Mathematics High School

In 2011, the price of gold reached an all-time high. The table shows the prices (in dollars per troy ounce) of gold each year since 2006 (t=0 represents 2006). Find a quadratic function that best models the data.

Answers

Answer 1

Answer:

y = 28.1739x² + 45.6478x + 617.4879 ;

$3891.36

Step-by-step explanation:

Given the data above :

We can employ an online quadratic model calculator to create a quadratic model of the data:

Year(t) ____0 ____1 ____2 ____3 ____4 ____5 (P)-603.46_695.39_871.96_972.35_1224.53_1571.52

The quadratic function obtained is :

y = 28.1739x² + 45.6478x + 617.4879

Using the model ; the price of gold in 2016 will be :

X = 2016 = 10 years (2016 - 2006)

y = 28.1739(10)^2 + 45.6478(10) + 617.4879 = 3891.3559

Hence, the predicted price of gold in 2016 using the model will be $3891.36

Related Questions

in the science club there are 2 sixth graders for every 3 seventh graders.

Answers

Answer:

Okay...

Step-by-step explanation:

Just divide as a fraction for if you finish the question.

Well what’s the question

A ribbon 9 feet long is cut into two pieces. One piece is 1 foot longer than the other.
What are the lengths of the two pieces?

Answers

5 feet and the other side is 4 feet!!

what is 7x+3+2x=13 i need help plz help me its for my home work

Answers

Answer:

7x+3+2x=13

9x=10

x=10/9

The book store manager keeps a chart of the number of books sold each week. How

many books were sold all together in weeks 2 and 4?

Book Store Sales

Week

Number of Books

1

2

3

4

1.412

1,531

2,050

1,785

Answers

Answer:

3315

Step-by-step explanation:

Given the data:

WEEK ________1 _____2______3______4

no of books __1412___1531 ___2050 ___1785

Number of books sold in weeks 2 and week 4

Books sold in week 2 = 1531

Books sold on week 4 = 1785

(1531 + 1784) = 3315

After sweeping the Baltimore Orioles at home in 2001, the Seattle Mariners had a record of 103 wins out of 143 games played. Find the Mariners’ winning rate. Write your answer as a decimal rounded to the nearest thousandth.

Answers

The answer is 0.720.

HELP!!!!!!!!!!!!!!!!!!!!! I WILL LOVE YOU FOREVER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

The area of the shaded region is (blank)
yd2.

**Use 3.14 as the approximation for pi**

Answers

Answer:

79.74

Step-by-step explanation:

Multiply 6 by 12 and that by 2:

(6 × 12) × 2 - (6 × 6) = 72 × 2 - 36= 144 - 36 = 108

That will be the equation for the shaded area besides the circle now lets calculate the circle and take it away from the equation. the circle's diameter is 6 so the radius should be 3, then use:

3 × 3 × 3.14 = 9 × 3.14 = 28.26

Then do this:

108 - 28.26 = 79.74

There you have it!

What does 3 mean in the function f(x)=2(3)^x

Answers

Answer:

The (3) is to multiply 2 x 2 x 2 to get your answer.

Step-by-step explanation:

Monique wants to enlarge a 4" x 6" photo to frame and hang up. If the enlarged photo must have a width of 3 feet, what is the height of the enlargement? (Be mindful of 4 x 6 is in the format l x w) (Also change to inches first and then convert back to feet)

Answers

Answer:

you eould have to start with 4 times 6 welll use algabra

Step-by-step explanation:

My teacher asked me to round 71,500 to the nearest thousand. I think that the answer is 72,000. Did I round correctly?

Answers

Answer:

yeah, that's right!!!!

1. Two eighth grade classes are selling tickets to raise money for their school fundraiser.
• One class is selling tickets for $3.50 each and has already raised $250.
• The other class is selling tickets for $2.25 each and has already raised $300.
How many tickets does each class have to sell so that the total amount raised is the
same for both classes?

Answers

Answer:

once upon a time i was looking for this answer and i couldnt find it here so for future generations i will help yall and the answer is 40 ITS 40

Step-by-step explanation:

peace

write the equation x+y=6y into standard form

Answers

Answer:

x - 5y = 0

Step-by-step explanation:

The equation of a line in standard form is

Ax + By = C ( A is a positive integer and B, C are integers )

Given

x + y = 6y ( subtract 6y from both sides )

x - 5y = 0 ← in standard form

Answer: x-5y=0

Step-by-step explanation:

x+y=6y

6y-y

X=5y

X-5y=0

Wes is 4 years older than his sister. Let x be his sister's age. Write an expression that tells how old Wes is.

Answers

x+4

if x is Wes' sister's age, then it would be x + 4 since Wes is 4 years older.

Someone please help me

Answers

To hit the bulls eye the table would read
x=3.5 y=2

5(2x-3-4z) Use the distributive property to rewrite the expression above

Answers

Answer:

= 10x-15-20z

Step-by-step explanation:

5 x 2=10 add the x to the end

5 x 3=15

5 x 4= 20 add the z to the end

Hope this helps (:

Answer= 10x-15-20z

Step by Step Explanation:

5(2x-3-4z) or 5•(2x-3-4z) which means the whole equation inside of the parentheses times 5; answer=10x-15-20z.

Will give brainlest please help! ASAP!

Answers

2pie

and

square root 3

Enter the values of h and k so that y = x2 + 6x + 10 is in vertex form.

y = (x +
)2 +

Answers

Answer:

y = (x + 3)^2 + 1

Step-by-step explanation:

100% on edge

Have a nice day :]

The equation in vertex form is [tex]y = (x + 3)^2 + 1[/tex], and the values of h & k are -3 and 1

What is the vertex form?

