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3 years ago

Please please please please please please please please please please please please please answer

Mathematics

2 answers:

Mademuasel [1]3 years ago

8 0

The answer is A. You can check by plugging in the numbers for x.

sdas [7]3 years ago

5 0

A. -3, 0, 6

32≥-4(-3)
32≥12

32≥-4(0)
32≥0

32≥-4(6)
32≥-24

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Answer the following questions about the sphere whose equation is given by x2+y2+z2−8x+4y=−4. 1. Find the radius of the sphere.

Anna [14]

Answer:

we have (a,b,c)=(4,-2,0) and R=4 (radius)

Step-by-step explanation:

since

x²+y²+z²−8x+4y=−4

we have to complete the squares to finish with a equation of the form

(x-a)²+(y-b)²+(z-c)²=R²

that is the equation of a sphere of radius R and centre in (a,b,c)

thus

x²+y²+z²−8x+4y=−4

x²+y²+z²−8x+4y +4 = 0

x²+y²+z²−8x+4y +4 +16-16 =0

(x²−8x + 16) + (y² + 4y + 4 ) + (z²) -16 = 0

(x-4)² + (y+2)² + z² = 16

(x-4)² + (y-(-2))² + (z-0)² = 4²

thus we have a=4 , b= -2 , c= 0 and R=4

8 0

3 years ago

Give an example of a real number that is not rational.

Sever21 [200]

Answer:

A not rational number is called a irrational number btw. Anyway Some examples are √2 and pi.

7 0

3 years ago

PLEASE HELP

NeTakaya

Answer:

A rectangular prism in which BA = 20 and h = 6 has a volume of 120 units3; therefore, Shannon is correct

Step-by-step explanation:

step 1

Find the area of the base of the rectangular pyramid

we know that

The volume of the rectangular pyramid is equal to

$V=\frac{1}{3}BH$

where

B is the area of the base

H is the height of the pyramid

we have

$V=40\ units^{3}$

$H=6\ units$

substitute and solve for B

$40=\frac{1}{3}B(6)$

$120=B(6)$

$B=120/6=20\ units^{2}$

step 2

Find the volume of the rectangular prism with the same base area and height

we know that

The volume of the rectangular prism is equal to

$V=BH$

we have

$B=20\ units^{2}$

$H=6\ units$

substitute

$V=(20)(6)=120\ units^{3}$

therefore

The rectangular prism has a volume that is three times the size of the given rectangular pyramid. Shannon is correct

3 0

4 years ago

Please help and answer all the questions

raketka [301]

Answer:

least = minimum

no more than = maximum

3 0

4 years ago

I dont Understand this so can anyone help me please!! Thank you

storchak [24]

Youre correect answer is 70

3 0

3 years ago