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2 years ago

What is the sokution of -(x)=-8

Mathematics

2 answers:

dem82 [27]2 years ago

4 0

Answer:

x = 8

Step-by-step explanation:

Given

- x = - 8 ( multiply both sides by - 1

- x × - 1 = - 8 × - 1, that is

x = 8

7nadin3 [17]2 years ago

3 0

Answer:

x = 8

Step-by-step explanation:

Given

- x = - 8 ( multiply both sides by - 1

- x × - 1 = - 8 × - 1, that is

x = 8

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Jude says that the volume of a square pyramid with base edges of 9.7 in and a height of 9 in is equal to the volume of a cylinde

earnstyle [38]

Answer:

The correct option is;

Yes, his calculations are correct and the volumes for figures are equal

Step-by-step explanation:

The volume, V, of a square (of side s) pyramid of height h = $\frac{1}{3} \times s^2 \times h$

Where:

s = 9.7 inches

h = 9 inches

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$V = \frac{1}{3} \times 9.7^2 \times 9 = \frac{1}{3} \times 94.09 \times 9 = \frac{1}{3} \times 846.81 = 282.27 \approx 282 \ in^3$

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Where:

Base area = π×r²

r = Radius of the cylinder = 5.47 inches

h = Height of the cylinder = 3 inches

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Therefore, Jude is correct.

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3 years ago

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Step-by-step explanation:

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2 years ago

-6x+5y+2z=-11 -2x+y+4z=-9 4x-5y+5z=-4

AlladinOne [14]

Answer:

$[4, 3, -1]$

Explanation:

When solving systems of equations in three variables, pick two equations to work with first, solve for both variables, plug them into one of the equations you first started on, then in the end, put them altogether:

{-6x + 5y + 2z = -11 ←

{-2x + y + 4z = -9 We can eliminate the y-values obviously

{4x - 5y + 5z = -4 ←

{-6x + 5y + 2z = -11

{4x - 5y + 5z = -4

___________________

-2x + 7z = -15

- 7z -7z

______________

-2x = -15 - 7z

___ ________

-2 -2

x = 7½ + 3½z

-2[7½ + 3½z] + y + 4z = -9

-15 - 7z + y + 4z = -9

-15 - 3z + y = -9

+15 + 15

_______________

-3z + y = 6

+3z + 3z

y = 6 + 3z [Plug in -1 for z to give you the y-value of 3; 3 = y; since you now have both z and y terms, plug in these terms back into all three equations above to get the x-value of 4.]; 4 = x ⤻

-6[7½ + 3½z] + 5[6 + 3z] + 2z = -11

-45 - 21z + 30 + 15z + 2z = -11

-15 - 4z = -11

+15 + 15

_____________

-4z = 4

___ __

-4 -4

z = -1 [Plug this into the equation for y]⤻

I am joyous to assist you anytime.

3 0

2 years ago