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3 years ago

Solve 4 + (-3) - 2 x (-6) A. -11 B. 12 C. -10 D. 13

Mathematics

1 answer:

Gennadij [26K]3 years ago

8 0

Answer:

Step-by-step explanation:

Using PEMDAS you start with multiplication first, so -2 multiplied by -6, which is positive 12. Then you go from left to right, so 4 +-3, or 4-3, which is 1. Then 1-12 is -11. So your final answer is A, -11.

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If f(x) = x square - 4x + 6, find f(1) - f(-1)

VikaD [51]

Answer:

- 8

Step-by-step explanation:

Evaluate f(1) and f(- 1) by substituting x = 1 and x = - 1 into f(x)

Given

f(x) = x² - 4x + 6, then

f(1) = 1² - 4(1) + 6 = 1 - 4 + 6 = 3

f(- 1) = (- 1)² - 4(- 1) + 6 = 1 + 4 + 6 = 11

Thus

f(1) - f(- 1) = 3 - 11 = - 8

8 0

4 years ago

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How many different twotwo-letter passwords can be formed from the letters

Anna [14]

Answer:

$70$

Step-by-step explanation:

GIVEN: two two-letter passwords can be formed from the letters A, B, C, D, E, F, G and H.

TO FIND: How many different two two-letter passwords can be formed if no repetition of letters is allowed.

SOLUTION:

Total number of different letters $=8$

for two two-letter passwords $4$ different are required.

Number of ways of selecting $4$ different letters from $8$ letters $=^8C_4$

$=\frac{8!}{4!4!}$

$=70$

Hence there are $70$ different two-letter passwords can be formed using $8$ letters.

5 0

4 years ago

Each of the statements contains a blunder. In each case, choose the statement that correctly explains the blunder. (a) "There is

Vikki [24]

Answer:

Correlation requires both variables to be quantitative.

Step-by-step explanation:

The correlation coefficient measures the strength of relationship between two quantitative variables. In the given scenario correlation between sex of American workers and their income is computed and indicated that there is a high correlation between them. The sex of American worker is a categorical variable or a qualitative variable while income of American worker is a quantitative variable. The correlation between a quantitative variable and a qualitative variable can't be computed. So, the statement explains the blunder in the given scenario is "Correlation requires both variables to be quantitative".

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4 years ago

A sample of 15 recent college graduates found that starting salaries for attorneys in New York City had a mean of $102,342 and a

cricket20 [7]

Answer:

The average salary of all recently graduated attorneys in New York City, 102,342 dollars.

Step-by-step explanation:

n = 15

Starting salaries for attorneys in New York City had a mean of $102,342

Standard deviation = $21,756

$\mu$ represents the mean of the population

We are given that salaries for attorneys in New York City had a mean of $102,342

So, Option B is true

The average salary of all recently graduated attorneys in New York City, 102,342 dollars.

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3 years ago

Write the following equation. The sum of four times a number, and 3, is equal to three times the number.

svetlana [45]

Answer: 4x+3=3x

Step-by-step explanation:

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3 years ago

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