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lubasha [3.4K]
3 years ago
6

I need 7,8,9 for brainlyest

Mathematics
2 answers:
frosja888 [35]3 years ago
5 0
Where is the questions at
Andrej [43]3 years ago
5 0

Answer:

We need to see the questions- but here ya go!

Step-by-step explanation:

7,8,9 :D

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Simplify -4(2x - 3) + 7 x – 1.​
valina [46]

Answer:

-x+11

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
If one figure is translated, rotated and dilated to create its image, the two figures will be __________ .
Vsevolod [243]
Similar is the answer because no matter the transformation done to the figure it’s always going to be similar to the image(after transformation figure) not necessarily congruent but similar
7 0
3 years ago
A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 5.2 on a placement test. What is
BigorU [14]

Answer:

29.5+/-1.11

= ( 28.39, 30.61)

Therefore, the 90% confidence interval (a,b) =( 28.39, 30.61)

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = 29.5

Standard deviation r = 5.2

Number of samples n = 59

Confidence interval = 90%

z-value (at 90% confidence) = 1.645

Substituting the values we have;

29.5+/-1.645(5.2/√59)

29.5+/-1.645(0.676982337100)

29.5+/-1.113635944529

29.5+/-1.11

= ( 28.39, 30.61)

Therefore, the 90% confidence interval (a,b) =( 28.39, 30.61)

4 0
3 years ago
If a polynomial function f(x) has roots 6 and square root of 5, what must also be a root of f(x)?
ivolga24 [154]

Answer:

-\sqrt{5}

Step-by-step explanation:

A root with square root or under root is only obtained when we take the square root of both sides. Remember that when we take a square root, there are two possible answers:

  • One answer with positive square root
  • One answer with negative square root

For example, for the equation:

x^{2}=3

If we take the square root of both sides, the answers will be:

x=\sqrt{3} \text{ or } x= -\sqrt{3}

Only getting one solution with square root is not possible. Solutions with square root always occur in pairs.

For given case, the roots are 6 and \sqrt{5}. Therefore, the 3rd root of the polynomial function f(x) had to be -\sqrt{5}

It seems you made error while writing option B, it should be - square root of 5.

4 0
3 years ago
Compound interest formula: alt="V (t) = P (1 + StartFraction r Over n EndFraction) Superscript n t"
Andrei [34K]

Answer:

first part is B, second part is 11 years

Step-by-step explanation:

edg

4 0
3 years ago
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