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4 years ago

HELP with all these please read instructions :)

Mathematics

2 answers:

a_sh-v [17]4 years ago

6 0

My guess for 7 is around $30. For 8: 36. 9: 161. And for 10: 6. I got those by adding the whole numbers together and if the decimal was 7, 8, or 9 adding 1 :) I hope this helps

yarga [219]4 years ago

3 0

7.) By clusterring $7.04 + $5.95 + $6.08 + $5.06 + $6.12 = $6.00 + $6.00 + $6.00 + $6.00 + $6.00 = $30.00

8.) 9.3 + 8.7 + 8.91 + 9.052 = 9 + 9 + 9 + 9 = 36

9.) 37.6 + 44.1 + 41 + 39.1 = 40 + 40 + 40 + 40 = 160

In clustering method you look for a whole number usually ending with 0 which all the given numbers "clustered" around.

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Answer:

y=43

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Step-by-step explanation:

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3 years ago

a car travels 120 mi. a second car, travelling 10 mph faster than the first car, makes the same trip in 1 hr less time. find the

Murrr4er [49]

Let x be the speed of the first car, then (x + 10) is the speed of the second car.

We can write the equation by the condition of the problem:

$\frac{120}{x}- \frac{120}{x+10}=1 \\ 120(x+10)-120(x)=1(x)(x+10) \\ 120x+1200-120x=x^2+10x \\ x^2+10x-1200=0 \\ D=b^2-4ac=10^2-4*1*(-1200) = 100+4800 = 4900 \\ x_{1,2}= \frac{-bб \sqrt{D} }{2a} \\ \\ x_1= \frac{-10- \sqrt{4900} }{2}= \frac{-10-70}{2} = -\frac{80}{2}=-40 \ \ \ \O$

$x_2= \frac{-10+ \sqrt{4900} }{2}= \frac{-10+70}{2} = \frac{60}{2}=30$ mph speed of the first car

Then 30+10=40 mph speed of the second car

Answer: 30mph and 40 mph.

I hope this helps.

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4 years ago

If possible please help me

guapka [62]

Answer:

I can't see the percentage number propaly but this is what I got so far.

housing = 192.5856

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entertainment = 35. 664

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3 years ago

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lesantik [10]

Answer:

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Step-by-step explanation:

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Alina [70]

Answer:

y=-15

Step-by-step explanation:

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3 years ago

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