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Verdich [7]
3 years ago
7

I dont know how to put 2x(x + 5) in expanded form

Mathematics
2 answers:
Bond [772]3 years ago
8 0
(X+X+X) + (
X+X+X+X+X+X+X+X+X+X+X+X)
GaryK [48]3 years ago
3 0

Answer:

10 x + 2 x^2

Step-by-step explanation:

Expand the following:

2 x (x + 5)

Hint: | Distribute 2 x over x + 5.

2 x (x + 5) = 2 x×5 + 2 x x:

2 x×5 + 2 x x

Hint: | Multiply 2 and 5 together.

2×5 = 10:

10 x + 2 x x

Hint: | Combine products of like terms.

2 x x = 2 x^2:

Answer: 10 x + 2 x^2

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Patty’s gymnastics class is 5/6 of an hour long. Patty practices five different skills and spends the same amount of time on eac
s344n2d4d5 [400]

Answer:

10 minutes

Step-by-step explanation:

5/6 of an hours is 50 min. Assume x is the time she spends on each skill.

5x=50

x=10

4 0
3 years ago
I need answers for #3 and #4
NNADVOKAT [17]

Answer:#3- C. E=155

#4- I think it's G‍♀️

8 0
3 years ago
A=1/3b then b=?a i really want the answer
scoray [572]

Answer:

b=3a

Step-by-step explanation:

1/3b times 3 = b

a times 3 = 3a

4 0
3 years ago
In a Pew Research Center poll of 745 randomly selected adults, 589 said that it is morally wrong to not report all income on tax
Nikolay [14]

Answer:

a

 

   The  null hypothesis is  H_o  :  p =  0.75

  The  alternative  hypothesis is  H_a  :  p \ne  0.75

b

   t = 2.51

c

   p-value  =  0.01207

d

 There no sufficient evidence to conclude that 75% of adults say that it is morally wrong to not report all income on tax returns

Step-by-step explanation:

From the question we are told that

    The  sample  size is  n  =  745

     The  number that said it is morally wrong is  k  =  589

       The  level of significance is  \alpha =  0.01

        The population proportion is p  =  0.75

Generally the sample  proportion is mathematically represented as

        \r p  =  \frac{k}{n}

=>     \r p  =  \frac{589}{745}

=>     \r p  =  0.79

 The  null hypothesis is  H_o  :  p =  0.75

  The  alternative  hypothesis is  H_a  :  p \ne  0.75

The  standard error is mathematically represented as

     SE =  \sqrt{\frac{p(1-p)}{n} }

=>    SE =  \sqrt{\frac{0.75(1-0.75)}{745} }

=>    SE  =0.0159

Generally the test statistics is mathematically represented as

      t =  \frac{\r p - p }{SE}

=>   t =  \frac{0.79 - 0.75 }{0.0159}

=>    t = 2.51

Generally the p-value is  mathematically represented as

        p-value  =  2 * P(Z >  2.51)

From the the z-table  

            P(Z >  2.51) = 0.0060366

=>   p-value  =  2 * 0.0060366

=>   p-value  =  0.01207

From the calculation  p-value >\alpha

    Hence we fail to reject the null hypothesis

Thus there no sufficient evidence to conclude that 75% of adults say that it is morally wrong to not report all income on tax returns

     

7 0
3 years ago
PLS HELP<br> What is the area of the triangle?
Rom4ik [11]

Answer:

B

Step-by-step explanation:

(base x height)/2 = (2.9 x 8.1)/2 = 11.7 cm^2

5 0
3 years ago
Read 2 more answers
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