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MatroZZZ [7]
3 years ago
8

Using the graph, select an answer.

Mathematics
1 answer:
saul85 [17]3 years ago
6 0

Answer:

there's no graph??

Step-by-step explanation:

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If a photocopier makes copies in 1/3 s, then at the same rate, how many copies does it make in 4 minutes?
irina1246 [14]

Answer:

80 copies

Step-by-step explanation:

4 minutes= 240 seconds. So I did 240 seconds divided by 3 seconds (one copy is made in that time) then you get 80. I don't know if that explanation make sense but the math checks out.

3 0
3 years ago
Bivariate Data problem. Image attached. <br><br> A. 5.967<br> B. 6.671<br> C. 9.352<br> D. 9.338
Fed [463]

Answer:

A

Step-by-step explanation:

s_x  is the standard deviation of x.

The standard deviation is gotten by:

1. find the average of x-values (add up all the values and divide by number of numbers, which is 5)

2. subtract the average, x bar, from each of the values, square it,  and add up the difference

3. Divide that final answer by n, which is 5

4. Take the square root of the answer

<em>Now, let's find the average (x bar):</em>

<em>x bar = \frac{2+6+9+14+19}{5}=10</em>

<em />

<em>Doing steps 2 & 3 together:</em>

<em>\frac{(2-10)^2+(6-10)^2+(9-10)^2+(14-10)^2+(19-10)^2}{5}\\=35.6</em>

<em />

<em>Doing step 4:</em>

<em>\sqrt{35.6} =5.967</em>

<em />

Correct answer is A

<em />

7 0
4 years ago
HELP MARKING BRAINLEST IF UR CORRECT PLSS
Liula [17]

Answer:

34

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
A rectangle has a height of k^2+3k 2 +3k, squared, plus, 3 and a width of k^2+7k 2 +7k, squared, plus, 7. Express the area of th
vlada-n [284]

Answer: k^4+10k^3+21k^2

Step-by-step explanation:

Given

Height of rectangle is h=k^2+3k

Width is w=k^2+7k

The area of the rectangle is given by the multiplication of the height and width

\Rightarrow A=\left(k^2+3k\right)\left(k^2+7k\right)\\\\\Rightarrow A=k^2k^2+k^2\cdot \:7k+3kk^2+3k\cdot \:7k\\\\\Rightarrow A=k^4+10k^3+21k^2

Thus, the area of the rectangle is k^4+10k^3+21k^2.

3 0
3 years ago
The area of a rectangle is 56 meters. the lengthe th is 2 cm moran x and the width is 5 cm less than twice x. solve for x
olya-2409 [2.1K]
You can write the dimensions of the rectangle as (x + 2) and (x - 5), and because the area is base × height, you can multiply the brackets together and make it equal to 56:

(x + 2)(2x - 5) = 56
2x² + 4x - 5x - 10 = 56
x² - x - 10 = 56

Now because you have an x², you need to make the equation equal to 0 so you can factorise, so:

2x² - x - 10 = 56
- 56
2x² - x - 66 = 0
(x - 6)(2x + 11)

So x is 6, because the other option is -5.5 and you cannot have a negative length.

I hope this helps!
8 0
3 years ago
Read 2 more answers
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