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4 years ago

Which number doesn't belong?Why?3x-3- 3x?- 5x

Mathematics

2 answers:

Aliun [14]4 years ago

7 0

Answer:

-3 does not belong because it is not an algebraic expression unlike the others.

VLD [36.1K]4 years ago

5 0

-3 dose not belong because it is an algebraic expression and you can also tell cause it ha no X

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Scores on the Wechsler Adult Intelligence Scale (WAIS) are approximately Normal with mean 105 and standard deviation 16. People

erik [133]

Answer:

2.5% of adults are intellectually disabled by this criterion

Step-by-step explanation:

The Empirical Rule(68-95-99.7 rule) states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 105

Standard deviation = 16

The normal distribution is symmetric, which means that 50% of the measures are below the mean and 50% are above.

What percent of adults are intellectually disabled by this criterion

Below 73

73 = 105 - 2*16

So 73 is 2 standard deviations below the mean.

Of the 50% of the measures that are below the mean, 95% are within 2 standard deviations of the mean, that is, between 73 and 105. The other 100 - 95% = 5% are below 73. So

0.05*0.5 = 0.025

0.025*100 = 2.5%

2.5% of adults are intellectually disabled by this criterion

7 0

3 years ago

A car dealership has 240 cars in the parking lot and 17.5% of them are red. Of the other 6 colors in the lot each color has the

SIZIF [17.4K]

Answer:
33

Explanation:
number of red cars
17.5
%
×
240
=
42

number of cars of other colors
=
240
−
42
=
198

number of black cars
1
6
×
198
=
33

3 0

4 years ago

Solve the division problem: 10)430 O A. 40 B. 43 C. 400 D. 403

Paha777 [63]

Answer is option B.43

430÷ 10 = 43

By : Modern Einstein

7 0

2 years ago

$2,500 {(1/.005) - [1/.005(1.005)12 ×25]}

Afina-wow [57]

Answer:

-12771250

Step-by-step explanation:

We want to evaluate;

$2500( \frac{1}{0.005} - ( \frac{1}{0.005} \times 1.005 ^{12} \times 25)$

We expand to get;

$2500 \times \frac{1}{0.005} - 2500( \frac{1}{0.005} \times 1.005 ^{12} \times 25)$

$500000 - 500000 \times 1.0617 \times 25$

We multiply to get;

$500000 - 13271250$

We now subtract to get :

$= - 12771250$

6 0

3 years ago

What is the remainder when (3x4 + 2x3 – x2 + 2x – 14) ÷ (x + 2) ?

Tpy6a [65]

Answer:

Remainder: 10

Step-by-step explanation:

Given: $(3x^4+2x^3-x^2+2x-14)\div (x+2)$

We need to find the remainder of the division polynomial.

Using synthetic division:

-2 | 3 2 -1 2 -14 |

-6 8 -14 24

3 -4 7 -12 10

Please see the attachment for steps.

At last we get a number 10.

Therefore, 10 is remainder of division.

8 0

3 years ago

Read 2 more answers

Which number doesn't belong?Why?3x-3- 3x?- 5x​

Which number doesn't belong?Why?3x-3- 3x?- 5x