right side of the line

B: Yes it is correct because if u put in the x value and the y value and calculate it the statement is true.

Answer:

7*6543=45801

Step-by-step explanation:

We have the digits 34567 and must arrange them into a product with the largest possible value.

It's clear that we must place the largest digits to the left, so they represent larger numbers to multiply.

Let's try with:

7654*3=22962

765*43=32895

76*543=41268

7*6543=45801

This last combination definitely produces the largest product

Answer: 7*6543=45801

Answer:

the turning point is (-2,-1)

i dont know the turning point but i hope this helps

Step-by-step explanation:

Answer:

a) (-2 , -1)

b) (-1 , 0) and (-3 , 0)

Step-by-step explanation:

For part a)

We can find the coordinates of the turning point by seeing at the graph where it turns the other way or in simpler words the axis of symmetry so if see the graph the axis of symmetry is the line x = -2 so that means the turning point is (-2 , -1).

For finding the turning point mathematically we compare the equation to its standard form which is:

[tex]x^2+4x+3=a(x-h)^2+k[/tex]

where h is the x coordinate  and k is the y coordinate of the turning point of the equation (h , k) = (x , y).

so just solve the left side,

[tex]a(x-h)^2+k\\a((x)^2-2(x)(h)+(h)^2)+k\\a(x^2-2xh+h^2)+k\\\\ax^2-2ahx+ah^2+k=x^2+4x+3\\[/tex]

and so we compare the coefficients of x^2 on the right and left side we get

[tex]a=1[/tex]

if we compare the coefficients of x on the right and left side we get

[tex]-2ah=4\\-2(1)h=4\\-2h=4\\h=\frac{4}{-2}\\\\h=-2[/tex]

now we compare the constants on the right and left side we get

[tex]ah^2+k=3\\(1)(-2)^2+k=3\\(1)(4)+k=3\\4+k=3\\k=3-4\\k=-1[/tex]

so the turning point is (-2 , -1) proven mathematically and graphically as well

For part b)

Roots of the equation are also called as x-intercepts which means where the graph intersects/cuts the x-axis so if see the graph it cuts the x-axis at 2 points  firstly at -3 and then at -1 so the roots of the equation would be (-1 , 0) and

(-3 , 0) the y coordinate is zero when the points lies on the x-axis.

for mathematically solving the equation we would equate the equation to zero

[tex]y=x^2+4x+3\\x^2+4x+3=0[/tex]

Now solve it by either factorizing or by using the quadratic formula we would get two values for x those are the roots of the equation

we solve it by factoring

[tex]x^2+4x+3=0\\x^2+3x+x+3=0\\x(x+3)+1(x+3)=0\\(x+3)(x+1)=0\\x=-3\ ,\ x=-1\\[/tex]

proven mathematically as well as graphically.

Answer:

10 = y

Step-by-step explanation:

5 and 4 was in the first triangle, in the other triangle its 14 and y 14 is 10 times bigger than 4 so y is 10

Answer:

-12

Step-by-step explanation:

× x 2 = 2x

2x/3= -8x3/2

x = -12

Answer:

Yes.

Step-by-step explanation:

6(64) = 6(50+14)

Using the Distributive Property, 6 needs to be multiplied by both 50 and 14.

6(50+14) = 6(50) + 6(14)

Thus, Jane is correct.

Answer:

21

Step-by-step explanation:

Answer:

Ziad is 30 years old.

Marc is 10 years old.

Step-by-step explanation:

We will use m to represent Marc's age this year, and z to represent Ziad's age this year.

This year:

z = 3m

To show their relative ages in ten years time:

z + 10 = 2(m+10)

We can rearrange this to make m the subject.

z + 10 = 2m + 20

z = 2m + 10

We also know that m = 3z. We can substitute this value into our equation.

3m = 2m + 10

m = 10

Use z = 3m to find that z = 30.

The answer is C. 6 blocks.

Answer:

C. 6 blocks is correct. I took the test and got that right :)

Step-by-step explanation:

Answer: 8

Step-by-step explanation:

A Geometric sequence can be used:

To Model this sequence you need to use this formula

A (subscript n) = Ar(n-1)

a = value of the first term

n = the # of the term you want to find (For example, if you want to find the term number 3, it is 12)  

r = the common ratio, this is obtained by dividing the second term in the sequence by the first.

So the value of r is = 2/3 because 27 times 2/3 = 18 which is the second term

n = 4 since you want to find the 4th term in the sequence

Plug it in and results are

4th term = 27(2/3)^(4-1)  = 8

Sample Response:

There is a common ratio of 2/3 between the height of the ball at each bounce. So, the bounce heights form a geometric sequence: 27, 18, 12. Two-thirds of 12 is 8, so on the fourth bounce, the ball will reach a height of 8 feet.

