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Hatshy [7]
3 years ago
6

Which expression is equivalent to 10 - 8

Mathematics
1 answer:
FromTheMoon [43]3 years ago
5 0

Answer:

2

Step-by-step explanation:

10-8=2

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What is 8 21/40 converted to a decimal
mrs_skeptik [129]
It would be 8.525
The 8 is 8
Divide 21 by 40
3 0
3 years ago
Find the sum of 10x^2-10x-6 and x+6.
Andre45 [30]

Answer:

10x²−9x

Step-by-step explanation:

10x²−10x−6+x+6

=10x²−10x−6+x+6

Combine Like Terms:

=10x²−10x−6+x+6

=(10x²)+(−10x+x)+(−6+6)

=10x²−9x

Hope this helps!

3 0
3 years ago
A random sample of 64 students at a university showed an average age of 20 years and a sample standard deviation of 4 years. The
adelina 88 [10]

Answer:

The 90%  confidence level is  19.15<  L  <   20.85

Step-by-step explanation:

From the question we are told that

     The sample size is  n =  64

     The mean age is  \= x  =  20  \ years

      The standard deviation  is   \sigma  =  4 \ years

 

Generally  the degree of freedom for this data set is mathematically represented as

        df  = n -  1

substituting values

        df  = 64 -  1

        df  = 63

Given that the level of confidence is  90%  the significance level is mathematically evaluated as

          \alpha  =  100 - 90

         \alpha  =10 %  

         \alpha   = 0.10

Now   \frac{\alpha }{2}  =  \frac{0.10}{2}  = 0.05

Since we are considering a on tail experiment

The  critical value for half of  this significance level at the calculated  degree of freedom is obtained from the critical value table as

           t_{df, \frac{ \alpha}{2}   } = t_{63,  0.05   } =  1.669

   The margin for error is mathematically represented as

          MOE  =  t_{df ,  \frac{\alpha }{2} } *  \frac{\sigma}{\sqrt{n} }

substituting values  

          MOE  = 1.699  *   \frac{4 }{\sqrt{64} }

         MOE  = 0.85

he 90% confidence interval for the true average age of all students in the university is evaluated as follows

           \= x - MOE  <  L  <  \= x  + E

substituting values  

         20  - 0. 85 <  L  <   20  + 0.85

         19.15<  L  <   20.85

4 0
3 years ago
A painter can paint 3 walls in one hour. Which graph models a relationship with the same unit rate?​
Irina18 [472]

Answer:

the bottom faded looking one

Step-by-step explanation:

5 0
3 years ago
The volumes of two solids are 135 in3 and 625 in3. Find the similarity ratio.
ludmilkaskok [199]
Formula for ration:

\dfrac{Volume_1}{Volume_2}  =  \bigg( \dfrac{Length_1}{Length_2} \bigg)^3

\text {Ratio = }   \sqrt[3]{\dfrac{135}{625} }  = \sqrt[3]{\dfrac{27}{125} }  =  \dfrac{3}{5}


Answer: Ratio = 3 : 5
4 0
4 years ago
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