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ratelena [41]
3 years ago
8

How would you solve this problem 999 + 587 = 1000 + what = what ? How would this problem be solved

Mathematics
2 answers:
rewona [7]3 years ago
7 0

Answer:

999+587 = 1000+586

both of them equals 1586

HOPE IT HELPS

bija089 [108]3 years ago
3 0

Answer:

2,586

Step-by-step explanation:

Add 1000+1000

2000

Since its 999 not 1000 subtract 1

1999

Now add 1 and subtract 1 from 587

Then add 2000 with 586

2,586

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Sarah traveled 145 miles in<br> 2.5 hours. How fast was<br> Sarah driving?<br> Ma
Ad libitum [116K]

Answer:

58 mph

Step-by-step explanation:

145/2.5=1450/25=58

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3 years ago
Plz help meI will mark u brainliest 2.. Write an expression that represents the amount of money they collected each night. The t
vladimir1956 [14]

Answer:

143a + 221b = 1,651

Step-by-step explanation

143a + 221b = 1,651

1.Add the "a"s and "b"s together seperatly.

2.Then put them together in a equation.

3.The a you added together is 143a.The b you added together is 221b.

6 0
3 years ago
What is the slope of the line containing (-2,5) and (4, -4)?
Musya8 [376]

Answer: slope is -3/2

Step-by-step explanation:

(-2,5) (4,-4)

Use the slope formula y2-y1/x2-x1

5-(-4)/-2-4 = -3/2

6 0
2 years ago
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Regular price : $90, discount percent : 40%
Alex17521 [72]
90 x 0.4 = 36

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3 years ago
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A manufacturer of running shoes knows that the average lifetime for a particular model of shoes is 15 months. Someone in the res
AveGali [126]

Answer:

The decision rule is  

Fail to reject the null hypothesis

 The conclusion is  

There is no sufficient evidence to show that  the  designer's claim of a better shoe is supported by the trial results.

Step-by-step explanation:

From the question we are told that

  The population mean is  \mu = 15 \ months

   The sample size is  n =  25

   The sample mean is  \= x  = 17 \ months

   The standard deviation is  s = 5.5 \ months

Let assume the level of significance of this test is  \alpha  = 0.05

    The null hypothesis is  H_o :  \mu = 15

     The alternative hypothesis is  H_a : \mu  > 17

Generally the degree of freedom is mathematically represented as  

         df = n -1

=>       df = 25 -1

=>       df = 24

Generally the test statistics is mathematically represented as

        t = \frac{\= x- \mu }{\frac{s}{\sqrt{n} } }

=>   t = \frac{ 17 - 15 }{\frac{5.5}{\sqrt{25} } }

=>   t =  1.8182

Generally from the student t distribution table the probability of obtaining   t =  1.8182 to the right of the curve at a degree of freedom of df = 24  is  

    p-value  = P(t > 0.18182 ) = 0.4286

From the value obtained we see that  p-value > \alpha hence

The decision rule is  

Fail to reject the null hypothesis

 The conclusion is  

There is no sufficient evidence to show that  the  designer's claim of a better shoe is  supported by the trial results.

7 0
2 years ago
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