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3 years ago

What is the sum of the number of faces, edges, and vertices for a rectangular prism?

Mathematics

1 answer:

Vera_Pavlovna [14]3 years ago

3 0

Answer: 28

Step-by-step explanation: 6 faces, 12 edges, 8 vertices

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Please help this is the last problem on my homework and I don’t understand how to do it

malfutka [58]

When the lines are parallel and angles are given, and since a straight line is 180°, the 2 angles of the line intersecting the parallel lines have to add up to be 180. Therefore,
21. 31°
22. 96°
23. 149°
24. 84°
25. 53°

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2 years ago

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5x+4 HELP ME PLS it’s for a test I have right now

saveliy_v [14]

Answer:

Here is a graph of that equation.

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2 years ago

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If h(x) = 2x4 - 4x2 - 2x, then h(3)=

Kruka [31]

Answer:

h(3)=-6

Step-by-step explanation:

sub 3 into all the positions which variable X is present

$h(3) =( 2 \times 4) - (4 \times 2) - 2(3)$

$h(3) = 8 - 8 - 6$

$h(3) = - 6$

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2 years ago

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8) The height of a building h varies directly as the length and inversely as the width, if h = 25m when l = 10m and w = 5m, find

shtirl [24]

Let h,l, and w represent the height, length, and width of the building respectively

Then

$\begin{gathered} h\text{ = }\frac{kl}{w} \\ \text{where k is the constant of proportionality} \end{gathered}$ $\begin{gathered} \Rightarrow k=\frac{hw}{l} \\ \Rightarrow k=\frac{25\times5}{10}=12.5 \end{gathered}$ $\Rightarrow h=\frac{12.5l}{w}$

The new value of h = 50m, but l remains the same.

That is l = 10m

Therefore

$\begin{gathered} \frac{50}{1}=\frac{12.5\times10}{w} \\ \Rightarrow\frac{50}{1}=\frac{125}{w} \\ \text{Cross multiplying, we have} \\ 50w\text{ = 125} \\ \Rightarrow\text{ w=}\frac{125}{50}=2.5 \end{gathered}$

Hence, the width is 2.5m

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10 months ago

What is the opposite of -41

Step2247 [10]

The opposite of -41 is positive 41. This is also known as the absolute value of -41

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3 years ago

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