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2 years ago

Can someone please help me

Mathematics

2 answers:

frez [133]2 years ago

6 0

Of course

x-5.6=4.4

x=5.6+4.4

x=10

dangina [55]2 years ago

5 0

Answer: x=10.0 or just 10

Step-by-step explanation: 4.4=x-5.6

+5.6 +5.6

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

10.0=x

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Evaluate 2(x - 4) + 3x - x2 for x = 2.<br> O A. -6<br> O B. -2<br> O C. 6<br> O D. 2

Olenka [21]

Answer:

B. -2

Step-by-step explanation:

2(x - 4) + 3x - x2

2(2 - 4) + 3(2) - (2)2

2(-2) + 6 - 4

-4 + 6 - 4

-8 + 6

-2

8 0

3 years ago

A fast food restaurant executive wishes to know how many fast food meals teenagers eat each week. They want to construct a 99% c

Lana71 [14]

Answer:

The minimum sample size required to create the specified confidence interval is 2229.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What is the minimum sample size required to create the specified confidence interval

This is n when $M = 0.06, \sigma = 1.1$

$0.06 = 2.575*\frac{1.1}{\sqrt{n}}$

$0.06\sqrt{n} = 2.575*1.1$

$\sqrt{n} = \frac{2.575*1.1}{0.06}$

$(\sqrt{n})^{2} = (\frac{2.575*1.1}{0.06})^{2}$

$n = 2228.6$

Rounding up

The minimum sample size required to create the specified confidence interval is 2229.

7 0

2 years ago

Factor completely 3x2 − 11x 8. (x 4)(3x − 2) (x − 2)(3x − 4) (x 1)(3x − 8) (x − 1)(3x − 8).

earnstyle [38]

The factors of the equation $3x^{2} -11x+8$ will be $(3x-8)(x-1)$

<h3>What will be the factors of the given equation?</h3>

When we split the equation into two groups we will get

$3x^{2} -3x-8x+8$

$3x(x-1)-8(x-1)$

Now taking (x-1) common

$(3x-8)(x-1)$

Thus the factors of the equation $3x^{2} -11x+8$ will be $(3x-8)(x-1)$

To know more about the factors of quadratic equation follow

brainly.com/question/1214333

3 0

1 year ago

Please help me answer 5 and 6.

Kryger [21]

For number 5 you are just multiplying by 4.5

5 0

3 years ago

42 deliveries in 3 hours = deliveries per hour

DochEvi [55]

Answer:

14 deliveries per hour

Step-by-step explanation:

42/3

The person makes 14 deliveries per hour

8 0

2 years ago

Read 2 more answers