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3 years ago

Decimals to fractions 3/4=?

Mathematics

1 answer:

GrogVix [38]3 years ago

7 0

.75 is the decimal form of 3/4

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Find the value of the ratio x ÷ y if the equation is 5x²-13xy+8y²

Maslowich

Answer:

x÷y=8/5 or 1÷1

Step-by-step explanation:

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3 years ago

What is the length of a rectangle with width 20 in, and area 172 in2

timofeeve [1]

Answer:

8.6 inches (Rounded: 9 inches)

Step by Step:

1). w x l = A

2). 20 x l = 172

3). 172/20

4). 8.6

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3 years ago

A piece of cardboard measures 10 ft by 10 ft. Four equal squares of size x are removed from the corners. After removing the squa

Gnesinka [82]

Answer:

The value of x would be $\frac{5}{3}$

Step-by-step explanation:

Given,

The dimension of the cardboard = 10 ft by 10 ft,

∵ After removing four equal squares of size x ( in ft ) from the corners,

The dimension of the resultant box would be,

Length = ( 10 - 2x ) ft,

Width = ( 10 - 2x ) ft,

Height = x ft,

The volume of box,

$V=(10-2x)\times (10 - 2x)\times x=x(10-2x)^2 = x(100 - 40x + 4x^2)=100x - 40x^2 + 4x^3$

Differentiating with respect to x,

$V'=100 - 80x + 12x^2$

Again differentiating with respect to x,

$V''=-80 + 24x$

For maxima or minima,

$V'=0$

$\implies 100 - 80x + 12x^2 = 0$

$\implies 3x^2 - 20x + 25=0$

By quadratic formula,

$x=\frac{20\pm \sqrt{20^2-4\times 3\times 25}}{6}$

$x=\frac{20\pm \sqrt{400 - 300}}{6}$

$x=\frac{20\pm \sqrt{100}}{6}$

$x=\frac{20\pm 10}{6}$

$\implies x = \frac{10}{6}=\frac{5}{3}\text{ or } x = 5$

For x = 5/3, V'' = negative,

While for x = 5, V'' = Positive,

Hence, the value of x would be 5/3 ft for maximising the volume.

8 0

3 years ago

Which expression can be used to determine the length of segment AB?

Stells [14]

Answer:

you need to provide a picture friend

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3 years ago

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Answer: 1. True 2. True 3. False. Number 4 True

Step-by-step explanation: PLS GIVE ME BRAINIEST

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2 years ago