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3 years ago

(3x+20)+(7x+50)=90 Solve for X

2 answers:

6 0

Combine your like terms.
So 3x + 7x
and
20+50

Write your new equation and equate it to 90.
Put everything numerical on one side and the other ( the unknown aka the x)
to another side of the equal sign.

djverab [1.8K]3 years ago

3 0

(3x+20)+(7x+50)=90

x=2

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If you are buying at item at a store for a price of $34, and there is a 7.3% tax added on top, what would be the total amount du

Norma-Jean [14]

Answer:

See below.

Step-by-step explanation:

Divide the percentage to find the decimal form.

$\frac{7.3}{100} =0.073$

Multiply the total by the percentage.

$34*0.073=2.482$

$2.482$ rounded to the nearest cent is $2.48$ .

Add the total.

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6 0

3 years ago

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A new building is being constructed at UT Austin. It is 200 feet tall, and has a

Mariana [72]

Answer:

Walkway is 3 feet wide.

Step-by-step explanation:

Given:

Length of the building is 150 ft

width of the building is 100 ft

walkway is x ft wide.

Total area(around and including the building) = 16536 square feet

Solution:

Length of the total area will be = length of the building + width of walkway from 2 sides = $150 +2x$

Width of the total area will be = width of the building + width of walkway from 2 sides = $100 +2x$

Now Total area(around and including the building) = Length of the total area $\times$ Width of the total area

$(150+2x)\times(100+2x)=16536\\15000+300x+200x+4x^2=16536\\500x+4x^2=16536-15000\\4(125x+x^2)=1536\\125x+x^2= \frac{1536}{4}=384\\$

$x^2+125x-384=0\\x^2-3x+128x-384=0\\x(x-3)+128(x-3)=0\\(x-3)(x+128)=0\\$

Now solving for both equation we get.

$x+128=0\\x=-128\\x-3=0\\x=3$

Now, We get 2 values for x which -128 and 3 but the width of the building can't be in negative value hence we will consider value of x be 3.

∴ Width of the walkway is 3 ft.

4 0

3 years ago

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Aleksandr-060686 [28]

3y + 5.2 = 2 - 5y
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3 years ago

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vfiekz [6]

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3 years ago

How will the area of the circle change if it is dilated by a scale factor of 1/2? The area will be 2 times greater than the orig

coldgirl [10]

We know that

[scale factor]=1/2
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therefore

the answer is
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