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
vlabodo [156]
3 years ago
6

Solve the equation for x, where x is a real number (5 points): -2x^2 + 7x + 7 = 6

Mathematics
2 answers:
Artemon [7]3 years ago
8 0
Start by doing a subtraction of 6 to both sides so that the equation becomes -2x^2 + 7x + 1 = 0.
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
                             x = [ -b ± √(b^2 - 4ac) ] / (2a)
                             x = [ -7 ± √((7)^2 - 4(-2)(1)) ] / ( 2(-2) )
                             x = [-7 ± √(49 - (-8) ) ] / ( -4 )
                             x = [-7 ± √(57) ] / ( -4)
                             x = [-7 ± sqrt(57) ] / ( -4 )
                             x = 7/4 ± -sqrt(57)/4
The answers are 7/4 + sqrt(57)/4 and 7/4 - sqrt(57)/4.
Sever21 [200]3 years ago
7 0
Yeah he's right the first answer
You might be interested in
I need help please!!!
e-lub [12.9K]
There is no distinct pattern, the scatter plot would be up down and spread apart, nothing really correlated.

3 0
2 years ago
A grain of sand has a diameter that is 2 mm long. Under a magnifying glass, it looks 20 mm long. What magnification was used?​
nikklg [1K]

Answer:

Times 10 magnify

Step-by-step explanation:

4 0
2 years ago
Hi!!!<br>Calcula los divisores de cada número :<br>8, 12 ,24 , 25 , 28, <br>please . _ .​
Kamila [148]
I think that it’s 23
6 0
3 years ago
A television game has 6 shows doors, of which the contests must pick 2. behind two of the doors are expensive cars, and behind t
Katyanochek1 [597]
The answer to this question:
One car probability 82/120
No car probability = 24/120
At least one car probability= 96/120

I will focus answering the 3 doors probability since the 2nd door problem is solved in the previous problem. (brainly.com/question/5761449)

No car condition
1. 1st door consolation, 2nd door consolation=, 3rd door consolation= 4/6 * 3/5 * 2/4= 24/120
This was also can be found by: (4!/1!)/ (6!/3!) = 24/120

(At least one car probability)  is the opposite of (no car probability) In this case, the easier way is 
100% - (no car probability) = 120/120 - 24/120= 96/120

One car probability is (At least one car probability) - (2 car probability). It will be easier to count the 2 car probability and subtract the (At least one car probability) 
Two car condition:
1. 1st door car, 2nd door car, 3rd door consolation = 2/6 * 1/5 * 4/4 =8/ 120
2.1st door car, 2nd door consolation, 3rd door car =2/6 * 4/5 * 1/4 = 8/120
3. 1st door consolation, 2nd door car, 3rd door car= 4/6 * 2/5 * 1/4= 8/120
The total probability will be 8/120+ 8/120 + /120= 24/120
This was also can be found by: (2!) (4!/2!)/ (6!/3!) = 24/120

One car probability =  (At least one car probability) - (2 car probability)= 96/120-24/120= 82/120
3 0
3 years ago
(MUST SHOW WORKING)
myrzilka [38]
First of all, keep in mind :
m --> cm = times by 100
cm --> mm = times by 10
mm --> cm = divide by 10
cm --> m = divide by 100

so we know that a square has 4 equal sides and to find the area of a square we do base*height. now these two numbers on the base and height are the same so we're basically squaring them to get the area of 81. therefore, we do the reverse so square root 81 and we get the answer 9cm

now let's convert 9cm to mm
= 9*10 = 90
area in mm = 90mm

now let's convert 9cm to meters
= 9/100=0.09
area in m = 0.09m

and finally, we already worked out the area in cm
= 9cm

hope this helped :)


3 0
3 years ago
Other questions:
  • License plates on cars are composed of up to 7 characters. The characters can either be a digit (0,1,...,9) or an uppercase lett
    7·1 answer
  • Find the missing measurements of the right triangle
    10·2 answers
  • When laid flat, a round parachute has a radius of 6 meters. What is the parachute's diameter?
    6·2 answers
  • What is a valedictorian?
    15·2 answers
  • I made a z00m join if you want<br> Meeting ID 434-341-8872<br> Password 5nAqMW
    13·2 answers
  • Pls hurry!!!!!!! What value(s) of x will make x^2 = 100 true?
    7·1 answer
  • 1. What is the difference between<br> checking account and a savings <br> account?<br> a
    12·2 answers
  • List the sides and angles of △ABC in order from smallest to largest.
    10·2 answers
  • Solve for x<br><br> 7/8 of x is 14
    8·2 answers
  • <img src="https://tex.z-dn.net/?f=%20-%2010a%20-%209n%20%2B%2016%20-%2030%20%2B%203n%20%2B%2015a%20%2B%2050%20%2B%20a%20%3D%20"
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!