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2 years ago

Someone please help me!!

Mathematics

1 answer:

Black_prince [1.1K]2 years ago

3 0

Answer:

Step-by-step explanation:

All the interior angles of a triangle add up to 180 degrees

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A cube has a surface area of 294 square cm. Find the length of one side.

DerKrebs [107]

Since a cube has 6 sides, we can divide 294 by 6, so we have the area of one side. Since it is a cube, we can just square root that, and you get 7 cm.

6 0

2 years ago

If 2x + 5y = 21 and x + y = 3, then what is the solution

Viefleur [7K]

2x+5y=21, x+y=3
y=3-x
2x+5y=21
2x+5(3-x) =21
2x+15-5x=21
2x-5x+15=21
-3x+15=21
-3x=21-15
-x=6/3
-x=2
x=-2

8 0

2 years ago

a rectangular prism with a volume of 10 cubic units is filled with cubes with side lenghts of 1/2 unit how many 1/2 unit cubes d

Pachacha [2.7K]

Answer:

Step-by-step explanation:

The volume of a cube is

V=s^3, we are told the volume is 10u^3 and that it will be filled with cubes having a side of 1/2 so

n(1/2)^3=10, where n will be the number of these small cubes

n(1/8)=10 upon multiplying each side by 8

n=80

So it will take 80 cubes of side length 1/2 to have a volume equal to 10u^3

6 0

3 years ago

Make n the subject of the formula

kogti [31]

Answer:

$\mathsf{ \frac{m + 21}{5} = n }$

Step-by-step explanation:

To make "n" the subject of the formula, rearrange the formula so it begins with " n = "

To isolate the variable "n", you need to inverse the other terms on that side of the equation where "n" really is.

=> m = 5n - 21

there's a "-21" next to "5n", inverse of subtraction is addition, so add 21 on both sides of the equation.

=> m + 21 = 5n - 21 + 21

=> m+ 21 = 5n

There's also a 5 attached to n, that means the multiplication of n with 5, the inverse of multiplication is division, so dividing both sides of the equation by 5

$\mathsf{ \frac{m + 21}{5} = n }$

3 0

2 years ago

A square has an area of square inch what is <img src="https://tex.z-dn.net/?f=18x%5E%7B2%7D" id="TexFormula1" title="18x^{2}" al

natima [27]

Answer:

18x

Step-by-step explanation:

18x times 18x

so the side is 18x because it was squared

4 0

2 years ago