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uysha [10]
2 years ago
11

Solve the equation using the method of completing the square.

Mathematics
2 answers:
crimeas [40]2 years ago
4 0

Answer:

D) x = ± 2√5 - 4

Step-by-step explanation:

2x² + 16x - 8 = 0

Yah, i plugged this into m a t h w a y

(all of ur questions pretty much can use this app or website)

Furkat [3]2 years ago
3 0

Answer:

D

Step-by-step explanation:

Given

2x² + 16x - 8 = 0 ( divide through by 2 )

x² + 8x - 4 = 0 ( add 4 to both sides )

x² + 8x = 4

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(4)x + 16 = 4 + 16

(x + 4)² = 20 ( take the square root of both sides )

x + 4 = ± \sqrt{20} = ± \sqrt{4(5)} = ± 2\sqrt{5} ( subtract 4 from both sides )

x = - 4 ± 2\sqrt{5} → D

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A dolphin jumps out of the water with
Mandarinka [93]

Answer:

t=1.25\ sec

Step-by-step explanation:

we have

h(t)=-16t^{2}+20t

where

t is the time in seconds

h is the dolphin's height in feet

we know that

When the dolphin return to the water the value of h(t) is equal to zero

so

For h(t)=0

0=-16t^{2}+20t

16t^{2}=20t

Simplify

16t=20

t=\frac{20}{16}

t=\frac{5}{4}=1.25\ sec

see the attached figure to better understand the problem

3 0
2 years ago
Graph the line with the equation y=-\frac{3}{4}x+5y=− <br> 4<br> 3<br> ​<br> x+5.
Gnesinka [82]

Answer:

x=0, y=5

Step-by-step explanation:

Here's the graph below.

3 0
2 years ago
What is between 0.33 0.34
Shtirlitz [24]
Before you write three numbers between 0.33 and 0.34 , you need to indicate whether you want rational numbers or real numbers (that is including irrational numbers).
6 0
3 years ago
What is the volume of the triangular prism
NARA [144]
4x10x14 = 560

the volume is 560
7 0
3 years ago
Read 2 more answers
Nember 1: 2/7 as decimal
MariettaO [177]

Answer:

Number 1: <em>0.28571428571429</em>

Number 2: <em>2.1666666666667</em>

Number 3: <em>0.1875</em>

Number 4: <em>0.75</em>

Number 5: 0.5

Number 6: <em>13.875</em>

Number 7: <em>8.66666666667</em>

Number 8: <em>0.625</em>

Step-by-step explanation:

To get decimal

You have to divide numarator with denominator

2 : 7

5/10 = 5:10 = 0.5

When you have mixed number you have to multiply number not fraction with denominator and then add numarator

2 1/6 = 12 + 1 / 6 = 13/6 = 13 : 6 = 2.1666667

2x6 + 1

It doesn't matter how many numbers you'll add. At the end of the Number is best to add this

_

6

It means that number is repeating. You can still round it tho :-)

We can also say that

6

-- is same as 6:12

12

Solutions:

2/7 = 2:7 = 0.28571428571429

2 1/6 = 12 + 1 / 6 = 13/6 = 13 : 6 = 2.1666667

2x6 + 1

3/16 = 3 : 16 = 0.1875

3/ 4 = 3 : 4 = 0.75

5/10 = 5 : 10 = 0.5

13 7/8 = 104 + 7/8 = 111/8 = 111 : 8 = 13.875

13 x 8

8 10/15 = 120 + 10/15 = 130/15 = 130 : 15 = 8.66667

5/8 = 5:8 = 0.625

Maybe it can seems hard but it's pretty easy! I hope you will read whole explanation :-)

Have a nice day!

<em>P.S.: If you have any questions write me on Amino Ayleena :-) </em>

8 0
2 years ago
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