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3 years ago

Help on picture 20 points

Mathematics

1 answer:

Flauer [41]3 years ago

3 0

Answer:

4 to 7 and 8 to 14

Step-by-step explanation:

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(x - 1)2 = 4 how do i do this

Gnoma [55]

Answer:

x = 3

Step-by-step explanation:

(x - 1)2 = 4

how to get this solved is very simple.

first step to apply is the BODMAS RULE

B..................... bracket

O..................... of

D.....................Division

M.................... multiplication

A..................... addition

S.................... Subtraction

so (x - 1)2 = 4

we have,

2x - 2 = 4 ( by opening the bracket)

collect the like terms

2x = 4+2

divide both sides by 2

2x/2 = 6/2

x = 3

to check if your answer is correct put the value of x = 3 into the question and see if the right hand side will equal to the left handside

(x - 1)2 = 4

(3-1)2=4

2(2)=4

4=4.............................. proved

8 0

4 years ago

Slove the equation r+ 3 = (r - 5) explain step by step please

grigory [225]

Answer:

no solutions

Step-by-step explanation:

Solving

Step 1: Subtract 3 from both sides.

$r+3-r=r-5-r$
$3=-5$

Step 2: Subtract 3 from both sides.

$3-3=-5-3$
$0\neq -8$

Therefore, there are no solutions to this equation.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

4 0

2 years ago

Read 2 more answers

Find the exact value of sec 795

sladkih [1.3K]

Evaluate the trigonometric expression using sum and difference formulas.

3 0

3 years ago

Read 2 more answers

In a survey of 200 residents, 75 said they support the proposed town budget. If there are 10,000 total residents, about how many

Archy [21]

If 75 out of 200 people support the town budget than 3,750 out of 10,000 support it

7 0

3 years ago

g "They hired an analyst who collected a random sample of 40,361 Game of Thrones fans, and found that 8,337 of those fans said t

Viktor [21]

Answer:

The lower bound for a 90% confidence interval is 0.2033.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 40361, \pi = \frac{8337}{40361} = 0.2066$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2066 - 1.645\sqrt{\frac{0.2066*0.7934}{40361}} = 0.2033$

The lower bound for a 90% confidence interval is 0.2033.

6 0

3 years ago