All categories

3 years ago

Find the sum. 2x^2 +26x+ 156=0

Mathematics

2 answers:

kykrilka [37]3 years ago

6 0

It can not be found it is X e R

Mila [183]3 years ago

5 0

Answer:

-13

Step-by-step explanation:

2x²+26x+156=0

x²+13x+78=0

x²+13x=-78

x²+13x+169/4=-143/4

(x+13/2)²=-143/4

x+13/2=(i√143)/2 or x+13/2=-(i√143)/2

x=(i√143)/2-13/2 or x=-(i√143)/2-13/2

(i√143)/2-13/2+(-(i√143)/2)-13/2=(i√143-13-i√143-13)/2=-26/2=-13

You might be interested in

The wholesale price for a shirt is $5.50. A certain department store marks up the wholesale price by 40%. Find the price of the

Kazeer [188]

Answer:

$7.7

Step-by-step explanation:

Hello, I can help you with this

you can solve this by using a simple rule of three.

Step 1

define

if the wholesale price for a shirt is $5.50,it is 100 percent

$5.50⇔100%

the new price(x) is 40% more than the original, it means 140%

x ⇔ 140%

the relation is

$\frac{5.5}{100}= \frac{x}{140}\\$

Step 2

solve for x(isolate x)

$\frac{5.5}{100}= \frac{x}{140}\\x=\frac{5.5*140}{100}\\x=7.7$

the price of the shirt in the department store is $7.7

Have a nice day.

7 0

3 years ago

Y = x + 5<br> 2x + y = 17

larisa [96]

Answer:

y = x + 5: x=y−5

2x + y = 17 : x=-1/2y+17/2

Step-by-step explanation:

I do not exactly know what you were asking but I just answered the questions, if that is not what you were looking for tell me so I can try and edit my answer

8 0

3 years ago

Which equation is the result of subtracting the second equation from the first?

rewona [7]

Answer:

the answer is

-x-8y=8

or, x + 8y= -8

Step-by-step explanation:

4x - 6y = 13 - (5x + 2y = 5)

or, 4x - 6y = 13

- 5x - 2y = -5

-------------------------

- x - 8y = 8

5 0

3 years ago

What is the slope of a line that is perpendicular to the graph of<br> y= 5x + 5?

AVprozaik [17]

-5/1 is the slope so the answer is -5 because you pick 2 points and use point slope formula or
y1-y2/x1-x2

3 0

3 years ago

Alisha asked 120 students what kind of pet they like the most. Exactly 45% of the students said they liked dogs best. What was t

qwelly [4]

The answer would be 54 students liked dogs the best.

6 0

3 years ago