1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
spin [16.1K]
3 years ago
6

Find the sum of the roots of the quadratic x^2 + 7x - 13 = 0

Mathematics
1 answer:
Hoochie [10]3 years ago
6 0

Answer:

-7

Step-by-step explanation:

You use the quadratic formula of ax^{2} +bx+c = 0 to get:

a = 1

b = 7

c = -13

then you plug that into x= (-b ± √b²-4ac)/(2a) :

x= ( -7 ± √7²- 4(1)(-13) )/(2(1))

x=-\frac{7}{2} + \frac{\sqrt{101}}{2} \\\\x=-\frac{7}{2} - \frac{\sqrt{101}}{2}

The sum of these two x values turns out to be:

x=-\frac{7}{2} + \frac{\sqrt{101}}{2}+( -\frac{7}{2} - \frac{\sqrt{101}}{2} )= -\frac{14}{2} = 7

You might be interested in
What is the value of y?​
prohojiy [21]

Answer:

it is 108 because 180-72

8 0
3 years ago
Choose whether the expression is a result of multiplying
vladimir1956 [14]

Answer:

neither

Step-by-step explanation:

Take out 5 as a common factor. It will be easier to look at.

5(5c^2 + 11c + 6)

5(5C +6 )(c + 1 )

Now you can put the 5 inside.

(25c + 30)(c + 1) is one answer.

(5c + 6)(5c + 5) is another.

The answer is multiplying binomials. There is nothing that that is squared and the answers are not conjugates. They are two binomials multiplied together.

8 0
3 years ago
Anyone know the answer ?!? Let me know please !!!
Andru [333]

Answer:

25/35 = .71 = 71%

Step-by-step explanation:

3 0
2 years ago
What are the variables in the expression below?
N76 [4]

Answer:

pizza

Step-by-step explanation:

dough sauce cheese toppings ∞║║║║║║║║

3 0
3 years ago
Shuan rides his bike at a speed of 19 mph how far in miles is shuan travel in 25 minutes
irga5000 [103]

Answer:

7.92 miles   (aprox.)

Step-by-step explanation:

1 hour = 60 minutes

19mph = 19miles/hour = 19miles/60 minutes

Proportions:

19 miles ⇔ 60 minutes

W miles  ⇔ 25 minutes

W = 19*25/60

W = 7.92 miles     (aprox)

6 0
3 years ago
Other questions:
  • Round 75.64 to the nearest ten
    10·2 answers
  • Pls help!!!!! Thx and fast sry for rushing!!
    11·2 answers
  • P x 1/3 = 6<br> what is p?<br> 2<br> 3<br> 9<br> 18
    5·2 answers
  • 5/6 divided by 3????? Pls help
    11·2 answers
  • What is the measure of angle 3?
    15·1 answer
  • Bobby believes his video game scores are clustered
    9·2 answers
  • Rachel put $2200 into an account that pays 4.2% simple interest for 5 years.
    10·1 answer
  • What’s the answer to this question???????
    15·1 answer
  • a patio measures 8 ft by 12 ft by 3 inches. find the volume of the bricks; round to the nearest tenth, if necessary. if the dens
    13·1 answer
  • Simplify -121<br> O-111<br> O 11<br> O-11<br> O 11
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!