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
Artist 52 [7]
3 years ago
6

2) Dada a equação x2 – 4x – 12, faça o que se pede.

Mathematics
1 answer:
alexandr1967 [171]3 years ago
4 0

Answer:

a) x1 = 6 and x2 = -2

b) -2

Step-by-step explanation:

a)

To find the roots of the quadratic equation, we can use the Bhaskara's formula:

Delta = b^2 - 4ac

Delta = (-4)^2 - 4*1*(-12) = 64

sqrt(Delta) = 8

x1 = (-b + sqrt(Delta)) / 2a

x1 = (4 + 8) / 2

x1 = 6

x2 = (-b - sqrt(Delta)) / 2a

x2 = (4 - 8) / 2

x2 = -2

b)

The roots are 6 and -2, so the smaller root is -2

You might be interested in
A coin is tossed. If head appears, A spinner that can land on any number from 1 to 4 is spun. if tales appears a second coin is
kramer
The answer is c because if head appears and the spinner is spun with 1 - 4 on it then you can get either h1, h2, h3 or h4 and if tales appears and another coin is tossed you can get either th or tt
5 0
3 years ago
Find the sum 6 1/4 + 7 2/3
ki77a [65]

Answer:

13 11/12.

Step-by-step explanation:

First, we multiply 1/4 and 2/3 with it's least common denominator, 12. Now, we have 6 3/12 and 7 8/12. We now add this together to get the sum of 13 11/12.

7 0
2 years ago
Read 2 more answers
Select ALL the correct answers.
DaniilM [7]
Be:
Number of hours: n

<span>The cost of renting a bike for the first hour is $7:
n=1→f(n)=f(1)=$7

</span>He is charged $2.50 for every additional hour of renting the bike:
f(n)=f(n-1)+2.50, for <span>n ≥ 2
</span>
f(1)=7; f(n)=f(n-1)+2.50, for <span>n ≥ 2 (sixth option)
</span>
f(n)=f(1)+2.50(n-1)
f(n)=7+2.50(n-1)
f(n)=7+2.50n-2.50
f(n)=2.50n+4.50 (fifth option)

Answers:
Fifth option: f(n)=2.50n+4.50, and
Sixth option: f(1)=7; f(n)=f(n-1)+2.50, for <span>n ≥ 2</span>
7 0
3 years ago
What is b’c the length of bc after dilation? What is the measure of
Anastasy [175]

Answer:

C

Step-by-step explanation:

the angle will always stay the same, it won't change

but if the dialation is 1/2, then that means that the sides will decrease in size compared to the original length,

(just divide by 2) on each side length to get the answer

4 0
3 years ago
ASAP! what numbers round to 756,000 using 2,5,5,8,6, and 2?
ioda
655,822


Please give brainliest
5 0
3 years ago
Other questions:
  • The measures of two angles of a triangle are 61 and 84 degrees. Find the measure of the third angle.
    15·2 answers
  • Jarvis left out a statement from the proof shown.which statement is best explained by the corresponding angles postulate
    15·2 answers
  • Which equation represents a linear function that has a slope of Four-fifths and a y-intercept of –6?
    10·2 answers
  • Which of the following is written as a radical function
    15·1 answer
  • 3.1 x 10^-4 x 8.5 x 10^-2
    6·2 answers
  • What is the value of x in the equation 4 3/10-(2 2/5x+5 1/2) = 1/2( -3 3/5x +1 1/5)
    13·1 answer
  • Merideths brother, miles, is 3 years younger than twice her age. The sum of their ages is 24. Create an equation to determine th
    13·1 answer
  • What do we use to represent a value that<br> we don't know?
    9·1 answer
  • PLEASE HELP ME WITH BOTH MATH QUESTIONS ASAP!!!!!!!!!
    6·2 answers
  • Please help me this is for an exam <br><br> What is the polynomial function in factored form?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!