MATHEMATICS COLLEGE

Who got the answer to this ?
(4x^2+6+7)-(-8x^2-2x+6)

Answers

Answer 1
Answer:

Answer:

12x^2+2x+7

Step-by-step explanation:

Distribute the Negative Sign:

=4x^2+6+7+−1(−8x^2−2x+6)

=4x^2+6+7+−1(−8x^2)+−1(−2x)+(−1)(6)

=4x^2+6+7+8x^2+2x+−6

Combine Like Terms:

=4x^2+6+7+8x^2+2x+−6

=(4x^2+8x^2)+(2x)+(6+7+−6)

=12x^2+2x+7

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How did you get the answer

Answers

Answer:

when you solve a questions

Step-by-step explanation:

You get the answer when you solve a questions correctly

please mark brainlest i had never got brainlest

Answer:

by getting the information for  a text ot story

Step-by-step explanation:

The table shows the height of water in feet at different times. The water rises and falls in a cyclical pattern.A 2-column table with 5 rows. Column 1 is labeled x with entries 12 a m, 3 a m, 6 a m, 9 a m, 12 p m. Column 2 is labeled y with entries 6, 10, 6, 2, 6.

Which equation models the data in the table?

y = 6 sine (StartFraction pi Over 6 EndFraction x) + 2
y = 6 sine (StartFraction pi Over 6 EndFraction x) + 4
y = 4 sine (StartFraction pi Over 6 EndFraction x) + 6
y = 4 sine (StartFraction pi Over 6 EndFraction x) + 10

Answers

Modeling the data in the table is done via the equation y = 4 sine (pi/6x) + 6.

What is a cyclic pattern?

Over a period of years, a cyclical pattern recurs with considerable regularity. Cyclical patterns are distinct from seasonal patterns in that they last across a number of years as opposed to only one year for seasonal trends.

Given, The table shows the height of water in feet at different times. The water rises and falls in a cyclical pattern.

Table:

12 AM                      6  

3 AM                        10

6 AM                        6  

9 AM                        2  

12 PM                       6  

from the general formula of wave

y = A sin(bx + c)

Substituting values in the equation from the graph attached below:

6 = A sin(0*b + c)......(1)

10 = A sin3b + c...(2)

6 = A sin6b + c......(3)

2 = A sin9b +c........(4)

Since -c/b is a phase shift of the graph

Thus

-c/b = 6

c = -6b

from equations 2 and 1

2* 6 = Asin(-3b) = -Asin3b

2 * 6 = Asin(-6b) = -Asin6b

2* 6/6 =sin6b/sin3b

1 = Cos3b

Thus b = π/6

from substitution in equations 3

6 = A sin6b + c

=> 6 = Asin 6* pi/6  + c

=> c = 6

\begin{table}[]\begin{tabular}{ll}12 AM & 6 \n3 AM & 10 \n6 AM & 6 \n9 AM & 2 \n12 PM & 6 \end{tabular}\end{table}from substitution in equations 2

10 = A sin3b + c

A = 4

therefore, The equation that models data in the table is y = 4 sine (pi/6x) + 6.

Learn more about cyclic patterns here:

brainly.com/question/15223077

#SPJ3

Answer:

c

Step-by-step explanation:

If the garden is to be 1250 square feet, and the fence along the driveway costs $6 per foot while on the other three sides it costs only $2 per foot, find the dimensions that will minimize the cost.

Answers

So, the minimum cost is $400.

Area of the rectangle:

The area of a rectangle is the region occupied by a rectangle within its four sides or boundaries.

And the formula is,

A=l* b

Given that,

Area of the garden=1250 square feet.

Let, the length be x and the breadth be y then,

xy=1250...(1)

The total cost of the fence is,

C(x,y)=6x+2x+4y\nC(x,y)=8x+4y\nC(x)=8x+4((1250)/(x) )\n

Now, differentiating the obtained equation we get,

C'(x)=8-(4* 1250)/(x^2) =0\nx^2=625\nx=25\ny=50

Therefore the length is 25 ft

And breadth is 50ft

Now, calculating the minimum cost,

8(25)+4(50)=50\n=400

Learn more about the area of the rectangle:

brainly.com/question/1037253

Answer:

Dimensions of rectangular garden:

x = 25 feet   ( sides along the driveway)

y = 50 feet

Step-by-step explanation:

Rectangular area is:

A(r)  = x*y           (1)

if we call x one the driveway side the cost of that side will be

6*x

The cost of the other side parallel to driveway side is 2*x and cost of the others two sides are 4*y

Total costs:  C = 6*x + 2*x  * 4*y     (2)

From equation (1)

A(r)  = 1250 = x*y      ⇒⇒   y = 1250/ x

Plugging that value in equation (2) we get costs as a function of x

that is:

C(x) = 6*x + 2*x +  4* 1250/x

Taking derivatives on both sides of the equation

C´(x)  = 6 + 2 - 5000/x²

C´(x)  = 8 - 5000 /x²

C´(x) = 0       ⇒       8 - 5000 /x² = 0

8*x² -5000 = 0

x² = 5000/8

x² = 625

x = 25 feet

and    y = 1250/ 25

y = 50 ft

C(min) = 50*2*2 + 6*25 + 2*25

C(min) = 200 + 200

C(min) = 400 $

Under the 14 =126Under the 16=144
Under the 6=72
Under the 21=252

Who makes more per hour?

Answers

Answer: julie

Step-by-step explanation: loren makes $9 an hour and julie makes $12 an hour.

Let yequals[Start 3 By 1 Matrix 1st Row 1st Column 3 2nd Row 1st Column negative 7 3rd Row 1st Column 3 EndMatrix ]​, Bold u 1equals[Start 3 By 1 Matrix 1st Row 1st Column negative 3 2nd Row 1st Column negative 5 3rd Row 1st Column 1 EndMatrix ]​, Bold u 2equals[Start 3 By 1 Matrix 1st Row 1st Column negative 3 2nd Row 1st Column 3 3rd Row 1st Column 6 EndMatrix ]. Find the distance from y to the plane in set of real numbers R cubed spanned by Bold u 1 and Bold u 2.

Answers

Answer:

Answer to Let Bold Upper A equals Start 3 By 3 Matrix 1st Row 1st Column 1 2nd ... 1st Column 4 2nd Column 7 3rd Column 0 3rd Row 1st Column negative 4 ...

Step-by-step explanation:

Carpetland salespersons average $8000 per week in sales. Steve Contois, the firm's vice president, proposes a compensation plan with new selling incentives. Steve hopes that the results of a trial selling period will enable him to conclude that the compensation plan increases the average sales per salesperson. a. Develop the appropriate null and alternative hypotheses.

Answers

Answer:

Null hypothesis: The average sales per salesperson of Carpetland is $8000 per week

Alternate hypothesis: The average sali per salesperson of Carpetland is greater than $8000 per week

Step-by-step explanation:

The null hypothesis is a statement deduced from a population parameter which is subject to testing

The alternate hypothesis is a statement that negates the alternate hypothesis which is accepted if the null hypothesis is tested to be false
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