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3 years ago

I need help with this question???

Mathematics

1 answer:

polet [3.4K]3 years ago

8 0

Answer:

$7x + 3y- 2+6x-1+y^2 = y^2+ 3y+13x- 3$

Step-by-step explanation:

Given

$7x + 3y- 2+6x-1+y^2$

Required

Simplify

Start by collecting like terms

$7x + 3y- 2+6x-1+y^2 = y^2+ 3y+7x +6x- 2-1$

Simplify like terms

$7x + 3y- 2+6x-1+y^2 = y^2+ 3y+13x- 3$

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Complete the factored form of the algebraic expression <br> 18a + 3 = 3 ( + )

Pavel [41]

Answer: 0

Step-by-step explanation: 18a + 3 = 3

-3 -3

--------------

18a = 0 you can't divide 18 and zero it would be 0

8 0

3 years ago

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1+h+j.h÷4; use h=8, and j=2

horrorfan [7]

Answer:

1+8+2/4 = 9.5

Step-by-step explanation:

yeppp that's itttt

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3 years ago

The two hexagonal pyramids are similar.

spayn [35]

Answer: The approximate surface area of the larger pyramid is 159.31 ft².

Step-by-step explanation:

A pyramid is a solid,

And, When two solids are similar then the ratio of their surface area is the square of the scale factor of similarity.

Here, the scale factor of similarity

$=\frac{\text{Height of larger pyramid}}{\text{Height of smaller pyramid}}$

$=\frac{15}{6}$

Thus, by the above property,

$\frac{\text{ The surface area of larger pyramid}}{\text{The surface area of the smaller pyramid}}=(\frac{15}{6})^2$

It is given that, the smaller pyramid has a surface area of 25.49 ft²,

$\implies \frac{\text{ The surface area of larger pyramid}}{25.49}=\frac{225}{36}$

$\text{ The surface area of larger pyramid} = \frac{25.49\times 225}{36}$

$=\frac{5735.25}{36}$

$=159.3125\approx 159.31\text{ square ft}$

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3 years ago

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A book costs $1.49 and is sold in a retail store for $8.99. What is the percentage in mark up? *

leonid [27]

Answer:

1.49 and is sold in a retail store for $8.99. What is the percentage in mark up? *

Step-by-step explanation:

$2.90 for each book produced. If the book is sold to distributors for $10 each, how many must be sold to break even?

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2 years ago

Help me with this please

Allisa [31]

Answer:

Step-by-step explanation:

3x = -21

-21+ -14 = -35

-35 + 5 = 30

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3 years ago