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34kurt
3 years ago
9

A $129.50 stereo is discounted 40%. The next month, the sale price is discounted 60%. is the stereo now "free"? If not, what is

the sale price?
Mathematics
2 answers:
Nataly [62]3 years ago
8 0
Discounted 40% means u pay 60%
0.60(129.50) = 77.70....1st discounted price

discounted 60% means u r paying 40%
0.40(77.70) = 31.08 <=== sale price
Paraphin [41]3 years ago
6 0
51.80 $ that is the answer
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Calculate the profit as a percentage of the cost price ,and correct to one decimal place​
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Answer:

(profit / cost price) * 100

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Which value of y is a solution of the inequality? ​ 3y−4&lt;11 ​ y = 6 y = 5 y = 4 y = 7
IrinaVladis [17]

Answer:

y=4

Step-by-step explanation:

4 0
3 years ago
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Use the completing the square method to find the roots of 2x^2+3x-15=13 include the steps, it would be greatly appreciated thank
Monica [59]

Answer:

The roots are

x1= \frac{-3+\sqrt{233}}{4}

x2= \frac{-3-\sqrt{233}}{4}

Step-by-step explanation:

we have

2x^{2}+3x-15=13

so

Group terms that contain the same variable, and move the constant to the opposite side of the equation

2x^{2}+3x=13+15

2x^{2}+3x=28

Factor the leading coefficient  

2(x^{2}+(3/2)x)=28

Complete the square. Remember to balance the equation by adding the same constants to each side

2(x^{2}+(3/2)x+(9/16))=28+(9/8)

2(x^{2}+(3/2)x+(9/16))=233/8

(x^{2}+(3/2)x+(9/16))=233/16

Rewrite as perfect squares

(x+(3/4))^{2}=233/16

square root both sides

(x+\frac{3}{4})=(+/-)\sqrt{\frac{233}{16}}\\ \\(x+\frac{3}{4})=(+/-)\frac{\sqrt{233}}{4}\\ \\x= -\frac{3}{4}(+/-)\frac{\sqrt{233}}{4}

x1= -\frac{3}{4}(+)\frac{\sqrt{233}}{4}=\frac{-3+\sqrt{233}}{4}

x2= -\frac{3}{4}(-)\frac{\sqrt{233}}{4}=\frac{-3-\sqrt{233}}{4}

7 0
3 years ago
An irrational number between 5 and 7
Lorico [155]

By definition we have to:

In mathematics, an irrational number is a number that can not be expressed as a fraction m / n, where m and n are integers and n is different from zero.

For example, the number π is an irrational number.

\pi = 3.141592654

We must find an irrational number between 5 and 7.

We then have the following number:

2\pi = 6.283185307

Answer:

An irrational number between 5 and 7 is:

2\pi = 6.283185307

4 0
4 years ago
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Please can you work out this?
Rama09 [41]

Answer:

0.0692494 = 0.0692

I hope I helped you^_^

4 0
3 years ago
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