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scZoUnD [109]
3 years ago
12

Solve the equation 2x^2+8x-1=0 by completing the square. Give your answer to 2 decimal places 4 marks

Mathematics
1 answer:
ad-work [718]3 years ago
3 0

Answer:

Step-by-step explanation:

You might be interested in
Stella graphs the equation y=1/3x – 2
faltersainse [42]

we have

y=\frac{1}{3}x-2

<u>Statements</u>

<u>case A)</u> The graph is a straight line.

The statement is True

Because, this is a linear equation (see the attached figure)

<u>case B)</u> The line passes through the origin.

The statement is False

Because the point (0,0) is not a solution of the equation

Verify

Substitute the value of x and y in the equation

0=\frac{1}{3}*0-2

0=-2 ------> is not true

the point (0,0) is not a solution

therefore

The line does not pass through the origin

<u>case C)</u> The line passes through the point  (0,-2)

The statement is True

Because the point (0,-2) is a solution of the equation

Verify

Substitute the value of x and y in the equation

-2=\frac{1}{3}*0-2

-2=-2 ------> is true

the point (0,-2) is a solution

therefore

The line passes through the point (0,-2)

<u>case D) </u>The slope of the line is 3

The statement is False

Because, the slope of the line is m=\frac{1}{3}

<u>case E)</u> The y-intercept of the line is 2

The statement is False

we know that

The y-intercept is the value of y when the value of x is equal to zero

so

For x=0

find the value of y

y=\frac{1}{3}*0-2=-2

the y-intercept is equal to -2


5 0
3 years ago
Read 2 more answers
11
spayn [35]

Answer:

$21 / 6 burgers= price per burger

$3.50 per burger

Brainiest plz?

3 0
3 years ago
At 7:00pm one evening, the temperature was -8°F. At 6:00am the next morning me
OleMash [197]

Answer:

B mark me brainliest!!!!?

Step-by-step explanation:

It increased 37 F

A) -8-|25| is -8-25 which is -37 it didn’t decrease lol!

B) |-8-25| is |-37| which is 37 which is the answer

C) -37 nope

D) 8-25 is not 37 so the answer is B

4 0
2 years ago
Help on this please
AveGali [126]
18 11 25 8 4 !!!!!!!!
5 0
3 years ago
Simplify 4^2 * 4^8= A.)4^16 B.)4^10 C.)16^16 D.)16^10 please help me i need this asap.
SVEN [57.7K]

Answer:

4^{10}

Step-by-step explanation:

Complete the exponents first.

4*4=16

4*4*4*4*4*4*4*4=65536

65536 *16= 1048576

The answer is 4^{10}

You can also find this if you add the exponents.

6 0
2 years ago
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