The vertex form of an equation is a quadratic equation, written in the form of a parabola

The equation is given as:

[tex]y = x^2 + 6x + 10[/tex]

Write out the constant

[tex]y = (x^2 + 6x) + 10[/tex]

Take the coefficient of x

[tex]k = 6[/tex]

Divide by 2

[tex]k/2 = 3[/tex]

Square the expression

[tex](k/2)^2 = 9[/tex]

So, we have:

[tex]y = (x^2 + 6x + 9 - 9) + 10[/tex]

Rewrite as:

[tex]y = (x^2 + 6x + 9) -9+ 10[/tex]

[tex]y = (x^2 + 6x + 9) + 1[/tex]

Express as a perfect square

[tex]y = (x + 3)^2 + 1[/tex]

Hence, the equation in vertex form is [tex]y = (x + 3)^2 + 1[/tex], and the values of h & k are -3 and 1

Answers

Answer

11 inches

Step-by-step explanation:

No explanation.

Of the 1200 responded to a survey, 456 claimed to be worried about money. What is the likelihood that a person selected at random will not be worried about money?

Answers

There is a 62% chance that the person will not be worried about money.

On a number line, the coordinates of X, Y, Z. and Ware-7. -5.2, and 4, respectively. Find the lengths of the two segments below. Then tell whether they are congruent.

XY and ZW

The length of XY is (Type an integer or a decimal.)

The length of ZW is (Type an integer or a decimal)

Answers

Answer:

[tex]XY = 2[/tex]

[tex]ZW = 2[/tex]

XY and ZW are congruent

Step-by-step explanation:

Given

[tex]X = -7[/tex]

[tex]Y = -5[/tex]

[tex]Z = 2[/tex]

[tex]W = 4[/tex]

Distance XY is calculated as thus:

[tex]XY = |X - Y|[/tex]

[tex]XY = |-7 - (-5)|[/tex]

[tex]XY = |-7 + 5|[/tex]

[tex]XY = |-2|[/tex]

[tex]XY = 2[/tex]

Distance ZW is calculated as thus:

[tex]ZW = |Z - W|[/tex]

[tex]ZW = |2 - 4|[/tex]

[tex]ZW = |-2|[/tex]

[tex]ZW = 2[/tex]

[tex]XY = ZW = 2[/tex]

Hence:

XY and ZW are congruent

If and represent rational expressions and b0 and y0, what is true of their product? Select three options.

The product is equivalent to .
The product is a rational expression.
The product is equivalent to .
The product is the ratio of ax and by.
The product is equivalent to .

Answers

The product with be rational expression

Answer:

B,C,D

Step-by-step explanation:

i took the test

A line passes through the point (-9,1) and has a slope of -2/3

Answers

Answer:

y - 1 = (-2/3)(x + 9)

Step-by-step explanation:

Here you are given a point on a line and the slope of the line. You'll need to apply the "point-slope" formula

y - k = m(x - h) (Memorize this)

Then m = slope = -2/3, h = -9 and k = 1.

Making the appropriate substitutions, we get:

y - 1 = (-2/3)(x + 9)

PLEASE HELP I NEED THIS RLY QUICK ILY

Answers

Answer:

it is B

Step-by-step explanation:

what is the solution to this equation?

A. x=-4
B. x= 100
C. x= 4
D. x=-100

Answers

Answer:

D. x = - 100

Step-by-step explanation:

[tex]\bold{\dfrac x5=-20}\\{}\ \ ^{\cdot5\qquad\cdot5}\\\bold{\dfrac x5\cdot\dfrac51=-20\cdot5}\\\\\bold{x=-100}[/tex]

WILL MARK YOU BRAINLIEST!!!!!!

Answers

Answer:

y = 88

Step-by-step explanation:

Don't worry about the other stuff, just worry about what's in the triangle that has Y.

53°, 39°, and y°

the sum should be equal to 180 so add 53 adn 39 and subtract it from 180.

180 - (53 + 39) = y

180 - 92 = y

88 = y

Hope this helped! Pls Brainliest my answer! It would help amd mean a lot! ;)

A city has a population of 38,802,500. Estimate this number as the product of a single digit and a power of 10.

Answers

7 because 10 to the power of 7 is 10,000,000

Factor and solve the quadratic equation

x^2 + 2x + 2 = 0

Answers

Answer:

no solution

Step-by-step explanation:

A binder at the store costs $4.87. A pack of pens at the same store costs $2.94. You pay for both the binder and pack of pens with a $20 bill
How much change do you receive?

Answers

Answer:

How much change you receive is $12.19

Step-by-step explanation:

$20 - $4.87 (price of a binder) - $2.94 (price of pack of pens) = ?

$4.87 + $2.94 = $7.81

$20 - $7.81 = $12.19

Kaelyn has 14 coins I have a value of $1.20. She only has dimes and nickels. How many nickels does Kaelyn have?

Answers

Answer:

10 dimes would be $1.00 and 4 nickels is $.20. That equals $1.20 and 14 coins.

Kaelyn has 4 nickels

Please order the following from least to greatest! ASAP
0.71, 3/4, 78%, 0.775, 7/9

Answers

Answer:

0.71, 3/4, 0.775, 7/9, 78%

Do these 3 side lengths form a right triangle? (Yes or no question): 39 ft, 32.5 ft, 48.5 ft

Answers

Answer: the answer is no

Step-by-step explanation:

no, it is not a right triangle

Step-by-step explanation:

39 square+32.5 square=48.5 square

1,521+1056.3=2, 352.3

2577.3=2352.3

it's not the same so the result it no

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