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AnnyKZ [126]
3 years ago
10

13+(14+x)=. please answer

Mathematics
1 answer:
Mumz [18]3 years ago
5 0
27+x simplify the expression
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What is 8/9 times 212
andrew-mc [135]
Calculator answer: 2,213.444444444444
8 0
3 years ago
Find the perimeter??? Anyone?!!!!
sweet [91]

Answer:

a.) 2(2x)+2(4x-3)

b.)2(2x)+2(4x-3)=42

Step-by-step explanation:

b.)2(2x)+2(4x-3)=42

distribute

4x+8x-3=42

add the like terms

12x-3=42

move the -3 by adding to both sides

12x=45

divide both sides by 12

12x/12=45/12

x=3.75

and to make sure it's right, plug x into the equation.

2(2(3.75))+2(4(3.75)-3)=42

now multiply/add/subtract everything.

2x2x3.75=15 (This was the 1st set of parenthesis)

2x4x3.75-3=27 (This was the 2nd set of parenthesis)

15+27=42

42=42

5 0
3 years ago
A recent CBS News survey reported that 64% of adults felt the U.S. Treasury should continue making pennies. Suppose we select a
enyata [817]

Complete Question

A recent CBS News survey reported that 64% of adults felt the U.S. Treasury should continue making pennies. Suppose we select a sample of 18 adults.

a-1. How many of the 18 would we expect to indicate that the Treasury should continue making pennies

a-2) What is the standard deviation?

a-3) What is the likelihood that exactly 3 adults would indicate the Treasury should continue making pennies?

Answer:

a-1 \= x = 11 .52

a-2  \sigma  = 2.036

a-3 P(3) =  4.7*10^{-5}

Step-by-step explanation:

From the question we are told that

  The sample size is  n =  18

  The proportion of adult that  felt the U.S. Treasury should continue making pennies is p =  0.64

 The proportion of adult that  feel otherwise is

q = 1- p = 1-0.64 = 0.36

 The mean is mathematically evaluated as

      \= x =  n * p

substituting values

  \= x = 18 * 0.64

   \= x = 11 .52

The standard deviation is mathematically represented as

       \sigma  =  \sqrt{ npq}

substituting values

      \sigma  =  \sqrt{18 * 0.64 * 0.36}

      \sigma  = 2.036

The likelihood that 3 adult would indicate  the Treasury should continue making pennies is mathematically evaluated as

    P(3) = \left  n} \atop  \right. C_3  (p)^{3} * (q)^{n-3}

Now

    \left  n} \atop  \right. C_3 =  \frac{n! }{[n-3] ! 3!}

substituting values

    \left  n} \atop  \right. C_3 =  \frac{18! }{[15] ! 3!}

    \left  n} \atop  \right. C_3 =  \frac{18 * 17 * 16 * 15! }{[15] ! (3 *2 *1 )}

   \left  n} \atop  \right. C_3 =  \frac{18 * 17 * 16 }{ (3 *2 *1 )}

   \left  n} \atop  \right. C_3 =  816    

So

    P(3) =  816 * (0.64 )^3 * (0.36 )^{18-3}

    P(3) =  4.7*10^{-5}

8 0
3 years ago
How many solutions does the following equation have?
Genrish500 [490]

Answer:

1 solution

Step-by-step explanation:

-6y + 13 + 9y = 8y - 3

=> 3y - 8y = -3 - 13

=> -5y = -16

=> y = 16/5

so y= 16/5 or 3.20

4 0
4 years ago
Lemma 2.3.2 (Multiplication is commutative). Let n,m be natural питbers. hen n x m = mхп.
Paraphin [41]

Answer:

Multiplication is commutative.          

Step-by-step explanation:

Let n,m be two natural numbers.

We have to show that n\times m=m\times n

We will prove this by induction

For n = 1, we have n\times 1 = 1\times n = n, which is true.

Let the given statement be true for n-1 natural numbers, that is,

(n-1)\times m = m\times (n-1)

Now, we have to show that it is true for n natural numbers.

nm = (n-1)m + m = m(n-1) + m

which is equal to

(m-1)(n-1) + (n-1) + m

= (m-1)(n-1) + (m-1) + n

= n(m-1) + n

= (m-1)n + n

= mn

Hence, by principal of mathematical induction, the given statement is true for all natural numbers.

6 0
3 years ago
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