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3 years ago

Help with this please ..

Mathematics

1 answer:

erastova [34]3 years ago

3 0

N=9
Use the distributive property

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Using the quadratic formula to solve 2x^2 = 4x – 7, what are the values of x?

LekaFEV [45]

For this case we have the following quadratic equation:

$2x ^ 2 = 4x - 7$

Rewriting the equation we have:

$2x ^ 2 - 4x + 7 = 0$

From here, we have:

$a=2 b = -4c = 7$

Substituting values in the quadratic equation we have:

$x = \frac{-b+/-\sqrt{b^2-4ac}}{2a}$

$x = \frac{-(-4)+/-\sqrt{(-4)^2-4(2)(7)}}{2(2)}$

Rewriting the equation we have:

$x = \frac{4+/-\sqrt{16-56}}{4}$

$x = \frac{4+/-\sqrt{-40}}{4}$

$x = \frac{4+/-\sqrt{-4*10}}{4}$

$x = \frac{4+/-2i\sqrt{*10}}{4}$

$x = \frac{2+/-i\sqrt{*10}}{2}$

Answer:

The values of x are given by:

$x = \frac{2+i\sqrt{*10}}{2}$

$x = \frac{2-i\sqrt{*10}}{2}$

3 0

3 years ago

Read 2 more answers

Explain how the following diagram demonstrates the Pythagorean Theorem. (Answer in complete sentences.)

juin [17]

The diagram shows how Pythagoras theorem is applied to a right angled triangle

<h3>Pythagoras theorem</h3>

Pythagoras theorem is used to show the relationship between the sides of a right angle triangle. It is given by:

Hypotenuse² = Adjacent side² + Opposite side²

From the diagram, one box is one unit, using Pythagoras theorem:

5² = 3² + 4²

25 = 9 + 16

25 = 25

The diagram shows how Pythagoras theorem is applied to a right angled triangle.

Find out more on Pythagoras theorem at: brainly.com/question/343682

7 0

3 years ago

What is the median for 18, 7, 32, 4, 13

IgorC [24]

Answer: 13

Step-by-step explanation:

4,7,13,18,32

cross out 4 and 32

7, 13, 18

cross out 7 and 18

there is your median

3 0

3 years ago

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50-20 = 30

shusha [124]

You did everything correctly! I did it myself...all of your subtraction is correct, then I added the answers together and I got 51. Where you trying to get another answer?

4 0

4 years ago

Read 2 more answers

Trevor Linden, a former player for the Vancouver Canucks, is 1.93 m tall. On a hockey card, he is 5.4 cm tall. What scale was us

Anastaziya [24]

Answer:

scale used to print the hockey card is 27/965

scale used to print the hockey card in decimal is 1/35.74

Step-by-step explanation:

we know that in scale problems

scale is used in drawing to enlarge or reduce size of object by a certain amount

scale = size of object in drawing/ actual size of object

Height of trevor = 1.93 m

we know that 1 m = 100 cm

Height of trevor in cm = 1.93 m*100 = 193 cm (actual size)

(this is done so that unit of measurement is same for card and trevor's height i.e cm)

Trevor's card on hockey card = 5.4 cm(size in drawing)

scale used = Trevor's card on hockey card /Height of trevor in cm

= 5.4/193 = 54/ 1930 = 27/965

scale used to print the hockey card is 27/965

scale used to print the hockey card in decimal is 1/35.74

7 0

4 years ago