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4 years ago

(x+4y+z)(x-7y) what are steps like associative, and commutative and distributive property in a polynomial expression

Mathematics

1 answer:

anzhelika [568]4 years ago

6 0

Answer:

Step-by-step explanation:

your basically multiplying everything in the first parenthesis by everything in the second parenthesis

(x + 4y + z)(x - 7y) =

x(x - 7y) + 4y(x - 7y) + z(x - 7y) =....keep in mind, 4yx is the same as 4xy

x^2 - 7xy + 4xy - 28y^2 + zx - 7zy....combine like terms

x^2 - 3xy - 28y^2 + zx - 7zy <---- your answer

this is the distributive property

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On Saturday, Tom is paid $12.75 an hour plus a Saturday bonus of $25. Sara is paid $11.75 an hour plus a bonus of $29. For how l

iVinArrow [24]

Answer:

They must work for more than 4 hours for Tom's bonus to be greater than Sara's

Step-by-step explanation:

Tom pay: 12.75x+25

Sara pay: 11.75x+29

Tom>Sara = 12.75x+25>11.75x+29

subtract 25 both sides

12.75x>11.75x+4

subtract 11.75x both sides

x>4

7 0

3 years ago

The perimeter of a rectangular building is 1200 feet. The width of the building is 2 feet less than three times the length. What

juin [17]

Given:

The perimeter of a rectangular building is 1200 feet.

The width of the building is 2 feet less than three times the length.

To find:

Width of the building.

Solution:

Let length of the building be x.

Then, width = 3x-2

We know that,

$Perimeter=2(length +width)$

$1200=2(x+3x-2)$

$1200=2(4x-2)$

$1200=8x-4$

Add 4 on both sides

$1204=8x$

Divide both sides by 8.

$\dfrac{1204}{8}=x$

$150.5=x$

Now,

$Width=3x-2$

$Width=3(150.5)-2$

$Width=451.5-2$

$Width=449.5$

Therefore, the width of the building is 449.5 feet.

6 0

3 years ago

Solve for x the triangles are similar

Reil [10]

Answer:

x = 13

Step-by-step explanation:

Since the triangles are similar then the ratios of corresponding sides are equal, that is

$\frac{DC}{DU}$ = $\frac{CB}{UT}$ , substitute values

$\frac{11x-13}{60}$ = $\frac{169}{78}$ ( cross- multiply )

78(11x - 13) = 10140 ( divide both sides by 78 )

11x - 13 = 130 ( add 13 to both sides )

11x = 143 ( divide both sides by 11 )

x = 13

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3 years ago

What is the slope-intercept form of the function that contains the points (5, 6 and (9, 14?the slope-intercept form of the funct

alina1380 [7]

Correct!

The slope is (14-6)/(9-5) = 8/4 = 2;

<span>the slope-intercept form of the function that contains the points (5, 6) and (9, 14) is y - 6 = 2( x - 5 );
Then, y - 6 =2x - 10;
y = 2x - 4 ;</span>

3 0

4 years ago

Giving brainliest!!!!!!!!!!

crimeas [40]

It’s C. hope this helped and good luck !!

5 0

3 years ago

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