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shutvik [7]
3 years ago
10

Please help ! 20 POINTS

Mathematics
1 answer:
Serhud [2]3 years ago
4 0

Answer: B

If you multiply equation 1 by -5 you get: -10x-y=3.

If you multiply equation 2 by 2 you get: 10x+4y=14

Add the systems together to eliminate x.

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Susan has 343 cookies. She packs as many of them as she can equally in 19 boxes. She gives the rest to Mike. How many cookies do
Oksana_A [137]

Answer:

Mike gets just one cookie because she puts 18 cookies in 19 box which will be 19*18 = 342 so just one left

Step-by-step explanation:

I'm feeling bad for Mike to be honest that he just gets one

5 0
2 years ago
Find the sum of the first 10<br> terms.<br> 40,37,34,31,...
MArishka [77]

Answer:

It seems each number is 3 less than the previous number.

We must sum these 10 numbers

40, 37, 34, 31, 28, 25, 22, 19, 16, 13

The sum would equal the average of the middle 2 numbers times 10.

(28 + 25) / 2 = 53 / 2 = 26.5

We multiply by 10 because there are 10 numbers and this equals

265

Step-by-step explanation:

3 0
3 years ago
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The radius of a sphere is increasing at a rate of 5 mm/s. How fast is the volume increasing (in mm3/s) when the diameter is 40 m
jeka94

9514 1404 393

Answer:

  8000π mm^3/s ≈ 25,133 mm^3/s

Step-by-step explanation:

The rate of change of volume is found by differentiating the volume formula with respect to time.

  V = 4/3πr^3

  V' = 4πr^2·r'

For the given numbers, this is ...

  V' = 4π(20 mm)^2·(5 mm/s) = 8000π mm^3/s ≈ 25,133 mm^3/s

_____

<em>Additional comment</em>

By comparing the derivative to the area formula for a sphere, you see that the rate of change of volume is the product of the area and the rate of change of radius. This sort of relationship will be seen for a number of different shapes.

4 0
3 years ago
Suppose the null hypothesis is not rejected. State the conclusion based on the results of the test. Three years​ ago, the mean p
Likurg_2 [28]

Answer:

A. There is not sufficient evidence to conclude that the mean price of a​ single-family home has decreased

Step-by-step explanation:

To study : Whether the mean price of single family home has decreased or not -

Null Hypothesis [H0] = There is no change in mean price of single family home

Alternate Hypothesis [H1] = There is change (decrease) in mean price of single family home

If the null hypothesis is not rejected, it implies that 'there is no change in mean price of single family home' has been statistically accepted.

So, it states that - There is not sufficient evidence to conclude that the mean price of a​ single-family home has decreased

6 0
3 years ago
Which equation represents the partial sum of the geometric series?
user100 [1]

Answer:

B

Step-by-step explanation:

4 0
3 years ago
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