To work this out, we must use the balancing method - whatever we do to one side, we do exactly the same to the other

     -7 = e/3 + 14
(-14)            (-14)
-7 - 14 = -21

-21 = e/3
(x3)   (x3)
-21 x 3 = -63
-63 = e

e = -63

8 0

3 years ago

Read 2 more answers

The sum of a number and its reciprocal is 5/2 Find the number and its reciprocal.

sergiy2304 [10]

Answer:

Step-by-step explanation:

Let the number be 'x'

Reciprocal = $\frac{1}{x}$

$x+\frac{1}{x}=\frac{5}{2}\\\\\frac{x*x}{1*x}+\frac{1}{x}=\frac{5}{2}\\\\\frac{x^{2}+1}{x}=\frac{5}{2}$

Cross multiply

(x² + 1) *2 = 5*x

2x² + 2 = 5x

2x² - 5x + 2 =0

Factorize the equation,

Sum = -5

Product = 4

Factors = -1 , -4

2x² - x - 4x + 2 = 0

x(2x - 1) - 2(2x - 1) = 0

(2x -1 )(x - 2) = 0

2x - 1 = 0 ; x -2 = 0

2x =1 ; x = 2

x = 1/2

Number = 2 , and its reciprocal = 1/2

6 0

3 years ago

2. Convert 9% to a fraction and a decimal.

Furkat [3]

Answer:

0.09 decimal 9/100 fraction

Step-by-step explanation:

4 0

3 years ago

How far away would you need to place the ladder

hammer [34]

Answer:

Step-by-step explanation:

far away

8 0

3 years ago

Read 2 more answers