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
Svetradugi [14.3K]
2 years ago
6

Solve x2 − 10x = −13.

Mathematics
1 answer:
aev [14]2 years ago
6 0

Answer:

B

Step-by-step explanation:

First, let's rearrange the given equation into something more recognizable. If we add 13 to both sides, we now have the polynomial x^{2}-10x+13. We can now use the quadratic formula to solve.

Remember that the quadratic formula is

\frac{-b+/-\sqrt{b^{2}-4ac } }{2a}

Substitute the numbers from the equation into the formula.

\frac{-(-10)+/-\sqrt{(-10)^{2}-4(1)(13) } }{2(1)}

Simplify:

\frac{10+/-\sqrt{100-52} }{2}

\frac{10+/-\sqrt{48} }{2}

Here, I'm going to assume that there was a mistype in option B because if we divide out the 2 we end up with 5+/-\sqrt{48}.

Hope this helps!

You might be interested in
Calculate the sum of the multiples of 4 from 0 to 1000
allochka39001 [22]

Answer:

sum is 125,500

sum in summation notation is \sum\limits_{n=0}^n a+nd= (2a+(n-1)d)n/2

Step-by-step explanation:

This problem can be solved using concept of arithmetic progression.

The sum of n term terms in arithmetic progression is given by

sum = (2a+(n-1)d)n/2

where

a is the first term

d is the common difference of arithmetic progression

_____________________________________________________

in the problem

series is multiple of 4 starting from 4 ending at 1000

so series will look like

series: 0,4,8,12,16..................1000

a is first term so

here a is 0

lets find d the common difference

common difference is given by nth term - (n-1)th term

lets take nth term as 8

so (n-1)th term = 4

Thus,

d = 8-4 = 4

d  can also be seen 4 intuitively as series is multiple of four.

_____________________________________________

let calculate value of n

we have last term as 1000

Nth term can be described

Nth term = 0+(n-1)d

1000 =   (n-1)4

=> 1000 = 4n -4

=> 1000 + 4= 4n

=> n = 1004/4 = 251

_____________________________________

now we have

n = 1000

a = 0

d = 4

so we can calculate sum of the series by using formula given above

sum = (2a+(n-1)d)n/2

       = (2*0 + (251-1)4)251/2

       = (250*4)251/2

     = 1000*251/2 = 500*251 = 125,500

Thus, sum is 125,500

sum in summation notation is \sum\limits_{n=0}^n a+nd= (2a+(n-1)d)n/2

3 0
3 years ago
The center is (0, -3.2) and the radius is 2.2.
Radda [10]

Answer:

x^{2} +(y+3.2)^{2} =2.2^{2}

Step-by-step explanation:

(x-h)^{2} +(y-k)^{2} =r^{2}

The center is (h, k)

r is the radius

4 0
3 years ago
Xavier spent less than 2\5 of an hour walking home from school. Which fraction is less than 2\5? A5\7 B3\4 C5\10 D2\9
MAVERICK [17]
2/9 is less than 2/5 because since the denominator is larger, the pieces are smaller. (Numerator)
7 0
3 years ago
Read 2 more answers
HHHHHHEEEEEELLLLLLPPPPPPP!!!!!!!
Klio2033 [76]
Check the picture below

if that red segment, GJ, is parallel to the AE base segment of the triangle, then, the segment GJ is the midsegment of the triangle, and by the side-splitter theorem, those two triangles are similar.

7 0
3 years ago
Can you explain too? please and thank you
vitfil [10]

Answer:

I think you do 27 divided by 6 then multiple whatever you get by 17

27 divided by 6= 4.5

X 17 = 76.5

Step-by-step explanation:

I think this is how... you find the amount you need for 1 cup flour then multiply by 17 since you now know the amount of honey needed for one cup flour

7 0
2 years ago
Read 2 more answers
Other questions:
  • A summer carnival charges a $2 admission fee and $0.50 for each ride. If Tamara has $10 to spend, how many rides can she go on?
    7·2 answers
  • Explain why this number 523.691 has different value
    5·1 answer
  • Find (g•f)(3)<br> F(x)=|x+2|<br> g(x)=-x^2
    8·1 answer
  • Please help quick will give brainliest
    13·1 answer
  • Math Help:<br><br> Which two answers are correct?
    9·1 answer
  • Please help! :( ive been stuck on this for about 30 minutes
    14·2 answers
  • It takes 3 hours for marty and cora to weed a garden. How long will it take 6 people to weed the same garden if they all work at
    8·1 answer
  • What is the method to find the slope of y=3x+5.
    5·2 answers
  • I will try to give brainliest just pls help
    6·1 answer
  • How do you solve the picture?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!