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3 years ago

The cost of ordering multiple items is sometimes, always or never proportional

1 answer:

8 0

Unless there is no promotion like "buy 2 get 1 free" or "buy 2 get 1 for 50%" etc. then the cost of ordering multiple items is always proportional. Let's say something costs $5. Two items will cost $10, three $15, four $20 etc. These numbers are all proportional. Hopefully that's what you meant :)

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I also need work for these 2 questions

frozen [14]

question 1: irrational,real

question 2: rational,real

7 0

3 years ago

Read 2 more answers

A is the poin 3,5 and b is the point 0,k if the distance of ab is 5 units find the possible value of k

JulijaS [17]

Answer:

K is either 9 or 1

Step-by-step explanation:

Sqrt((0 - 3)² + (k - 5)²) = 5

Square both sides

(0 - 3)² + (k - 5)² = 5²

(0 - 3)² + (k - 5)² = 25

-3² + (k - 5)² = 25

9 + (k-5)(k-5) = 25

9 + k² - 5k - 5k + 25 - 25 = 0

k² - 10k +9 = 0

k² - 9k - k + 9 = 0

k(k - 9) - 1(k - 9) = 0

k - 1 = 0 ; k = 1

k - 9 = 9; k = 1

K = 9 or k = 1

K is either 9 or 1

4 0

3 years ago

Divide 2x^4 -5x^3+3-1 by 2x -1 <br> please help and please show the steps on how you did it

MaRussiya [10]

The answer below (I need 20 characters to respond so just ignore the words between the parenthesis on this response)

4 0

3 years ago

Please help! what equation best models this data?

kolezko [41]

Answer:

P = 309.35 + 2.31t

Step-by-step explanation:

The relation between the population of the USA and the time in years after 2010 will be linear as the increase in population is constant for every year since 2010 which is 2.31 million.

So, we can model the population P in million as a function of time(t) in years since 2010 as

P = 309.35 + 2.31t ....... (1)

Now, for t = 0 i.e. in the year 2010, the population will be obtained from equation (1) to be 309.35 million.

(Answer)

8 0

3 years ago

How to do this?

Mandarinka [93]

This equation uses two properties of logarithms:

$\ln(g^x) = x \ln(g)$

$\ln(a) + \ln(b) = \ln(ab)$

So you could take the ln from left and right hand side in the equation, and get:

(2-x)ln 3 = x ln 5

then

2 ln 3 - x ln 3 - x ln 5 = 0 =>

x(ln 3 + ln 5) = 2 ln 3

so x = 2 ln 3 / (ln3 + ln5)

Now using the 1st property you can say 2 ln 3 is ln 3² = ln9
and using the 2nd property you can say ln3 + ln5 = ln15

so x= ln9 / ln15

7 0

3 years ago