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andriy [413]
3 years ago
15

God i don't understand this at all dkfjdfkgh thanks if you help, not really sure how brainly works

Mathematics
2 answers:
skad [1K]3 years ago
8 0

Answer:

Step-by-step explanation:

Spas

IrinaK [193]3 years ago
6 0

Answer:

17

Step-by-step explanation:

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Item 29<br> Divide.<br> 6.8÷4<br> 6.8÷4
Ket [755]

Answer:

1.7

Step-by-step explanation:

You can just use a calculator to make the work easier.

7 0
2 years ago
The coordinates of the vertices of a rectangle are (-2, 3), (4, -4), (4, 3), and (-2, -4). What are the dimensions of the rectan
erik [133]

Answer:

D

Step-by-step explanation:

Graph the points. Then count the units vertically and horizontally. See picture.

7 0
3 years ago
Simplify the expression below:
kifflom [539]

Answer:

C. -7x^2 - 28

Step-by-step explanation:

Firstly simplify the bracket before doing anything;

4x(3x - 7) = 12x^2 - 28x

then go back to the question and substitute the expression(12x^2 - 28x) on the bracket and then work out the question;

12x^2 - 28x -19x^2...then group the values with the same exponent of x,

(12x^2 - 19x^2) - 28x

; -7x^2 - 28x

6 0
3 years ago
To
yanalaym [24]

Answer:

I think it's 56 students have a gadgets

5 0
2 years ago
Game consoles: A poll surveyed 341 video gamers, and 89 of them said that they prefer playing games on a console, rather than a
Orlov [11]

Answer:

Step-by-step explanation:

Hello!

The objective is to test if the population proportion of gamers that prefer consoles is less than 28% as the manufacturer claims.

Of 341 surveyed players, 89 said that they prefer using a console.

The sample resulting sample proportion is p'= 89/341= 0.26

If the company claims is true then p<0.28, this will be the alternative hypothesis of the test.

H₀: p ≥ 0.28

H₁: p < 0.28

α: 0.05

To study the population proportion you have to use the approximation of the standard normal Z= \frac{p'-p}{\sqrt{\frac{p(1-p)}{n} } }≈N(0;1)

Z_{H_0}= \frac{0.26-0.28}{\sqrt{\frac{0.28*0.72}{341} } }= -0.82

This test is one-tailed left, i.e. that you'll reject the null hypothesis to small values of Z, and so is the p-value, you can obtain it looking under the standard normal distribution for the probability of obtaining at most -0.82:

P(Z≤-0.82)= 0.206

Using the p-value approach:

If p-value ≤ α, reject the null hypothesis

If p-value > α, don't reject the null hypothesis

The decision is to not reject the null hypothesis.

Then at a level of 5%, you can conclude that the population proportion of gamers that prefer playing on consoles is at least 28%.

I hope this helps!

4 0
3 years ago
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