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4 years ago

20 points !!! Hurry

Mathematics

2 answers:

weeeeeb [17]4 years ago

7 0

Answer:

Add 9 to each side of the equation.

Step-by-step explanation:

To complete the square, we need to add (b/2) ^2 to each side, where b is the coefficient of the x terms.

The coefficient of the x terms is -6

so we need to add (-6/2) ^2 = (-3)^2 = 9.

Add 9 to each side of the equation.

Dmitry_Shevchenko [17]4 years ago

7 0

Answer:

The coefficient of the x terms is -6

so we need to add (-6/2) ^2 = (-3)^2 = 9.

Add 9 to each side of the equation.

Step-by-step explanation:

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Ivenika [448]

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3 years ago

Josaya takes out a loan of $215000 to purchase a car. the bank charges him 5.2% compounded quarterly on this loan. if he pays ba

timofeeve [1]

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4 years ago

Which linear equation could David use to determine y, the total distance he could swim without stopping to rest?

Gala2k [10]

Answer:

I would say C

Step-by-step explanation:

because I think that 15 is the slope and the 35 is the y intercept. I could be wrong but that would be my guess

8 0

3 years ago

What is the sum of the rational expressions below? X/4 + 3/5x

Andrew [12]

Answer:

The answer is $\frac{5x^2+12}{20x}$ .

Step-by-step explanation:

Given:

X/4 + 3/5x.

Now, to find the sum of the rational expressions.

$\frac{x}{4} +\frac{3}{5x}$

So, to solve it by adding:

$\frac{x}{4} +\frac{3}{5x}$

$=\frac{5x\times x+3\times 4}{5x(4)}$

$=\frac{5x^2+12}{20x}$

Therefore, the answer is $\frac{5x^2+12}{20x}$ .

4 0

3 years ago

The length of a rectangle is 3 inches more than the width. The area is 10 square inches. Find the dimensions

mr_godi [17]

Answer:

Width = 2

Length = 5

Step-by-step explanation:

let A be the area of the rectangle

L be the length of the rectangle

w be the width of the rectangle

Formula: ‘area of a rectangle’

A = L × w

…………………………………………………

A = L × w

⇔ 10 = (w + 3) × w

⇔ 10 = w² + 3w

⇔ w² + 3w - 10 = 0

Solving the quadratic equation w² + 3w - 10 = 0 :

Δ = 3² - 4(1)(-10) = 9 - (-40) = 9 + 40 = 49

then √Δ = 7

$\Longrightarrow w=\frac{-b+\sqrt{\Delta } }{2a} =\frac{-3+7}{2} =2$

$or\ w=\frac{-b-\sqrt{\Delta } }{2a} =\frac{-3-7}{2} =-5$

-5 is not valid ,because w represents the width

which must be a positive number

Then w = 2

Conclusion:

Width = 2

Length = 2 + 3 = 5

6 0

2 years ago