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3 years ago

Simplify 7-[x - (-2x + 9)]. –x - 2 -3x + 16 3x - 2

Mathematics

1 answer:

mylen [45]3 years ago

6 0

- 2x(x^2 - 3)
=(- 2x)(x2) + (- 2x)(- 3)
= - 2x3 + 6x

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How can you use the properties of operations to evaluate<br> this expression?<br> 18 + 4(28)

pentagon [3]

Answer:

first open the bracket by multiplying 28 by 4 which is equal to 112, then add it to 18 which be equal to 130 which is the final answer

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3 years ago

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A department store buys 300 shirts for a total cost of 7,200 and sells them for $30 each. Find the percent markup.

worty [1.4K]

Step-by-step explanation:

7200 ÷ 300 = 24

30 - 24 = 6

6/24 × 100/1 = 25%

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3 years ago

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Please answer correctly! I will mark you as Brainliest!

alukav5142 [94]

Answer:

1024pi/3

Step-by-step explanation:

to find the volume of a sphere you use the equation 4/3*pi*r^3

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(2048/3 pi)/2

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3 years ago

Find the mode of the following data . 12,8,4,8,1,8,9,11,9,10,12,8

Y_Kistochka [10]

Answer:

Step-by-step explanation:

The mode of a set of data values is the value that appears most often

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3 years ago

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The Great Pyramid in Giza, Egypt, is a square pyramid. The dimensions of the pyramid at the time of its completion are shown in

ryzh [129]

Answer:

Area of square pyramid is $153883.8\ m^{2}$ .

Step-by-step explanation:

Diagram of the given scenario is shown below,

Given that,

The Great Pyramid in Giza, Egypt is a square pyramid. The area of base shape is made up with square is $154 \ m^{2}$ . The side of the square is $230 \ m$ and The height of each triangle is $187 \ m$ .

So, Area of Square shape = $154 \ m^{2}$

Side of square = $230 \ m$

Height of each triangle = $187 \ m$

Finding the Height of triangular shape which is here known as slant height.

In Δ ABO, applying Right angle pythagorean Theorem,

Base $(BO)$ = $\frac{230}{2} = 115\ m$

Height $(AO)$ = $187\ m$

Now,

∴ $AB^{2} = AO^{2} \ + \ BO^{2}$

⇒ $AB= \sqrt{AO^{2} \ + \ BO^{2} }$

⇒ $AB= \sqrt{187^{2} \ + \ 115^{2} }$

⇒ $AB= \sqrt{34969 \ + \ 13225 }$

⇒ $AB= 219.53 \ m$

Then,

Area of square pyramid = $area \ of \ square + \ 4\times area \ of \ traiangle$

= $side\times side + 4\times\frac{1}{2}\times AB\times Base$

= $230\times 230 \ + 2\times 219.53\times 230$

= $52900 + 100983.8$

= $153883.8 \ m^{2}$

Hence, Area of square pyramid is $153883.8\ m^{2}$ .

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3 years ago