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adelina 88 [10]
2 years ago
8

A music store receives shipments of recorders and harmonics. A shipment of 5

Mathematics
2 answers:
ANTONII [103]2 years ago
8 0
Harmonica = $8
Recorder = $6

We’ll call r the cost of a recorder, h the cost of a harmonica.

5r + 4h = 62
10r + 3h = 84

First, we’ll solve for r in terms of h:
10r = 84 -3h
r = 8.4 - 0.3h

Then we’ll substitute that expression for r in the other equation:

5(8.4 - 0.3h) + 4h = 62
42 - 1.5h + 4h = 62
2.5h = 20
h = 8

Then we’ll substitute that in to solve for the numerical value of r

r = 8.4 - 0.3h
r = 8.4 - 0.3(8)
r = 8.4 - 2.4
r = 6

Check the math:
5r + 4h = 62
5(6) + 4(8) = 30 + 32 = 62


Let me know if you have any questions.
Varvara68 [4.7K]2 years ago
4 0

Answer:

Recorders= $6

Harmonics= $8

Step-by-step explanation:

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b

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Carlos drove to the train station and back. The trip there took five hours and the trip back took four hours. What was Carlos' a
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Answer: 54.4 mph

Step-by-step explanation:

First find the distance to the train station. If it took Carlos 4 hours to come back driving at 68 mph, the distance is:

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This means that Carlos drove for 5 hours to cover 272 miles the first time. His average speed was therefore:

= Distance / time

= 272/5

= 54.4 mph

3 0
3 years ago
Mr. Quick bought a new computer system. The regular price was $1580, but he got 40% off. What is the discount
denpristay [2]

Answer: The discounted price is $948. The value of the discount itself is $632.

Step-by-step explanation:

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In this particular case:

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4 0
2 years ago
Two cars leave a rest stop at the same time and proceed to travel down the highway in the same direction one travels at an avera
Alika [10]

The two cars will be 5.5 miles apart after 5.5 hours.

Step-by-step explanation:

Given,

Speed of first car = 57 mph

Time = 5.5 hours

Distance covered by first car = Speed * Time

Distance covered by first car = 57*5.5 = 313.5 miles

Speed of other car = 58 mph

Distance covered by other car = 58*5.5 = 319 miles

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The two cars will be 5.5 miles apart after 5.5 hours.

Keywords: speed, distance

Learn more about distance at:

  • brainly.com/question/10771256
  • brainly.com/question/10772249

#LearnwithBrainly

6 0
3 years ago
Por favor responder a esta pregunta
ahrayia [7]
Por determinante:
5...1...1
1...0...1 = 0 --> se o determinante for igual a 0, os pontos estarão alinhados.
3...3...1

calculando: (5 x 0 x 1 + 1 x 1 x 3 + 1 x 3 x 1) - (1 x 0 x 3 + 1 x 1 x 1 + 3 x 1 x 5) = 
0 + 3 + 3 - 0 - 1 - 15 = 
6 - 1 - 15 = 
5 - 15 = - 10 --> como não deu zero, os pontos não estão alinhados.
4 0
3 years ago
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