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4 years ago

I NEED HELP ASAP TELL ME THE ANSWERS

Mathematics

1 answer:

yulyashka [42]4 years ago

4 0

Answer:

11=-2

12=15

13=12.91$

Step-by-step explanation:

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HELP plZZZZZZZ<br> and THANK YOU

Artyom0805 [142]

$\huge \bf༆ Answer ༄$

Let's solve ~

Y - intercept of the line is the point where value of x is 0 [ where the line cuts y - axis ]

$\qquad \leadsto\sf \: (0 , 3)$

X - intercept of the line is at the point where value of y is 0

[ where the line cuts x - axis ]

$\qquad \leadsto\sf \: (1 , 0)$

3 0

2 years ago

Read 2 more answers

Use the rules of exponents to evaluate or simplify. Write without negative exponents 8-squr3 is the conjugate of 8+squar 3

NISA [10]

8 - sqrt(3) is indeed the conjugate of 8 + sqrt(3).

What are you asking here? You are to "evaluate or simplify" what?

5 0

4 years ago

PLS!! help just answer no download or links

mariarad [96]

Answer:

6.15 in squared

Step-by-step explanation:

Hope This Helps :b

3 0

3 years ago

Read 2 more answers

What is the intermediate step in the form (x + a)2 = b as a result of completing the

Eddi Din [679]

Answer:

(x + 7)^2 = 64

Step-by-step explanation:

x^2 + 23x – 19 = 9x - 4

x^2 + 23x - 9x = -4 + 19

x^2 + 14x = 15 = 0

Completing the square:

(x + 14/2)^2 - (14/2)^2 = 15

(x + 7)^2 - 49 = 15

(x + 7)^2 = 64

8 0

3 years ago

On a standard IQ test, the standard deviation is 15. How many random IQ scores must be obtained if we want to find the true popu

igor_vitrenko [27]

Answer:

We need at least 4238 scores.

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:

$\alpha = \frac{1-0.97}{2} = 0.015$

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 $1-0.015 = 0.985$ , so $z = 2.17$

Now, find the margin of error M

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

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

How many random IQ scores must be obtained if we want to find the true population mean (with an allowable error of 0.5) and we want 97 percent confidence in the results

We need at least n scores, in which N is found when $M = 0.5$ . So

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

$0.5 = 2.17*\frac{15}{\sqrt{n}}$

$0.5\sqrt{n} = 2.17*15$

$0.5\sqrt{n} = 32.55$

$\sqrt{n} = \frac{32.55}{0.5}$

$\sqrt{n} = 65.1$

$\sqrt{n}^{2} = (65.1)^{2}$

$n = 4238$

We need at least 4238 scores.

7 0

4 years ago