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3 years ago

Please help me so I can start packing my stuff for vacation

Mathematics

1 answer:

KengaRu [80]3 years ago

7 0

I'll guess P is the perimeter, the sum of the edge lengths.

In centimeters

I get 4 + 4 + 4 + 4 for the sides of the isoscles triangles

5 + 5 + 2.8 + 2.8 for the rectangular base

5 for the apex/top

P = 4+4+4+4+5+5+2.8+2.8+5=36.6 cm

Not sure why the exact answer isn't there, but first choice seem best.

Get packing.

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Gabriel makes a model of a pyramid with the dimensions shown. A square pyramid. The square base has side lengths of 12 inches. T

GalinKa [24]

Answer:

Area of the square base: 144 in²

Area of each triangular face: 66 in²

Amount of paint needed: 408 in²

Step-by-step explanation:

We basically want to find the surface area of this square pyramid.

First, find the areas of the 4 triangular sides. The area of a triangle is denoted by: $A=\frac{1}{2} bh$ , where b is the base and h is the height.

Here, the base coincides with the side length of the square, so b = 12. The height is 11, so h = 11. Plug these in:

$A=\frac{1}{2} bh$

$A=\frac{1}{2}$ * 12 * 11 = 66 inches squared

Each triangular face is thus 66 inches squared.

Since there are 4 triangles, multiply 66 by 4: 66 * 4 = 264 inches squared

Now, find the area of the square base. The area of a square is: A = s * s, where s is the side length. Here, the side length is 12, so s = 12. Plug this into the equation:

A = s * s

A = 12 * 12 = 144

So, the square base is 144 inches squared.

Finally, add 144 to 264 to get the total area Gabriel needs to paint:

144 + 264 = 408 inches squared

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3 years ago

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HELP 10 POINTS

pashok25 [27]

The 2nd and 4th expressions are the appropriate ones. Both result in '0' which means that Kiana is on the ground floor of the building at the end.

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4 years ago

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What basic trigonometry identity would you use to identify that sin x cos x tan x = 1 - cos^2x

arsen [322]

Answer:

tanx = sinx/cosx

Step-by-step explanation:

Given the expression

sin x cos x tan x = 1 - cos^2x

According to trigonometry identity

tan x = sinx/cosx

Substitute into the expression. From LHS

sin x cos x tan x

= sin x cos x (sinx/cosx)

= sin²x

Also since sin²x+cos²x = 1

Hence sin²x = 1 - cos²x (RHS)

The correct option is therefore tanx = sinx/cosx

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3 years ago

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Use the equation below to answer the question.

Ratling [72]

Answer:

The equivalent equation is correctly matched with a key feature of the graph is

y = 3(x + 2) highlights that the x-intercept is at -2.

Step-by-step explanation:

Given:

$y=3x+6$

Solution:

The Given Equation is in Slope - Point Form i.e

$y=mx+c$

Where,

$m=slope\\\\c=y-intercept$

On Comparing the given equation with above we get

$slope=m=3\\\\y-intercept =6$

Now we Know that

Intercepts:

The line which intersect on x-axis and y-axis are called intercepts.

There are two intercepts:

y-intercept: The line which intersect at y-axis. So when the line intersect at y-axis X coordinate is zero.

x-intercept: The line which intersect at x-axis. So when the line intersect at x-axis Y coordinate is zero.

For x-intercept

Put y = 0 in

$y=3(x+2)$

$0=3x+6\\\\3x=-6\\\\\therefore x=\dfrac{-6}{3}=-2$

∴ x-intercept of

$y=3x+6$

x-intercept = -2

The equivalent equation is correctly matched with a key feature of the graph is

y = 3(x + 2) highlights that the x-intercept is at -2.

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4 years ago