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
inessss [21]
3 years ago
6

If x=-7 is a root of the equation x^2+kx+49=0, then k=​

Mathematics
1 answer:
aleksley [76]3 years ago
8 0

Answer:

k=14

Step-by-step explanation:

Given:

x^{2}+kx+49 = 0

x = -7

Substitution can be used to find the value of k:

(-7)^{2}+(-7)k+49 = 0

49-7k+49 = 0

98 -7k = 0

k = 14

Hope this helps :)

You might be interested in
Calculate.<br> 1) 4 x (3 divided by 8 + 1)
grin007 [14]
4(3/(8+1) = 4(3/9) = 12/9 = 4/3

4((3/8)+1) = 4(11/8) = 44/8 = 11/2

just depends on which way the equation is written
5 0
3 years ago
A right cylinder ice cream cone has 600 cubic centimeters of ice cream, what is the radius of the cone of the height is 15 centi
choli [55]
The formula for volume is V=Bh where  B is the area of the base. 
plug in what they have given you:
600=B(15) you can divide both sides by 15

40=B    We know that a cylinder's base is a circle so we can use the area f                           formula for a circle to solve for the radius.
40 = pi(r)^2   divide both sides by pi to get the r^2 alone
40/pi=r^2     square root both sides to get rid of the square
you should get
r=3.5 approximately



7 0
3 years ago
It took Everly 55 minutes to run a 10-kilometer race last weekend if you know that 1 kilometer equals 0.621 mile how many minute
ikadub [295]
55 min/10 km=5.5 min/km

5.5 min/km x 1 km/.621 mile= 5.5/.621=8.86 min/mile

The answer is D.
3 0
3 years ago
What are the solutions to the equation? x2(x+2)(x+6)=0 Enter your answers in the boxes. x = or x = or x =
Talja [164]

x^2(x+2)(x+6)=0\\\\x^2=0 \vee x+2=0 \vee x+6=0\\\\x=0 \vee x=-2 \vee x=-6

5 0
2 years ago
Read 2 more answers
Solve for x.<br> logo(x-2) + log(x + 3) = 2
amid [387]

Answer:

x=-1-5√17/2

Step-by-step explanation:

logo((x-2)(x+2))=2

logo(x²+3x-2x-6)=2

x²+3x-2x-6=10²

x²+x-6=100

x²+x-106=0

x=-1+5√17/2

5 0
2 years ago
Other questions:
  • How do you write an equation of a line in standard form if you have two points?
    12·1 answer
  • phillip watched a beach volleyball game from 1:45 pm to 2:00pm how many degrees did the minute hand turn?
    6·1 answer
  • <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B3%7D%20%20-%20%20%5Cfrac%7B4%7D%7B10%7D%20%20%3D%20" id="TexFormula1" titl
    8·1 answer
  • A SOLUTION CONTAINS 60% WATER, 15% BLEACH AND THE
    15·1 answer
  • Interest.
    6·1 answer
  • Classify abc by its angles if m
    7·1 answer
  • Let f be a functions of degree 4 whose coefficients are real numbers: two of its zeros are - 3 and 4 - i. Explain why one of the
    14·1 answer
  • If <img src="https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B7%7D%20x%20%2B%5Cfrac%7B1%7D%7B3%7D%20y%3D4" id="TexFormula1" title="\frac
    13·2 answers
  • Z-16z=15 what is z please
    5·2 answers
  • Java 1
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!