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
Alinara [238K]
3 years ago
10

Use the quadratic formula to solve the equation X^2+9X+20=0

Mathematics
2 answers:
lions [1.4K]3 years ago
6 0

Answer:

x=-4

x=-5

Step-by-step explanation:

Stells [14]3 years ago
3 0

Answer:

-4 or -5

Step-by-step explanation:

Well, you have to first understand variables a, b, and c. A in this equation is 1, b is 9, and c is 20. Then you plug those into -b ± sqrt (b^2-4ac)/2a and find that the discriminant, or what is under the square root, is one. Your two roots will be -4 and -5.

You might be interested in
Jake and Seth put some money into their money boxes every week. The amount of money (y), in dollars, in their money boxes after
Maru [420]
1)  How many weeks will Jake and Seth be equal? set the equations equal to each other and solve for x:

5x + 85 = 20x + 40

45 = 15x

<u><em>x = 3 weeks</em></u>

2)  How much money will that be? plug x = 3 back into the equation to solve for y:

Jake:  5(3) + 85 = $100
Seth:  20(3) + 40 = $100

<u><em>answer is $100</em></u>
4 0
3 years ago
A college surveys local businesses about the importance of students as customers. The college chooses 150 businesses at
GenaCL600 [577]

The proportion of businesses who did not respond = 54.67%

Given : Total businesses = 150

Businesses responded = 68

Businesses did not respond =  150- 68 = 82

The proportion of businesses who did not respond =

82/150 x 100

54.67%

8 0
3 years ago
Explain what the variable represents in an addition or subtraction expression
Stels [109]
A varible represents the number u are looking for. 

Example: 
2x + 3x  
3 0
3 years ago
Whoever gets this correct first gets brainlest!!
nika2105 [10]

D. f(x)=4 (5/2)^x

Are really good tool for graphing problems is Demos.com

4 0
3 years ago
I will follow you please give me correct answer ​
Usimov [2.4K]

Answer:

y=1/3, x=4/9

y=8, 32/3

x=9, y=27/4

y=20, x=80/3

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Jazmine is painting picture frames. She uses 1 tube of red paint and 2 tubes of yellow paint for every 5 frames. How many tubes
    14·1 answer
  • Can you please help me with the problem in the image below?
    12·1 answer
  • Solve each quadratic equation by the square root method.<br> X^2+2x-3=0
    7·1 answer
  • Need help please :) thanks
    7·1 answer
  • Ind the distance between the two points. Round to the nearest tenth if necessary. (9, 12), (–2, 7)
    6·1 answer
  • Im thinking of a number. If I double my number and add the sum of my number and 2, the result if four more than my number what i
    5·2 answers
  • Please help this is due in 44 minutes!
    10·1 answer
  • 3+5 plz help will gibe brain
    10·2 answers
  • What is the surface area of this rectangular pyramid?
    11·1 answer
  • 83. Martina had $231. She spent 3/7 of her money on new
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!