Answer:

Kindly check explanation

Step-by-step explanation:

Let :

Original commute time = x

Commute time due to road construction = 150% of original commute time

Hence, commute time due to road construction :

(150 / 100) * x

0.15x

Hence, the implication of the road construction in progress means that it will now take additional half of the usual time it takes them on a Monday morning.

For instance, an individual whose usu commute time is 10 minutes in the morning will now take :

1.5x = 1.5(10) = 15 minutes commute time on a Monday morning.

Answer:

let the larger and  smaller number be x and y respectively

first condition

x + y = 49

second condition

3x = 2y+97

3x-2y =97

Multiplying first condition by two and adding both equations

2x + 2y = 98

3x -2y = 97

5x =  195

x = 195/5 = 39

putting the value of x in

x + y = 49

y = 49 -39 = 10

again

Step-by-step explanation:

Answer:  (x+2)^2/x+2

= x+2 * x+2 / x+2

= x+2

Hope it helped u,

pls mark as the brainliest

^_^

Answer:

1.

Bazı vitaminler yağda çözünür; diğerleri suda çözünür. Suda çözünen vitaminler (C, tiamin, riboflavin, piridoksin, biotin, pantotenik asit, folat, B12) bir veya daha fazla polar veya iyonize edilebilir gruba sahip olma eğilimindeyken, yağda çözünen vitaminler (A, D, E ve K) ağırlıklı olarak aromatik ve alifatik karakterlere sahiptir.

2.

Besinler, yaşam ve sağlık için gerekli olan gıdalardaki bileşiklerdir ve bize enerji, onarım ve büyüme için yapı taşları ve kimyasal süreçleri düzenlemek için gerekli maddeler sağlar. Altı ana besin maddesi vardır: Karbonhidratlar (CHO), Lipitler (yağlar), Proteinler, Vitaminler, Mineraller, Su.

3.

Vitaminlerin farklı görevleri vardır - enfeksiyonlara direnmenize, sinirlerinizi sağlıklı tutmanıza ve vücudunuzun gıdalardan veya kanınızdan düzgün pıhtılaşmak için enerji almasına yardımcı olur. Beslenme Yönergelerini takip ederek, bu vitaminlerin çoğunu yiyeceklerden yeterince alacaksınız. Mineraller ayrıca vücudunuzun çalışmasına yardımcı olur.

Step-by-step explanation:

This is the best i could do...

Answer: s = 16

2(s - 10) = 12

distribute the 2

2s - 20 = 12

add 20 to both sides

2s = 32

divide both sides by 2

s = 16

you can then check your work by putting in the 16

2 (16-10) = 12

2 (6) = 12

12 = 12

Answer:

Gracias generous mane •‿•

Step-by-step explanation:

Answer:yes

Step-by-step explanation:

The equation representing the situation is c = 3.5b

An equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.

Given that, Harold can buy 2 pounds of bananas for $7.

Since, he can buy 2 pounds in $7 so, 1 pound in = 7/2 = $3.5

So, when he will buy b pounds of bananas he will spend = $3.5b

So, if c is the total cost for b pounds of bananas, then the equation representing the total cost for b pounds of bananas will be,

c = 3.5b

Hence, c = 3.5b is the equation that represent the cost, c, for b bananas.

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Answer:

a. $9.72

b. $11.60

Step-by-step explanation:

$9.39*(1+(3.5/100)) = $9.72

$9.39*(20/100) = $1.88

$9.72+$1.88 = $11.60

Answer:

Greater than 4.

Step-by-step explanation:

the answer is 6, and 6 > 4.

Have a good day! God bless! :D

Answer

(264/4)x66=4356 using a square

Step-by-step explanation:

each side will have 66 feet on fenecing adding up to 264 feet. A square is the most effiecnt shape to enclose and area.

Step-by-step explanation:

y = -2x² + 9x - 11 (2 complex solutions)

y = 3x² - 6x + 3 (1 distinct real solution)

y = -x² - 4x + 7 (2 real solutions)

Answer:

w times t

Step-by-step explanation:

Answer:

1.25t+5

Step-by-step explanation:

period

x/4 - 5 = -8

=> x/4 = -8 + 5

=> x/4 = -3

=> x = -3 × 4

=> x = -12

So, answer is B. –12

Answer:

Step-by-step explanation:

y = 4 * x

you can replace y and x with any values, but it has to be correct. you can say 15 = 4 * 3, but that isn't correct. but you can say 16 = 4 *4

The value of the equation is y = 4x

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

Substituting the values in the equation , we get

y = 4x   be equation (1)

On simplifying the equation , we get

when x = 1

y = 4 ( 1 )

y = 4

when x = 2

y = 4 ( 2 )

y = 8

when x = 3

y = 4 ( 3 )

y = 12

when x = 4

y = 4 ( 4 )

y = 16

Therefore , the values of y are { 4 , 8 , 12 , 16 }

Hence , the equation is y = 4x

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Answer:

7.24 * 10^-5

Step-by-step explanation: