Ask question

Ask question

All categories

2 years ago

5

Sommer bought a baseball card for x dollars. Later, she sold it for 1.4x dollars. Which is another way to describe the change in

the price of the baseball card?
A. $0.04 increase
B. $0.40 increase
C. 4% increase
D. 40% increase

1 answer:

svp [43]2 years ago

4 0

Answer is D. 40% increase.

You might be interested in

The diagram represents the factorization of a2+8a+12. A 2-column table with 2 rows. First column is labeled a with entries a squ

Lapatulllka [165]

Answer:

(A)6

Step-by-step explanation:

Given the quadratic expression: $a^2+8a+12$

We factorize:

$a^2+8a+12=a^2+6a+2a+12\\=a(a+6)+2(a+6)\\=(a+2)(a+6)$

Therefore, the missing number that will complete the factorization is 6.

3 0

2 years ago

Read 2 more answers

Beaker A contains 4 1/3 fluid ounces, while beaker B contains 4 3/10 of water . Which beaker has the smaller amount of water

kirill [66]

Beaker A contains more water.
First,find equivalent fraction.
Next,compare the amounts you will see Beaker A contains more water.
Therefore,Beaker A contains more water.

8 0

2 years ago

Find the correlation coefficient of the line of best fit for the points (-3,-40), (1,12), (5,72), (7,137). Explain how you guy y

vodka [1.7K]

Answer:

r = 0.9825; good correlation.

Step-by-step explanation:

One formula for the correlation coefficient is

$r = \dfrac{n\sum{xy} - \sum{x} \sum{y}}{\sqrt{n\left [\sum{x}^{2}-\left (\sum{x}\right )^{2}\right]\left [\sum{y}^{2}-\left (\sum{y}\right )^{2}\right]}}$

The calculation is not difficult, but it is tedious.

1. Calculate the intermediate numbers

We can display them in a table.

<u> </u><u>x</u> <u> y </u> <u> xy </u> <u> x² </u> <u> y² </u>

-3 -40 120 9 1600

1 12 12 1 144

5 72 360 25 5184

<u> 7</u> <u>137</u> <u> 959</u> <u>49</u> <u>18769 </u>

Σ = 10 181 1451 84 25697

2. Calculate the correlation coefficient

$r = \dfrac{n\sum{xy} - \sum{x} \sum{y}}{\sqrt{\left [n\sum{x}^{2}-\left (\sum{x}\right )^{2}\right]\left [n\sum{y}^{2}-\left (\sum{y}\right )^{2}\right]}}\\\\= \dfrac{4\times 1451 - 10\times 181}{\sqrt{[4\times 84 - 10^{2}][4\times25697 - 181^{2}]}}\\\\= \dfrac{5804 - 1810}{\sqrt{[336 - 100][102788 - 32761]}}\\\\= \dfrac{3994}{\sqrt{236\times70027}}\\\\= \dfrac{3994}{\sqrt{16526372}}\\\\= \dfrac{3994}{4065}\\\\= \mathbf{0.9825}$

The closer the value of r is to +1 or -1, the better the correlation is. The values of x and y are highly correlated.

3 0

2 years ago

The Rotation is a 60° rotation about O, the center of the regular hexagon. State the image of B for the following rotation. R2-R

Luda [366]

Answer: B. I got it correct on my assignment.

5 0

2 years ago

As the number of phones produced increases, wil the working rate ever get to 100%? Explain.

evablogger [386]

No, just because the phones produced Increases it doesn’t mean that the work rate will get up to 100%. There can always be more workers.

6 0

2 years ago

Read 2 more answers