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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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WILL MARK U AS BRAINLIEST PLEASE HELP
adelina 88 [10]

Answer:

782.5inch³

Step-by-step explanation:

The question is on volume of a prism and that of a cylinder

Finding the volume of the prism

V=Bh where B is the base area and h is the height

Base area=14"×14"=196 inch²

height =8"

v=196×8= 1568 in³

Finding volume of the cylinder

v=r²h where r is the radius of cylinder and h is the height of cylinder

r=10/2=5 inches and h=10 inches

v=3.142×5×5×10=785.5inch³

The difference in volume

Difference in volume=1568-785.5=782.5in

5 0
3 years ago
Read 2 more answers
Three Questions 1) What does 5 7/8 - 2 3/8 equal? and 2)What does 5 7/12 -4 1/12 equal?3) What does 3 5/10 - 1 3/10 equal?
stiks02 [169]
1) 28/8=3 1/2
2) 18/12=1 1/2
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7 0
3 years ago
Please give the right answer and show work if possible
balandron [24]

Answer:

B

Step-by-step explanation:

Sin 64=23/a. Let use trig identities to find other points

First, since sin and cos like are complementary angles we can use this formula

\sin(x)  =  \cos(y)  \:  \:  \: x + y = 90

sin 64=23/a

64 + x = 90

x = 26

So cos 26=sin 64 so B is a answer

3 0
3 years ago
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rodikova [14]
2,7, and 6 are all 70 degrees. 1,4,5, and 8 are all 110 degress
7 0
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spayn [35]
<span>A. 45:6 = 15:2
   
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C. 12:8:16 = 3:2:4</span>
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