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r-ruslan [8.4K]
3 years ago
9

Explain how to estimate 368+231 two different ways

Mathematics
1 answer:
Ghella [55]3 years ago
6 0
Well you can round the numbers like, 368 would be 370 and the 231 would be 230 and then you could add them together as they are and then you can round the number then
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Jason can travel 24 3/4 miles is 1/2 hour. what is his average speed in miles per hour?
nydimaria [60]
49 1/2 miles per hour
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3 years ago
Marianne has 5/8 pound of peas she cooks 2/3 of those peas for five people if each person is served an equal amount how much pea
Citrus2011 [14]
Weight of cooked peas is (2/3)(5 lb/8) = (10/24) lb, or (5/12) lb.

Divide this weight by 5 (people):


5
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12
---------- = 1/12 lb, or   16/12 oz   = 1.33 oz, or 4/3 oz.
5




8 0
4 years ago
A lab is trying to determine if a new medication is effective at reducing acne breakouts. The results are displayed in the Venn
In-s [12.5K]

Answer:

its %60 i just took the test and got it right

Step-by-step explanation:

7 0
3 years ago
In a recent year, a sample of grade 8 Washington State public school students taking a mathematics assessment test had a mean sc
Daniel [21]

Answer:

The  number is  N  =1147 students

Step-by-step explanation:

From the question we are told that

    The population mean is  \mu  =  281

     The standard deviation is  \sigma  =  34.4

    The sample size is  n = 2000

percentage of the would you expect to have a score between 250 and 305 is mathematically represented as

      P(250 <  X <  305 ) =  P(\frac{ 250 - 281}{34.4 }  <  \frac{X - \mu }{\sigma }  < \frac{ 305 - 281}{34.4 }   )

Generally  

             \frac{X - \mu }{\sigma }  =  Z  (Standardized \ value \  of  \  X )

So  

         P(250 <  X <  305 ) =  P(-0.9012<  Z

       P(250 <  X <  305 ) = P(z_2 < 0.698 ) -  P(z_1 <  -0.9012)

From the z table  the value of  P( z_2 < 0.698) =  0.75741

                                         and  P(z_1 < -0.9012) =  0.18374

     P(250 <  X <  305 ) = 0.75741 - 0.18374

      P(250 <  X <  305 ) =  0.57

The  percentage is  P(250 <  X <  305 ) =  57\%

The  number of students that will get this score is

           N  = 2000 * 0.57

           N  =1147

6 0
3 years ago
What is the value of x if the sides of a equilateral triangle are x+9 , 3x-9 , and 2x
Yakvenalex [24]

Answer:

x=9

Step-by-step explanation:

The triangle is equilateral which means the sides are equal.

x+9 = 2x

Subtract x from each side

x+9-x = 2x-x

9 =x

3 0
3 years ago
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