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3 years ago

I have 7 minutes please help

Mathematics

1 answer:

bagirrra123 [75]3 years ago

7 0

Answer:

None of them

Step-by-step explanation:

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Apply the distributive property to factor out the greatest common factor. 250 – 150r

zysi [14]

Answer:

50(5-3r)

Step-by-step explanation:

I found their GCF which is 50 and used the distributive property to find 50(5-3r)

7 0

3 years ago

Online jewelry sales have increased steadily over the last 10 years. In 2003, sales were approximately 2 billion dollars, and in

KiRa [710]

Answer: (i) The unit rate at which online jewelry sales have been increasing is 1.33 billion dollars per year.

(ii) The online jewelry sales in 2019 will be 191.7 billion dollars.

Step-by-step explanation:

In 2003, sales were approximately 2 billion dollars and in 2010, they were approximately 14.8 billion dollars.

(i) If $x$ is the number of years after 2003 and $y$ is the amount of sales....

then the equation will be: $y= ab^x$ , where $a$ is the initial amount and $b$ is the growth rate.

for 2003, $x=0$ and for 2010, $x=7$

So, the two points in form of (x, y) will be: $(0,2)$ and $(7,14.8)$

Now plugging these two points int the above equation....

$2= ab^0\\ \\ a= 2\\ \\ and\\ \\ 14.8=ab^7\\ \\ 14.8=2*b^7\\ \\ b^7=7.4\\ \\b= \sqrt[7]{7.4}=1.3309.... \approx 1.33$

Thus, the online jewelry sales have been increasing at a rate of 1.33 billion dollars per year.

(ii) As we got $a=2$ and $b=1.33$ , so the equation will be now: $y= 2(1.33)^x$

For the year 2019, the value of $x$ will be: (2019-2003) = 16

So plugging $x=16$ into the above equation, we will get.....

$y=2(1.33)^16\\ \\ y=191.7150... \approx 191.7$

(Rounded to the nearest tenth)

Thus, the online jewelry sales in 2019 will be 191.7 billion dollars.

6 0

3 years ago

Linear equation 3+X=-2

lyudmila [28]

Answer:

x = -5

Step-by-step explanation:

3+X=-2

Subtract 3 from each side

3-3+X=-2-3

x = -5

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Evaluate 5(x+y); use x=1,and y=1

miskamm [114]

Answer:

5 (1+1)=5 (2)=10

Step-by-step explanation:

you just substitute both X and Y with 1 and calculate it

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3 years ago

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an someone please help me: A football field measures 300 feet in length. It can also be expressed as approximately 5.7 times 10

bonufazy [111]

Answer:

b i took the test that was the right answer

Step-by-step explanation:

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