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3 years ago

13

I'm stuck on this question

2 answers:

mr_godi [17]3 years ago

7 0

You appear to have made an odd, albeit common arithmetical mistake: you seem to have done width x 1/length instead of width x length. The correct way to do this is:

5/12 x 5/6 = (5x5)/(12x6) = 25/72

Rufina [12.5K]3 years ago

3 0

It's easy. Just multiply the fractions.The numerator multiply the numerator and the denominator multiply it by <span>the denominator.</span>
the answer is 25/72,
it means D)
Good luck)

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Write the equation of the sphere in standard form. x^2 + y^2 + z^2 + 2x − 4y − 6z = 22

madam [21]

The equation $x^{2} +y^{2} +z^{2} +2x-4y-6z=22$ in standard form looks like $(x+1)^{2} +(y-2)^{2} +(z-3)^{2} =(6)^{2}$ .

Given equation of sphere be $x^{2} +y^{2} +z^{2} +2x-4y-6z=22$ .

We are required to express the given equation in the standard form of the equation of sphere.

Equation is basically relationship between two or more variables that are expressed in equal to form. Equation of two variables look like ax+by=c. It may be linear equation,quadratic equation, cubic equation or many more depending on the powers of variables. The standard form of the equation of sphere looks like $x^{2} +y^{2} +z^{2} =r^{2}$ .

The given equation is $x^{2} +y^{2} +z^{2} +2x-4y-6z=22$ .

We have to break 22 which is in right side into various parts according to the left side of the equation.

$x^{2} +y^{2} +z^{2} +2x-4y-6z=-1-4-9+36$

$x^{2} +y^{2} +z^{2} +2x-4y-6z+1+4+9=36$

$x^{2} +1+2x+y^{2}+4-4y+z^{2} +9-6z=36$

$x^{2} +(1)^{2} +2*1*x+y^{2} +(2)^{2} -2*2y+z^{2} +(3)^{2} -2*3z=36$

$(x+1)^{2} +(y-2)^{2} +(z-3)^{2} =(6)^{2}$

Hence the equation $x^{2} +y^{2} +z^{2} +2x-4y-6z=22$ in standard form looks like $(x+1)^{2} +(y-2)^{2} +(z-3)^{2} =(6)^{2}$ .

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7 0

1 year ago

Given F= 9/5C+32, the conversion formula for Fahrenheit to Celsius, solve for C

nata0808 [166]

What do you want to solve for? Substitute in c to find F. To solve for C,

<span>F - 32 = 9/5(c) </span>

<span>C = 5/9(F - 32)</span>

6 0

3 years ago

Read 2 more answers

A grocery store is offering a sale on bread and soup. Khalil buys four cans of soup and loaves of bread for $11.67. Ronda buys e

Annette [7]

Answer:

a. The equation should be

4x + 3y = $11.67

8x + y = $12.89

b. The price of one can of soup and the price of one loaf of bread is $1.355 and $2.09

The calculation is as follows:

here we assume the soup be x and bread be y

So, the equations are

4x + 3y = $11.67 .........(1)

8x + y = $12.89.........(2)

Here we need to multiply by 2 in equation 1

8x + 6x = $23.34

8x + y = $12.89

5y = $10.45

y = $2.09

Now x should be

8($2.09) + y = $12.89

x = $1.355

Hope this helps :)

8 0

2 years ago

Semenov [28]

Answer:

NEITHER OF THEM IS THE ANSWER

6 0

3 years ago

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Allisa [31]

X = -3 because i just made a lucky guess

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3 years ago

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