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borishaifa [10]
3 years ago
7

Estimating Mean SAT Math Score

Mathematics
1 answer:
allochka39001 [22]3 years ago
3 0

Answer:

(483.981 ; 504.019)

Step-by-step explanation:

Given :

σ = 100

Sample size, n = 661

xbar = 494

We use the Z distribution since we are working with the population standard deviation ;

C.I = xbar ± (Zcritical * σ/√n)

Zcritical at 99% = 2.576

C.I = 494 ± (2.576 * 100/√661)

C.I = 494 ± 10.019

Lower boundary = (494−10.019) = 483.981

Upper boundary = (494+10.019) = 504.019

C.I = (483.981 ; 504.019)

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#16 please answer!! thank you!!
lyudmila [28]

Answer:

boooobieeeesss

Step-by-step explanation:

booooobbbsss mmmmm + booooobs

3 0
3 years ago
8k - 6 = 10k + 6<br> No idea how to figure this out
kumpel [21]

8k - 6 = 10k + 6

K= -6

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    8*k-6-(10*k+6)=0

Step by step solution :

STEP

1

:

Pulling out like terms

1.1     Pull out like factors :

  -2k - 12  =   -2 • (k + 6)

Equation at the end of step

1

:

STEP

2

:

Equations which are never true:

2.1      Solve :    -2   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation:

2.2      Solve  :    k+6 = 0

Subtract  6  from both sides of the equation :

   Which gives k = -6

8 0
3 years ago
Read 2 more answers
What is the least common multiple (LMC) of 8 and 12?
IRINA_888 [86]
Hey There!

If i am doing this the least common multiple can either be 
2 or 4.
thus being
2, 4, 6, 8, 10, 12
Or
4, 8, 12.

Hope This Helps!!!
3 0
4 years ago
questionten times a number, x, is one-half the sum of the number and three. which answer represents this situation? 10x
nataly862011 [7]

The solution of the equation 20x = x + 3 will be 3 / 19. Then the correct option is A.

<h3>What is Algebra?</h3>

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

Making anything easier to accomplish or comprehend, as well as making it less difficult, is the definition of simplification.

Ten times a number, x, is one-half the sum of the number and three. Then the equation will be

10x = 1/2(x + 3)

Simplify the equation, then we have

20x = x + 3

19x = 3

x = 3 / 19

The solution of the equation 20x = x + 3 will be 3 / 19. Then the correct option is A.

The missing options are given below.

A. 10x = 1/2(x + 3)

B. 10x = 1/2x

C. 10x = 1/2x + 3

D. 10x = (x + 3)

More about the Algebra link is given below.

brainly.com/question/953809

#SPJ4

7 0
2 years ago
Write a system of inequalities using the given graph
ziro4ka [17]

For dark line

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  • (-1,-4)

Slope

  • m=-4-1/-1=5

Equation in point slope form

  • y-1=5x
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Put (0,0)

  • 0<1

As line is dark sign is ≤

The inequality

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For dashed line

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Equation in intercept form

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Put (0,0)

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Symbol is >

Inequality is

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7 0
2 years ago
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