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GREYUIT [131]
3 years ago
9

Help me please thank you

Mathematics
2 answers:
telo118 [61]3 years ago
4 0

Answer:

c

Step-by-step explanation:

thats the answer

dimulka [17.4K]3 years ago
3 0

Answer:

Answer: 0.78: B

Step-by-step explanation:

2.34+0.78= 3.12 its the same in the whole problem add 0.78

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Which property explains the step shown in solving the equation?8x − 15 + 6x = 10x − 18 ⇒ 8x + 6x − 15 = 10x − 18
vlada-n [284]

Answer:

Taybrownies1359Step-by-step explanation:

np

7 0
3 years ago
An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an est
amid [387]

Answer:

(38.1,88.6)

Step-by-step explanation:

We are given the following in the question:

Sample mean, \bar{x} = 38.3

Sample size, n = 695

Alpha, α = 0.05

Population standard deviation, σ = 3.6

95% Confidence interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

38.3 \pm 1.96(\frac{3.6}{\sqrt{695}} ) = 38.3 \pm 0.267 = (38.033,38.567) \approx (38.1,88.6)

8 0
3 years ago
4) Find the volume of the pyramid.
Ahat [919]

Answer:

672

Step-by-step explanation:

12 * 12 = 144

144* 14 = 2016

2016 / 3 = 672.

3 0
2 years ago
Read 2 more answers
Five added to 6 times a number is equal to 2 less than 8 times the number. What is the number?
Morgarella [4.7K]
30N=2-8N

Subtract 8N from 30N and you get 22N.

22N=2

Divide by 22 on both sides. You get N=2/22

So your answer is N=1/11
8 0
3 years ago
Janet and Kyle each purchase Blu Ray discs and Cd's from Amazon. Janet buys 3 Blu ray and 2 Cd's for $58. Kyle buys 1 Blu Ray an
polet [3.4K]

Answer:

y = 20   x = 6

Step-by-step explanation:

1 (3x+ 2y = 58 ------------>  -3x + -2y = -58

1x + 2y = 46 -------------->    1x + 2y = 46  

                                              ____________

                                                -2x  =  -12

                                               -----------------

                                                -2x       -2x

                                                 x = 6

3(6) + 2y = 58

18 + 2y = 58

-18          -18                                    

------------------

       2y = 40

      -----  -----

       2y     2y

y = 20

                                               

                                           

7 0
3 years ago
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