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morpeh [17]
3 years ago
5

Solve the equation. X^2 + 22x = -40 The solutions to the equation are

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
3 0

Answer:

x_{1}=-2

x_{1}=-20

Step-by-step explanation:

x^2 + 22x = -40

x^2 + 22x+121 = -40+121

Completing Square:

(x+11)^2=81

x+11=\pm\sqrt{81}

x=-11\pm9

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These four numbers are plotted on a number line: -2/3, 5/8, -3/5, and -1/2. Which is the correct ordering on the number line fro
stiks02 [169]

Answer:

-2/3 ; - 3/5 ; - 1/2 ; 5/8

Step-by-step explanation:

Given that:

We could convert the numbers to decimal to obtain a better view of the values :

-2/3 = - 0.66666

5/8 = 0.625

-3/5 = - 0.6

-1 /2 = - 0.5

Negative values are always arranged first on left of a number line.

-0.66666 < - 0.6 < - 0.5 <0.625

Hence,

-2/3 ; - 3/5 ; - 1/2 ; 5/8

5 0
3 years ago
A laundry basket contains 34 white socks and 62 tan socks. What is the probability that a random selected sock will be white?
allochka39001 [22]

Answer

34/96 or simplify it, 17/48

Step-by-step explanation:

62+34=96

And because you have 34 white socks, 34/96 or simplify it, 17/48

7 0
3 years ago
At the store for every 6 books sold there were 5 movies sold. What is the ratio of books sold to movies sold?
tatyana61 [14]

Answer:

6,5

Step-by-step explanation:

6 + 5 = 11

6 to 5

6,5

3 0
3 years ago
The mean of Holly's first six math quiz scores was 75%. After taking the seventh quiz, her
lord [1]
The total of her first six quizzes is 75*6 = 450

Let her seventh score be x
The total of her seven quizzes be 450+x

Then, (450+x)/7 = 77
x = (77*7) - 450 = 89

Her seventh score is 89
x =
3 0
3 years ago
Determine the solution and indicate the restrictions on the variable.
cupoosta [38]

Answer:

B

Step-by-step explanation:

Subtract 20 from both sides:

-\sqrt{9-8x} =-15

Divide both sides by -1:

\sqrt{9-8x} =15

Square both sides:

9-8x=255

Subtract 9 by both sides:

-8x=216

Divide both sides by -8:

x=-27

That means that either a or b is correct and since 9/8 is positive that means it needs to bee less than 9/8 so the correct answer is B

5 0
2 years ago
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