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3 years ago

10

Evaluate the radical expression. Express your answer as an integer, simplified fraction, or a decimal rounded to two decimal pla

ces. If the expression does not represent a real number, indicate "Not a Real Number"

1 answer:

Lera25 [3.4K]3 years ago

8 0

Answer:

undefined

Step-by-step explanation:

the expression is undefined in the set of real numbers

( HOPE THIS HELPED)

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The width of a box in the shape of a rectangular prism is 4 inches more than the height h . The length is the difference of 9 in

Doss [256]

Answer:

$(a)$ $V = -H^3+ 5H^2 + 36H$

$(b)$ $Length = 5in; Width = 9in; Height = 5in$ or $Length = 3in; Width = 10in; Height = 6in$

Step-by-step explanation:

Let:

$W=Width; L = Length; H = Height$

Given

$W = 4 + H$

$L = 9 - H$

Solving (a): The polynomial for the volume in terms of height

Volume (V) is calculated using:

$V = L * W * H$

$V = (9 - H) * (4 + H) * H$

Expand

$V = (9 - H) * (4H + H^2)$

Open brackets

$V = 36H + 9H^2 - 4H^2 - H^3$

$V = 36H + 5H^2 - H^3$

Rewrite as:

$V = -H^3+ 5H^2 + 36H$

Solving (b): The dimensions when Volume = 180

Substitute 180 for V in: $V = -H^3+ 5H^2 + 36H$

$180 = -H^3+ 5H^2 + 36H$

Rewrite as:

$H^3 - 5H^2 - 36H + 180 = 0$

Factorize:

$H^2(H - 5) - 36(H - 5) = 0$

$(H^2 - 36)(H - 5) = 0$

Express $H^2 - 36$ as difference of two squares

$(H - 6)(H + 6)(H - 5) =0$

This gives:

$H - 6 =0==> H = 6$

$H + 6 =0==> H = -6$

$H - 5 =0==> H = 5$

Since the height can not be negative, then H = 5 or H = 6

Recall that:

$W = 4 + H$

$L = 9 - H$

When H = 5

$W = 4 + 5 = 9$

$L = 9 - 5 = 4$

When H = 6

$W = 4 + 6 = 10$

$L = 9 - 6 = 3$

Hence, the dimensions of the box are:

$Length = 5in; Width = 9in; Height = 5in$

or

$Length = 3in; Width = 10in; Height = 6in$

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3 years ago

Write an expression to represent:

charle [14.2K]

Answer:

s= 1 • 4 + x

Step-by-step explanation:

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3 years ago

What’s the value of x ?

ioda

Answer:

x=70

Step-by-step explanation:

Because these angles are on the opposite sides of each other, they have to add up to 180. This will make the equation 2x-5+45=180. Simplify this to get 2x+40=180. Subtract 40 from both sides to get 2x=140. Divide each side by 2 to isolate x. x=140/2. Simplify this to get x=70.

If this helps please mark as brainliest

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3 years ago

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in a parking lot of 240 red and blue cars, the ratio of red cars to blue cars is 3: 5. How many red cars are in the parking lot?

butalik [34]

Answer:

90 red cars, 150 blue cars

Step-by-step explanation:

Divide 240 by 8. 8 comes from the 3:5 ratio (3+5). 240/8=30. 30x3=90, 30x5=150.

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4 years ago

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Eliana is reading a 934 page book. She reads 16 pages per day in the book. If x represents the number of days Eliana has spent r

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