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REY [17]
3 years ago
7

Derek has $20 to spend on used books. Hardcover books cost $5 each and paperbacks cost $2 each. Complete the equation which dete

rmines the number x of hardcover books and the number y of paperback books he can buy.
Mathematics
1 answer:
nikdorinn [45]3 years ago
8 0

Answer:

The expression would be 5x + 2y = 20

Step-by-step explanation:

We let x be no of hardcover books, and 5x the cost of those books

Same for paperbacks.

then we add them up to 20.

Done!

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If mc008-1.jpg, what is f(5.9)?
yulyashka [42]
The answer:

the full question is if f(x) = 3 [ x - 2 ] , what is f(5.9)?

9
10
11
<span>12

</span>first, [x - 2 ] is called the integer part of x-2, 
generally, to compute f(c) where c is a real number, it is sufficient to substitute the value of x by c.
so <span>f(5.9) = 3 [ 5.9 - 2 ] =  3 [ 3.9 ]

 as we know that </span>[ 3.9 ]=3
<span>
therefore
</span>3 [ 3.9 ]<span>= 3x3 =9

the answer is 9</span>
6 0
3 years ago
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