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2 years ago

Knitting a scarf. On average she can knit 2 mm in 35 minutes. Express this as a rate in mm/min

Mathematics

1 answer:

Natali5045456 [20]2 years ago

8 0

Answer:

she can knit 1mm/17.5min or she can knit 1mm in 17 minutes and 30 seconds.

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Standard deviation 12,16,22,23,34,44,46,47,48,64,67,73,83,89, round to nearest tenth

RideAnS [48]

Answer: 23.9

Step-by-step explanation:

1. First, you must calculate the mean, as following:

$\frac{12+16+22+23+34+44+46+47+48+64+67+73+83+89}{14}=47.71$

2. Now, you should substract the means obtained to every single number of the set and then square it. Add all of them:

$(12-47.71)^{2}+(16-47.71)^{2}+(22-47.71)^{2}+(23-47.71)^{2}+(34-47.71)^{2}+(44-47.71)^{2}+(46-47.71)^{2}+(47-47.71)^{2}+(48-47.71)^{2}+(64-47.71)^{2}+(67-47.71)^{2}+(73-47.71)^{2}+(83-47.71)^{2}+(89-47.71)^{2}=7984.86$

3. The mean of this is:

$\frac{7984.8574}{14}=570.35$

4. The square root of this result is:

$\sqrt{2.52}=23.88$

5. To the nearest tenth, the result is: 23.9

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2 years ago

Which is a possible equation of a parabola that intersects the x-axis at points (-1,0) and (3,0)? Question 2 options: y=x2+3x−3

olga2289 [7]

Answer:

Step-by-step explanation:

Where a graph intersects the x-axis is where the solutions or zeros of the quadratic are found...where y = 0.

If the points of intersection are x = -1 and x = 3, then putting those into factors gives us (x + 1)(x - 3) = 0. FOIL that out to get the quadratic.

$x^2-3x+x-3$ which simplifies to

$x^2-2x-3=y$

Looks like the third option there.

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3 years ago

Which is another way to write two hundred ten million sixty-four thousand fifty ?

avanturin [10]

<span>You can write this number with digits, which would be 210,640,050. You could also write it in standard form, which would be 2.1064005 x 10^8.</span>

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3 years ago

Which graph represents y = –4x + 4? HURRY PLEASE HELP!!

Agata [3.3K]

Y=-4x+4
-4 is the gradient
So it goes downwards
+4 is the y intercept so where it crosses the y axis
Bottom right one

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2 years ago

Alyssa invested $180 in an account paying an interest rate of 8 and 3/8 % compounded annually. Lily invested $180 in an account

dem82 [27]

Answer:

Step-by-step explanation:

Please check out the attachments for the solution :)

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3 years ago

Knitting a scarf. On average she can knit 2 mm in 35 minutes. Express this as a rate in mm/min​

Knitting a scarf. On average she can knit 2 mm in 35 minutes. Express this as a rate in mm/min