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
natulia [17]
3 years ago
15

Help please help me I need this

Mathematics
1 answer:
mixer [17]3 years ago
3 0

Answer:

\frac{5+-\sqrt{53} }{2}

Step-by-step explanation:

in the equation given these are the values:

a=1   b= -5     c= -7

if we plug this in the quadratic formula \frac{-(-5)+-\sqrt{(-5)^2-4(1)(-7)} }{2(1)}

this is simplified to \frac{5+-\sqrt{53} }{2}

hope this helped

You might be interested in
Solve and check 8-(6-8x) =4x+4
navik [9.2K]
Greetings!

"Solve and check 8-(6-8x)=4x+4"...

Solve for x<span>:
</span>8-(6-8x)=4x+4
Remove the Parenthesis.
8-6-8x=4x+4
Simplify.
2-8x=4x+4
Add -4 to both sides.
(2-8x)+(-4)=(4x+4)+(-4)
Simplify.
-2-8x=4x
Add 8x to both sides.
(-2-8x)+8x=(4x)+8x
Simplify.
-2=12x
Divide both sides by 12.
(-2)/12=(12x)/12
Simplify.
-0.166666667=x

The answer is: <em>x=-0.166666667

</em>Hope this helps.
<em></em>-Benjamin
7 0
3 years ago
What number do we divide by -9 to get 8?
Darya [45]

Answer:

-72 i notice you're having trouble message me and ill help you

7 0
4 years ago
Solve |t+4| &gt; 10
diamong [38]
For
|a|>b
assume
a>b and a<-b

|t+4|>10
assume
t+4>10 and t+4<-10
solve each
minus 4 both sides

t>6 and t<-14


A is answer

7 0
4 years ago
.Solve the system of equations. Use elimination
Elina [12.6K]

Answer:

a) (-9,3)

Step-by-step explanation:

   x + 2y = -3

- (x -    y = -12)

<u />

x + 2y = -3

<u>- x + y =  12</u>

       3y =  9

          y = 3

x - y = -12

x- 3 = -12

x= - 9

(-9, 3)

6 0
3 years ago
Find the area of a circle. use terms to pi. c=pi over 2. the answer is pi over 16. why?
FinnZ [79.3K]
C=2pi*r; circumference formula

a=pi*r^2; area formula

It says the circumference is pi/2; so undo that by using the circumference formula to solve for r(radius);

2pi*r=pi/2
pi crosses each other off, making 2r=1/2
(When something crosses itself out it becomes a 1)
2r=1/2
r=.25 (because 1/2 is 0.5, and 0.5 divided by 2 is .25)

Now use the r you have in the area formula.
a=pi*r^2
.25 squared is .0625

1 divided by .0625 is 16, so now you have
a=pi*.0625 this will get you 1/16th of pi, or pi divided by 16.

(1/16th if pi is the same as pi divided by 16)

.0625pi=pi/16
5 0
3 years ago
Other questions:
  • Find the number of trucks for 128 vehicles... table shown above
    8·1 answer
  • Samy recorded the number of different types of pets his friends have in the table shown below:
    7·1 answer
  • D-21.4=87.9 <br> Explain your answer
    5·1 answer
  • Olga flips 2 fair coins. What is the probability of obtaining a different result on each coin?
    10·2 answers
  • Classify each pair of angles as Complementary, Supplementary or neither.
    5·1 answer
  • Cameron is designing a calendar as a fund raising project for math class. The cost of printing is $500, plus $2.50 per calendar.
    13·1 answer
  • Georgians bank account has a current balance of -$25 .50 said she deposit under $20 into account each month how much money will
    7·1 answer
  • There was a total of 184 teachers and students at an archery lesson.
    9·1 answer
  • Max and Sharifa are both saving to buy the same model of DVD player, which costs $99, including tax. Max already has $31.00 and
    12·1 answer
  • Stacy recorded the number of minutes she used her
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!