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Ede4ka [16]
3 years ago
7

What number must you add to complete the square? x^2 + 8x = -3

Mathematics
1 answer:
KonstantinChe [14]3 years ago
5 0
<span>x^2 + 8x = -3
</span><span>x^2 + 8x + 16 = -3 + 16
using a^2 + 2 a b + b^2 = (a+b)^2
</span><span>
</span>x^2 + 8x + 16 = 13

<span>(x +4)^2 = 13

answer : 16 is the number </span><span>you must add to complete the square</span>
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Can I get some help please?
mamaluj [8]

Answer:

1)   68

    / \

 4     17

  /\

2  2

68=2*2*17

2)  104

   /      \

 4      26

  /\       /\

2  2   2   13

104=2*2*2*13

3) 78

    /\

 2    39

        /\

      3   13

78=2*3*13

4) 225

    /\

  9   25

  /\    /\

 3 3  5 5

225=3*3*5*5

Second Part:

1)  45

    /\

  3  15

       /\

      3 5

45=3*3*5

2)  70

     /\

   2   35

          /\

        5  7

70=2*5*7

3)  54

     /\

   9   6

   /\    /\

  3 3  2 3

54=3*3*2*3

4)  126

      /\

    3   42

          /\

         3  14

               /\

              7  2

126=3*3*7*2

3 0
2 years ago
6. HOT AIR BALLOON А balloon rises<br>340 feet into the air. Then it descends<br>130 feet.​
Nezavi [6.7K]
Now it is at 210 feet
7 0
2 years ago
Read 2 more answers
What is the solution to sqrt 17-x=x+3? Show your work.
snow_lady [41]

Answer:

x=1

Step-by-step explanation:

Remember:

(\sqrt[n]{a})^n=a\\\\(a+b)=a^2+2ab+b^2

Given the equation \sqrt{17-x}=x+3, you need to solve for the variable "x" to find its value.

You need to square both sides of the equation:

(\sqrt{17-x})^2=(x+3)^2

17-x=(x+3)^2

Simplifying, you get:

17-x=x^2+2(x)(3)+3^2\\\\17-x=x^2+6x+9\\\\x^2+6x+9+x-17=0\\\\x^2+7x-8=0

Factor the quadratic equation. Find two numbers whose sum be 7 and whose product be -8. These are: -1 and 8:

(x-1)(x+8)=0

Then:

x_1=1\\x_2=-8

Let's check if the first solution is correct:

\sqrt{17-(1)}=(1)+3

4=4 (It checks)

Let's check if the second solution is correct:

\sqrt{17-(-8)}=(-8)+3

5\neq-5 (It does not checks)

Therefore, the solution is:

x=1

3 0
3 years ago
Jason tracked the days of the week for the last 50 times he was assigned homework.
vovangra [49]

Answer:

Hello, mizuki here to help!

The correct answer would be C

Step-by-step explanation:

Ok, so the total of homework he got was 50, and the number of homework he got in monday was 16.

So.... it should be expressed as 16/50 which would be 0.32

3 0
3 years ago
What is the range of a cosine function?
klemol [59]
The smallest y can be is y = -1. The largest it can be is y = 1. The value of y can be anything in between. The value of y is a real number.

Answer: Choice D) All real numbers between -1 and 1 including -1 and 1

Note: we can write that as -1 \le y \le 1 which in interval notation would look like [-1, 1]. The square brackets tell us to include the endpoints.
4 0
2 years ago
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