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Luba_88 [7]
3 years ago
13

3. At a bargain store, Beast Boy bought 5 items that each cost the same amount. Cyborg bought 8 items that each cost the same am

ount, but each was $1.50 less than the items that Beast Boy bought. Both Beast Boy and Cyborg paid the same amount of money. What was the individual cost of each person's items?
(a) Write an equation. Let x represent the cost of one of Beast Boy's items.
(b) Solve the equation. Show your work.
(c) Check your solution. Show your work.
(d) What was the individual cost of each person's items? State the solution in complete sentences.
Mathematics
1 answer:
lara [203]3 years ago
6 0

Answer:

  • See below

Step-by-step explanation:

(a)

<u>Beast Boy spent:</u>

  • 5x

<u>Cyborg spent:</u>

  • 8(x - 1.5)

<u>They spent same amount:</u>

  • 5x = 8(x - 1.5)

(b)

  • 5x = 8x - 12
  • 8x - 5x = 12
  • 3x = 12
  • x = 4

(c)

  • 5*4 = 8(4 - 1.5)
  • 20 = 8*2.5
  • 20 = 20

(d)

  • Beast Boy bought 5 items that each cost $4
  • Cyborg bought 8 items that each cost $2.5

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An open-top rectangular box with square base is to be made from 100 square feet of material, as shown.
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<h3>How to maximize volume of a box?</h3>

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sweet-ann [11.9K]

Answer

Step-by-step explanation:

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Only the last two options are true.

The first one is false, because 4.5 is the value of the maximum of f(x), not the point where it is reached.

The second one is false, because g(x) has a maximum of 9, so it is a downward-facing parabola (just like f(x)), so it doesn't have a minimum.

The third one is true, because the maximum value of f(x) is 4.5, and the maximum value of g(x) is 9, which is twice the maximum of f(x)

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