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White raven [17]
3 years ago
8

A coffee table is on sale for 20% off the original price of $115.

Mathematics
1 answer:
snow_lady [41]3 years ago
3 0

Answer: Final price of the coffee table is $98.9.

Step-by-step explanation:

Original price of a coffee table = $115

Discount on a coffee table = 20%

So, After discount, it becomes,

\text{ Price}=\frac{100-20}{100}\times 115\\\\\text{ Price}=\frac{80}{100}\times 115\\\\\text{ Price}=0.8\times 115\\\\\text{ Price}=\$92

Rate of sales tax = 7.5%

So, after tax the price becomes,

\text{ Price}=\frac{100+7.5}{100}\times 92\\\\\text{ Price}=\frac{107.5}{100}\times 92\\\\\text{ Price}=\$98.9

Hence, final price of the coffee table is $98.9.

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Stephanie and alejandro
Elena-2011 [213]

Answer:

Stephanie saved

Step-by-step explanation:

x+4x=15600

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divide by 5 on both sides

you get 3120

since stephanie got 4 times more, you multiply 3120*4 and get 12480

therefore, Alejandro saved 3120

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4 0
2 years ago
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docker41 [41]

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Step-by-step explanation:

7 0
2 years ago
a. For what values of x does f (x )equals 3 x plus 3 sine x have a horizontal tangent​ line? b. For what values of x does f (x )
laila [671]

Answer:

(a)Therefore the value of x=\pi

(b) Therefore the value of x =\frac{\pi}{2}

Step-by-step explanation:

Horizontal tangent line: The first order derivative of a function gives the slope of the tangent of the function. The slope of horizontal line is zero.If the slope of tangent line is zero then the tangent line is called horizontal tangent line.

(a)

Given function is,

f(x)= 3x+3sin x

Differential with respect to x

f'(x)=3+3cos x

For horizontal tangent line, f'(x)=0

3+ 3 cos x= 0

⇒3 cos x=-3

⇒cos x=-1

⇒x = 180° =\pi

Therefore the value of x=\pi

(b)

Given that, the slope is 3.

Then,f'(x)=3

3+ 3 cos x= 3

⇒3 cos x= 3-3

⇒cos x=0

⇒x = 90° =\frac{\pi}{2}

Therefore the value of x =\frac{\pi}{2}

5 0
3 years ago
Which answer it is or like how do you solve it
Dvinal [7]
Triangle 3 because its length is longer than the others.
4 0
3 years ago
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С E A B G 77° D plz help.me​
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90°-77°=13°.

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2 years ago
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