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snow_lady [41]
3 years ago
5

HELP HELP HELP PLEASE HELP!!!!!!!!!!!!!! I NEED HELP!!!!!!!!!!!!!!!!!! I need this question answered ASAP!!! I need my grade to

go up from a C to an A and I need to know how to do it and the work needs to be shown!!!
A tank holds 50 cubic feet of gas to heat a home. The table shows the amount of gas left in the tank after five consecutive weeks. What is the rate of change?
The table is: Weeks: 1 2 3 4 5
Gas(ft): 44 38 32 26 20
Mathematics
1 answer:
Mashcka [7]3 years ago
3 0
The rate of change is for every 1 week it looses 6 feet of gas
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Approximately 4/5 ofd US home owners have cell phones. What percent of homeowners do not have cell phones?
zheka24 [161]
If 4/5 do, then 1/5 dont
1/5=x/100
x=20
20%
5 0
3 years ago
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Stacey's fruit salad recipe uses proportional amounts of different fruits. There are 2 cups of grapes for every 5 cups of pineap
jenyasd209 [6]

Answer:

If 5 p = 2 g    then g = 5 p / 2 = 2.5 p

4 0
3 years ago
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The variance of a distribution is 195. What is the standard deviation, rounded to the nearest thousandth?
stiks02 [169]

Given:

The variance of a distribution = 195.

To find:

The standard deviation, rounded to the nearest thousandth.

Solution:

Standard deviation of a distribution is the square root of the variance of the distribution.

Here, the standard deviation of the distribution is

S.D.=\sqrt{195}

S.D.=13.96424

S.D.\approx 13.964

Therefore, the standard deviation is 13.964.

8 0
3 years ago
Which graph represents a quadratic function with a vertex at (0, 0)?
maxonik [38]
The 3rd one. (where the round part of the graph is at 0, 0) because that is where the y axis meets
7 0
3 years ago
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Please I really need help
ohaa [14]

9514 1404 393

Answer:

  • scale factor: 3
  • rule: (x, y) ⇒ (3x +15, 3y -24)
  • center: (-7.5, 12)

Step-by-step explanation:

The scale factor can be found by comparing the length of CB to the length of RQ.

  B-C = (-2, 8) -(-4, 9) = (2, -1)

  Q-R = (9, 0) -(3, 3) = (6, -3)

The length of RQ is clearly 3 times the length of CB, so the scale factor (k) is ...

  ratio of corresponding differences = 6/2 = -3/-1 = 3 . . . . . scale factor

__

We know that for dilation about a point O, the distance from O is multiplied by the scale factor. For dilation of point B to point Q, this means ...

  k(B -O) = (Q -O)

Solving for Q, we get ...

  Q = kB -kO +O . . . . this is what our dilation rule will look like.

The quantity O-kO can be found by subtracting kB:

  Q -kB = O -kO = O(1 -k)

This is what we need for our dilation rule.

  Q -kB = (9, 0) -3(-2, 8) = (9+6, 0-24) = (15, -24)

So, our dilation rule is ...

  (x, y) ⇒ k(x, y) +(15, -24)

  (x, y) ⇒ (3x +15, 3y -24) . . . . . dilation rule

__

The center of dilation can be found from ...

  (Q -kB)/(1 -k) = O

  O = (15, -24)/(1 -3) = (-7.5, 12)

The center of dilation is (-7.5, 12).

_____

<em>Additional comments</em>

On the graph, the center of dilation can be found by drawing a line through a point and its image. (Points are always dilated along a line through the center of dilation.) The intersection of two such lines is the center of dilation.

On this graph, the center is just above the top edge of the chart, at point (-7.5, 12). You can see this if you carefully draw lines BQ and AP.

You usually have coordinates for two original points and two image points, so finding the scale factor the way we did is not difficult. If you just have one point on the original and the image, the scale factor is found by finding their distances from the center of dilation. Each image point is k times as far as each original point from that center.

7 0
3 years ago
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