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3 years ago

3x+2(4x-4)=3 I need help with this asappp

Mathematics

1 answer:

IceJOKER [234]3 years ago

5 0

Answer:

x=1

Step-by-step explanation:

3x+8x-8=3

11x=3+8

11x=11

x=11/11

x=1

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1.Is this figure a polygon<br> 2. If so what is the name of the polygon

irga5000 [103]

Answer:

yes, its a heptagon

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Just before a referendum on a school budget, a local newspaper polls 402 voters to predict whether the budget will pass. Suppos

Sliva [168]

Answer:

21.21%

Step-by-step explanation:

Assume that proportion of support follows normal distribution.For resulting in defeat the proportion of support should less than 0.5.Given that the proportion of support is p= 0.52.

Sample size(n)= 402

We know that standard deviation is given as

$\sigma = \sqrt {\dfrac {p(1-p)}{n}}$

Now by putting the values

$\sigma = \sqrt {\dfrac{0.52\times 0.48}{402}}$

σ=0.0249

Proportion of support follows normal distribution with mean is 0.52 and standard deviation is 0.0249

We know that $Z=\dfrac{\bar{X}-\mu }{\sigma }$

$Z=\dfrac{0.5-0.52 }{0.0249}$

Z= -0.80

So P(Z<-.80) =0.2118 from standard table.

So the probability of news paper to predict defeat is 21.21%

7 0

3 years ago

Find the area of a semi circle with a diameter of 28cm

Alexandra [31]

since it has a diameter of 28, then its radius must be half that or 14.

$\textit{area of a circle}\\\\ A=\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=14 \end{cases}\implies A=\pi (14)^2\implies A=196\pi ~\hfill \stackrel{\stackrel{semi-circle}{half~that}}{98\pi }$

8 0

2 years ago

Can someone help? I hate math so much lol I don’t understand

marishachu [46]

Answer:

±6

Step-by-step explanation:

Given the mathematical expression;

√36 < √42 < √49

But, √36 = 6 * 6 = 6²

√49 = 7 * 7 = 7²

Simplifying further, we would substitute the new values respectively;

±[6] < √42 < ±[7]

Therefore, evaluating √36 is equal to ±6.

8 0

3 years ago

Figure a is a scale image of figure b. what is the value of x? please answer asap!

emmainna [20.7K]

<em>Greetings from Brasil...</em>

According to the statement, one figure is scaled in relation to another, so we can apply similarity to polygons.....

BIG/small = BIG/small

small/BIG = small/BIG

12.5/10 = X/16

10/12.5 = 16/X

12.5/10 = X/16

10X = 12.5 · 16

X = 200/10

8 0

4 years ago