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Annette [7]
3 years ago
15

X^2 -x-20=0 Solve the equation by completing the square

Mathematics
1 answer:
Igoryamba3 years ago
4 0
X=4
first you add 20 to both sides
then you try all numbers that square to get less than 20 and 4 is the correct one
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Can y’all plz help thx
astraxan [27]
The answer: 17 degrees
7 0
4 years ago
HELP PLEASE 80 POINTS
alexgriva [62]

Answer:

  • x = 15/p
  • x = -3

Step-by-step explanation:

<h3>Given</h3>
  • 4(px + 1)=64
<h3>Find</h3>
  • Solve for x
  • Find x when p = -5
<h3>Solution</h3>
  • 4(px + 1) = 64
  • 4(px + 1)/4 = 64/4
  • px + 1 = 16
  • px = 15
  • x = 15/p

<u>When p = -5, substitute p:</u>

  • x = 15/p
  • x = 15/(-5) = -3
4 0
3 years ago
Read 2 more answers
How many solutions does this linear system have?
ziro4ka [17]

Answer: C is correct, No solution

Step-by-step explanation:

Let’s simplify the second equation,

8x-4y=-20

We can divide the whole equation by 4...

8x/4-4y/4=-20/4

Which becomes....

2x-y=-5

Now let’s move things around to see if it’s the same equation as the one on top...

-y=-2x-5

y=2x+5

Now we need to solve the systems...

y=2x-5

y=2x+5

Since their slopes are both 2 and their y-intercepts are not identical, the answer is no solution. The two lines will continue on without ever crossing because they have the same slope.

4 0
4 years ago
I need these numbers in scientific notation, please! Thank you!
Shkiper50 [21]

\text{The scientific notation:}\\\\a\cdot10^k\ \text{where}\ 1\leq a

18.4\ m=1.84\cdot10\ m\\\\0.000000000172\ g=0\underbrace{.0000000001}_{10\to}72=1.72\cdot10^{-10}\ g\\\\4292000\ s=4\underbrace{292000}_{\leftarrow6}\ s=4.292\cdot10^6\ s\\\\8.3\ \cdot10^{-4}\ m\\\\1.496\cdot10^8\ m\\\\23.1\cdot10^{-3}\ kg=2.31\cdot10\cdot10^{-3}\ kg=2.31\cdot10^{-2}\ kg

4 0
3 years ago
Find the value of<br> 10!<br> (10-3)<br> A. 70<br> B. 120<br> O C. 5040<br> O D. 720
GarryVolchara [31]

Answer:

The answer is option D.

Step-by-step explanation:

\frac{10!}{(10 - 3) ! }  =  \frac{10!}{7!}  =  \frac{3628800}{5040}  = 720

Hope this helps you

8 0
3 years ago
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