All categories

2 years ago

il a positive number decreased by 5, then it is 84 times of its reciprocal. Find the number? op 10, 11, 12, 13

Mathematics

1 answer:

Alenkasestr [34]2 years ago

6 0

Answer:

x = 12

Step-by-step explanation:

x - 5 = 84/x

x² - 5x = 84

x² - 5x - 84 = 0

x = (5 ±√(5² - 4(1)(-84))) / 2

x = (5 ± 19) / 2

x = -7 ignore

x = 12

You might be interested in

Emma's final grade in her math class is the average (mean) of her 5 chapter tests she took throughout the year. If she received

NikAS [45]

Answer:

Step-by-step explanation:

The mean (or average) of a set of numbers can be found with the following formula:

$Mean = \frac{A_{1} + A_{2} + ... + A_{N}}{N}$

For this problem, we have five numbers, so we add them together and divide by 5:

$Mean = \frac{92 + 85 + 78 + 97 + 88}{5}$

$Mean = \frac{440}{5}$

$Mean = 88$

8 0

3 years ago

Read 2 more answers

4.72n - 0.1 = 8 + 0.67n

levacccp [35]

4.72n - 0.1 = 8 + 0.67n

4.72n - 0.67n = 8 + 0.1

4.05n = 8.1

4.05n/4.05 = 8.1/4.05

n = 2

5 0

3 years ago

What is the area? Write your answer as a fraction or as a whole or mixed number.

photoshop1234 [79]

Answer:

81 or 20 1/4

Step-by-step explanation:

im not sure sorry

7 0

3 years ago

Read 2 more answers

What is the answer to:<br><br>3(3x-4)-2(2x-1)

Tamiku [17]

Answer:

= 5x -10

Step-by-step explanation:

=(3)(3x)+(3)(−4)+(−2)(2x)+(−2)(−1)

=9x+−12+−4x+2

Combine Like Terms:

=9x+−12+−4x+2

=(9x+−4x)+(−12+2)

=5x+−10

3 0

3 years ago

Read 2 more answers

Please give me correct answer

babunello [35]

Answer:

36 = 17+19 ---> They are twin primes and their sum is 36

84 = 41+43 ---> They are twin Primes and sum is 84

120 = 59+61 ---> They also are twin primes and their sum is 120

144 = 71+73 ---> They are also twin primes and the sum is 144

6 0

3 years ago

il a positive number decreased by 5, then it is 84 times of its reciprocal. Find the number? op 10, 11, 12, 13​

il a positive number decreased by 5, then it is 84 times of its reciprocal. Find the number? op 10, 11, 12, 13