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4 years ago

For which equation does it make the most sense to solve by completing the square?

Mathematics

2 answers:

Effectus [21]4 years ago

8 0

<span>x² + 20x = 52. Why? Completing the square is easier for this equation in comparison to completing the square for the first two equations.

x^2-8=1 becomes x^2=9, so that x=plus or minus 3. Why bother with completing the square here?

x^2 + 20x = 52
x^2 + 20x + 100 - 100 = 52
(x+10)^2 = 152

taking the sqrt of both sides:

x+10 = plus or minus sqrt(152) (and so on).</span>

never [62]4 years ago

6 0

Answer:

Step-by-step explanation:

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A home Improvement store advertises 60 ft.² of flooring for 287.00 including an 80.00 installation fee write an equation to repr

anastassius [24]

Answer:

$cost = \frac{287}{60} +80$

Step-by-step explanation:

So, for 60 square feet they charge = 287

So, for 1 square foot they charge = $\frac{287}{60}$

If they charge the installation fee this becomes = $\frac{287}{60} +80$

We can write an equation to calculate cost by using this $=\frac{287}{60} x +80$

Where x is the amount of square foot

3 0

3 years ago

En un paralelogramo de tiene ?

soldi70 [24.7K]

Answer:

Elementos y propiedades del paralelogramo

Lados: el paralelogramo tiene cuatro lados, siendo iguales y paralelos dos a dos (a y b). Ángulos: los ángulos interiores son iguales dos a dos, siendo iguales los ángulos no consecutivos (α y β). Como en todo cuadrilátero, sus ángulos interiores suman 360° (2α + 2β = 360°)

Step-by-step explanation:

Elements and properties of the parallelogram

Sides: the parallelogram has four sides, two by two (a and b) being equal and parallel. Angles: the interior angles are equal two by two, the non-consecutive angles (α and β) being equal. As in any quadrilateral, its interior angles add up to 360 ° (2α + 2β = 360 °) (English version lol)

6 0

3 years ago

Jonathan uploaded some original songs and also some pictures. alissa uploaded four times as many songs, but only uploaded twice

lesya [120]

X is the number of songs and Y the number of pics

our 2 equations will be - X+y=11 & 4x+2y=24

consider x=11-y

Lets replace x in 2:

=4(11-y) +2y=24

=44-4y+2y=24

=44-24= 4y-2y

=20= 2y

=Y=20/2

=Y=10

Lets replace y in 1

=X+10=11

=X=11-10

=X=1

To learn more about equations from the given link

brainly.com/question/269374

#SPJ4

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2 years ago

If trianglePTS ~ trianglePQR, find the value of x.

tresset_1 [31]

Answer:

bei2uer22vv

Step-by-step explanation:

8 0

3 years ago

1.) There are 16 juniors and 8 seniors in the Chess Club. If the club

Lena [83]

Answer:

1.) There are 16 juniors and 8 seniors in the Chess Club. If the club members decide to send 9 juniors to a tournament, how many different possibilities are there?

(16 over 9) = 16!/(9!*7!) = 11440

2.) How many different ways can 3 cards be drawn from a deck of 52 cards without replacement?

52*51*50 = 132600

3.) How many different ways can 3 cards be drawn from a deck of 52 cards with replacement?

52^3 = 140608

4.) A corporation has 5 officers to choose from which 3 are selected to comprise the board of directors. How many combinations are there?

(5 over 3) = 5!/(3! * 2!) = 10

5.) A combination lock has the numbers 1 to 40 on each of three consecutive tumblers. What is the probability of opening the lock in ten tries?

10/40^3 = 1/6400

7 0

3 years ago