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3 years ago

Four times the sum of a number and -3 is 4 more than twice the number. Write and solve an equation to find the number.

Mathematics

1 answer:

Sindrei [870]3 years ago

7 0

Let the unknown number be x.

4*(x + (-3)) = 4 + 2x

4x -12 = 4 + 2x

2x = 16

x = 8

Hence, the number is 8.

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If for a particular one-to-one function f(2) = 13, what are the corresponding input and output

maks197457 [2]

Answer:

$f^{-1}(13) = 2$ .

Step-by-step explanation:

For function $f$ , the notation $f(2) = 13$ means that when the input to the function is $2$ , the output would be $13$ .

The inverse function of a one-to-one function $f$ is commonly denoted as $\!f^{-1}$ .

The inverse function undoes the action of the original function. In this question, $f$ maps $2$ to $13$ . Thus, $f^{-1}$ would need to map $13\!$ back to $2\!$ . Therefore, $f^{-1}(13) = 2$ should be the corresponding input and output values.

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2 years ago

Which of the following is the correct graph of the liners equation y+2=1\5 (x-1

Rom4ik [11]

There are no options

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3 years ago

I need help on this. I've no idea about this. Please help me...

Mashcka [7]

Answer:

Answers are below.

Step-by-step explanation:

Hope this helps:)

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2 years ago

What is the first quartile, Q1, of the following distribution?

Nostrana [21]

Answer:

I would go with C only because you have the find the median of the lower half of the data set This means that about 25% of the numbers in the data set lie below Q1 and about 75% lie above Q1.

Step-by-step explanation:

Lower quartile (xL): 26.5

Median (xm): 37

Upper quartile (xU): 44.5

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3 years ago

To use an automated teller machine at a certain bank, you must enter a 3-digit code, using the digits 1 dash 9. How many 3-d

3241004551 [841]

Answer:

729 , 3- digit codes are possible

Step-by-step explanation:

To use an automated teller machine at a certain bank, you must enter a 3-digit code, using the digits 1 dash 9.

We need a 3 digit code using digits 1 to 9

so total of 9 digits are used

also repetition of digits are permitted

In a 3 digit code, first digit can be any number from 0 to 9

so 9 possible numbers for first digit.

since repetition is allowed so second and third digit also have any number between 0 to 9

3 digit code

------ , ------- , --------

9 possibilities for each place

---9--- , ----9--- , ----9----

9 *9 *9 = 729

so 729 , 3- digit codes are possible

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3 years ago