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3 years ago

Help ASAP!

Mathematics

1 answer:

fgiga [73]3 years ago

4 0

The value of the expression is 19

Step-by-step explanation:

Step 1: Find the value of 9(n + 2) - 5n when n = 1/4

⇒ 9(n + 2) - 5n = 9(1/4 + 2) - 5 × 1/4

= 9(9/4) - 5/4

= 81/4 - 5/4 = 76/4 = 19

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tester [92]

Answer:

Step-by-step explanation:

34 to the 4

7 0

3 years ago

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

Learn more about equations at brainly.com/question/2972832

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7 0

2 years ago

Keith has $500 in his savings account at the beginning of the summer. He

bixtya [17]

Answer:

weeks

Explanation:

If Keith starts with

500

and wants to end with (at least)

200

he can withdraw up to

500

−

200

300

If he withdraws

week

the

300

will last

XXX

300

week

weeks

Step-by-step explanation:

I apologize if this isn't correct, I tried

7 0

3 years ago

Read 2 more answers

Someone pls help i need help with my math question

11111nata11111 [884]

Answer:

21 units

Step-by-step explanation:

6 0

2 years ago

The sum of the angle measured in a triangle is 180°.Two angle of a triangle measures 20° and 50°.What did is the measure of the

babunello [35]

Answer:

110 Degrees

Step-by-step explanation:

The sum is when different numbers are added.

When all angles are added it adds up to 180 Degrees for any triangle.

Triangles have three sides and two are given as 50 Degrees and 20 Degrees.

There is one angle remaining.

50 Degrees + 20 Degrees = 70 Degrees

Therefore, the last angle must be 110 Degrees. (180-70)

7 0

4 years ago