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Natasha_Volkova [10]
3 years ago
7

I bought 3 Books my total is 150$ 1 book is 50% more expensive than all of them how much is it

Mathematics
1 answer:
Olin [163]3 years ago
5 0

Answer:

The more expensive book cost $90, the other two combined cost $60.

Step-by-step explanation:

x = cost of more expensive book

y = subtotal cost of the other books

x = 50% more than y, so x = 1.50y = 1.5y

x + y = total cost = $150

1.5y + y = 150

y = 150/2.5 = 60

x = 1.5y = 1.5(60) = 90

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Answer:

1 5/18

Step-by-step explanation:

4/9 = 8/18

5/6 = 15/18

15/18 + 8/18 = 23/18 = 1 and 5/18

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Help please, I attached the question. Is it a!? <br> 
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Answer:

A

Step-by-step explanation:

Recall that for a quadratic equation of the form:

0=ax^2+bx+c

The number of solutions it has can be determined using its discriminant:  

\Delta = b^2-4ac

Where:

  • If the discriminant is positive, we have two real solutions.
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We have the equation:

2x^2+5x-k=0

Thus, <em>a</em> = 2, <em>b</em> = 5, and <em>c</em> = -<em>k</em>.

In order for the equation to have exactly one distinct solution, the discriminant must equal zero. Hence:

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Substitute:

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Solve for <em>k</em>. Simplify:

25+8k=0

Solve:

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Step-by-step explanation:

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For an ordered pair (x,y) that a set contain :

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