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4 years ago

Exaplain what is the same about two fractions that are like fractions

1 answer:

6 0

Will they are both have the same denominator or sometime it could be bottom number as that 7/20 - 5/20.
hope that helps !!!

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Solve x2 = 12x – 15 by completing the square. Which is the solution set of the equation?

Nady [450]

For this case we have the following polynomial:
$x ^ 2 = 12x - 15
$
The first thing to do is to place the variables on the same side of the equation.
We have then:
$x ^ 2 - 12x = -15
$
We complete the square by adding the term (b / 2) ^ 2 on both sides of the equation.
We have then:
$x ^ 2 - 12x + (-12/2) ^ 2 = -15 + (-12/2) ^ 2
$
Rewriting we have:
$x ^ 2 - 12x + (-6) ^ 2 = -15 + (-6) ^ 2

x ^ 2 - 12x + 36 = -15 + 36
 
(x-6) ^ 2 = 21$
$x-6 =+/- \sqrt{21}$
Therefore, the solutions are:
$x = 6 - \sqrt{21}$
$x = 6 + \sqrt{21}$
Answer:
the solution set of the equation is:
$x = 6 - \sqrt{21}$
$x = 6 + \sqrt{21}$

3 0

3 years ago

Read 2 more answers

If DE=3x+7, EF=2x-3 and DF=7x-9, find DF

Lunna [17]

Answer:

So -63 isn't the right answer. It is either 6.5 or 13/2 based on how your teacher wants the answer.

Step-by-step explanation:

I did the work to show you how i got there. It is definitely not -63. I hope this helps!

5 0

3 years ago

Courtney wants to carpet part of her bedroom that is shaped like a right triangle with

Citrus2011 [14]

Area = 1/2*base*height
= 1/2*4.8*5.2
= 2.4*5.2
= 12.48units

5 0

3 years ago

Philip buys a pizza for $5.99 and is given $14.01 as change.

Alex Ar [27]

Answer:

$14.01 + $5.99 = $20

Step-by-step explanation:

Phillip had 20 dollars before he bought the pizza.

7 0

3 years ago

Don’t Answer is you don’t know!

TiliK225 [7]

Answer:

Rectangular Prism - 2lw + 2lh + 2wh

Triangular prism - 2B + Ph

Pyramid - 2ll +l^2

Cylinder - 2π πrh + 2π πr^2

Cone - πrl + πr^2

Step-by-step explanation:

3 0

2 years ago