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Vlada [557]
2 years ago
12

A truck that can carry no more than 7500 lb is being used to transport refrigerators and upright pianos. Each refrigerator weigh

s 200 lb and each piano weighs 425 lb. Write and graph an inequality to show how many refrigerators and how many pianos the truck could carry.
I don't know how long it takes for people to answer or if I can take a question down if it's too late or I already have the answer, but I need it tonight!!

Mathematics
1 answer:
miss Akunina [59]2 years ago
4 0

Answer:

  • 200x +425y ≤ 7500
  • see below for a graph

Step-by-step explanation:

If x represents the number of refrigerators on the truck, then 200x is their total weight in pounds.

If y represents the number of pianos on the truck, then 425y is their total weight in pounds.

The total weight in pounds of refrigerators and pianos on the truck will be ...

  200x + 425y

We want this weight to be at most 7500 pounds, so the limit the truck can carry is given by the inequality ...

  200x + 425y ≤ 7500

____

The graph of this will include negative values of x and y, but the reasonable domain of the inequality does not include those. Consequently, we have restricted the shading (solution region) to non-negative values of x and y.

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Answer:

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Step-by-step explanation:

<em>Casandra finds a treasure chest packed with metallic coins. The chest has a volume of 0.25 cubic meters. The coins have a combined mass of 4825 kg. Hoping to find gold, she calculates the density to determine the metal of the coins.</em>

<em>What kind of metal are the coins made of?</em>

<em>Bronze (8700 kg per cubic meter)</em>

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Density is mass per volume:

D = M / V

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Step-by-step explanation:

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IF THE TRIANGLES IN THE ABOVE FIGURE ARE PROPORTIONAL, WHATS THE LENGTH OF SIDE B?
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<h3>Answer: choice B) 36</h3>

=================================================

Explanation:

The vertical sides, when read from left to right, can be divided to get this fraction: 9/90

Following the same order and direction, we divide the slanting corresponding sides to get: b/360

The fractions we constructed are equal to one another, as the triangles are said to be proportional.

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Lets cross multiply and solve for b

--------------------

9/90 = b/360

9*360 = 90*b

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90b = 3240

90b/90 = 3240/90

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--------------------

A quick way to do this may be to notice how the jump from 9 to 90 is "times 10" so the jump from b to 360 is also "times 10". Think in reverse to divide 360 over 10 and we land on 36 as our answer. This line of thinking does not work as simple for all proportional problems.

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