All categories

3 years ago

Solve -2x - 5 = 4 for x.

Mathematics

2 answers:

MrRa [10]3 years ago

7 0

Step-by-step explanation:

-2x - 5 = 4

-2x = 9

x= -4.5

hope it helps

joja [24]3 years ago

6 0

Answer:

-2x - 5 = 4

-2x = 4 - - 5

-2x = 9

x= 9/2

x = 4.5

<h2>I HOPE IT IS HELPFUL</h2>

You might be interested in

1) - (-2 - 5x)

olya-2409 [2.1K]

Assuming that we are solving for x when each equation is equal to zero, the solutions are:

1) -.4
2) 1/3
3) 2
4) 7/3
5) -4

7 0

2 years ago

solve the equation by completing the square. x^2 -6x -21=0 if the solution is not a real number enter no solution (ANSWER -2.48

Alexus [3.1K]

Answer:

see explanation

Step-by-step explanation:

given x² - 6x - 21 = 0 ( add 21 to both sides )

x² - 6x = 21

to complete the square

• add ( half the coefficient of the x-term)² to both sides

x² + 2 (- 3)x +9 = 21 + 9

(x - 3)² = 30 ( take the square root of both sides )

x - 3 = ± $\sqrt{30}$ ( add 3 to both sides )

x = 3 ± $\sqrt{30}$

x = 3 - $\sqrt{30}$ = - 2.48 ( to 2 dec. places ) or

x = 3 + $\sqrt{30}$ = 8.48 ( to 2 dec. places )

3 0

2 years ago

If TRAP is an isosceles trapezoid what is the value of x

rewona [7]

Answer:

Step-by-step explanation:

In an isosceles trapezoid any lower base angle is supplementary to any upper base angle, thus

6x + 2x + 4 = 180, that is

8x + 4 = 180 ( subtract 4 from both sides )

8x = 176 ( divide both sides by 8 )

x = 22 → B

4 0

3 years ago

Use the method of dividing prime factors to find the greatest common factor of 16, 120, and 216.

lawyer [7]

I hope this helps you

4 0

3 years ago

Solve for b 2(-2b+3)=9

Alexxx [7]

Answer:

b=-3/4 or b=-0.75

Step-by-step explanation:

$2(-2b+3)=9$

$2b+3=\cfrac{9}{2}$

$-2b=\cfrac{9}{3} -3$

$-2b=\cfrac{3}{2}$

$b=-\cfrac{\frac{3}{2} }{2}$

$b=-\cfrac{3}{2\times 2}$

$b=-\cfrac{3}{4}$

Hope it helps! :)

7 0

2 years ago