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4 years ago

I think it’s 16, can anyone confirm this?

Mathematics

2 answers:

zhannawk [14.2K]4 years ago

8 0

Answer:

So we can do 3*2/2 which is equal to 3. Thats area of the triangle. Then we multiply by 4 for all sides of a pyramid. 3*4 = 12. Lateral area means all sides of the figure not top and bottom, but we know that there is not a top, but there is a bottom. 12 is answer for lateral area

<h2>Answer is 12 not 16</h2>

Marianna [84]4 years ago

4 0

Answer:

Step-by-step explanation:

I believe it is actually 12 in^2

First you have to find the perimeter it is easy to just multiply the sidelength x 4 because it is square.

next you have to multiply the perimeter with the slant height

then you divide your answer by 2

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Last week, Ann bought 9 books and 5 movies for a total of $124.

Elodia [21]

Answer:

Step-by-step explanation:

Set up a system of equations where b is the cost of a book and m is the cost of a movie:

9b + 5m = 124

4b + 21m = 318

Solve by elimination by multiplying the top equation by -21 and the bottom equation by 5:

-189b - 105m = -2604

20b + 105m = 1590

Add the equations together, then solve for b:

-169b = -1014

b = 6

So, the cost of a book is $6

6 0

3 years ago

Evaluate

SCORPION-xisa [38]

Value of the expression will be 7

Explanation

Given value of the variables are : $p= \frac{1}{2}$ and $q=7$

Given expression: $8p+3q-18$

So, plugging the values of $p$ and $q$ into the above expression, we will get...

$8p+3q-18\\ \\ = 8(\frac{1}{2})+3(7)-18\\ \\ =4 + 21-18\\ \\ =25-18\\ \\ =7$

So, the value of the expression will be 7.

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3 years ago

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cestrela7 [59]

Answer: 600

Step-by-step explanation:

20 x 30

= 2 x 10 x 3 x 10

= 2 x 3 x 10 x 10

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4 years ago

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slava [35]

Answer:

Step-by-step explanation:

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3 years ago

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An open top rectangular box with a square bottom has a volume of 120 cubic meters. Its bottom and sides are made from two differ

denpristay [2]

Answer:

The dimensions that minimizes the cost are a= 6.604 (lenght of a side) and h=2.752 (height)

Step-by-step explanation:

Let's define some notation first:

h = represent the height of the box

a= length of a side on the bottom

We need to remember that we have on this case an open box, so then we don't have a top part.

Let's begin with the formula for the volume of the box, we have a total volume given of $120m^3$ , and we know that the volume for a box is the product of the area and the height like this:

$120 m^3 = a^2 h$ (1)

From equation (1) we cna solve for the height and we got:

$h=\frac{120}{a^2}$ (2)

Now let's move to th surface area formula. The top bottom area is $a^2$ and the surface area for the four lateral sides is 4ah. Since we know that the cost for the bottom material is 10 $ per each square meter and for the sides is 12$ per square meter we can create a function cost like this: