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3 years ago

What is the surface of a cube with the side lenght of 9cm

Mathematics

1 answer:

marissa [1.9K]3 years ago

5 0

The total surface area is SA = 6 × $a^{2}$ ;
SA = 6 × $9^{2}$ = 6 × 81 = 486 $cm^{2}$ ;

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Write the first six terms of the sequence f(n)=n^3+2

andrey2020 [161]

Answer:

$3,10,29,66,127,218$

Step-by-step explanation:

$f(n) = n^3 +2\\\\f(1) = 1^3 +2 = 1+2=3\\\\f(2) =2^3 +2 = 8+2=10\\\\f(3)=3^3 +2 = 27+2 = 29\\\\f(4) = 4^3 +2 = 64 +2 = 66\\\\f(5) = 5^3 +2 = 125+2 = 127\\\\f(6) = 6^3 +2 = 216+2 = 218$

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1 year ago

How to do 2(x-5)-8=20

Romashka [77]

Answer:

Solution for 2(x-5)-8=20 equation:

Simplifying

2(x + -5) + -8 = 20

Reorder the terms:

2(-5 + x) + -8 = 20

(-5 * 2 + x * 2) + -8 = 20

(-10 + 2x) + -8 = 20

Reorder the terms:

-10 + -8 + 2x = 20

Combine like terms: -10 + -8 = -18

-18 + 2x = 20

Solving

-18 + 2x = 20

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '18' to each side of the equation.

-18 + 18 + 2x = 20 + 18

Combine like terms: -18 + 18 = 0

0 + 2x = 20 + 18

2x = 20 + 18

Combine like terms: 20 + 18 = 38

2x = 38

Divide each side by '2'.

x = 19

Simplifying

x = 19

3 0

2 years ago

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Three questions about areas of triangles

masha68 [24]

Answer:

How to find the area, how to find the high, and how to find the side.

Step-by-step explanation:

Yep that's all.

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2 years ago

Question:

kaheart [24]

Answer:

-29

Step-by-step explanation:

${\sqrt{7 - y }}^{2} = {6}^{2}$

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y = 7-36

y = -29

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3 years ago

The formula for the volume of a pyramid is V = Bh. Express h in terms of B and V. 0 0 =

strojnjashka [21]

Answer:

h = $\frac{V}{B}$

Step-by-step explanation:

Given

V = Bh ( isolate h by dividing both sides by B )

$\frac{V}{B}$ = h

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3 years ago

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