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ivann1987 [24]
3 years ago
12

Solve the following system of equations by substitution

Mathematics
1 answer:
Deffense [45]3 years ago
7 0
Dhdjdjdjdididjdndn hfnfjfjcjfjjff
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Which of the following is a polynomial?
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Write an equation to represent each situation.
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What is the value of the expression below when x equals 4?<br><br> 13 + 15x
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PLZZZ CHECK ME<br><br> Is this correct, if not please help me.
Gwar [14]
Hello! For this question, you solve using order of operations, which you probably already have remembered as PEMDAS. Anytime a number is raised to the 0 power, that is equivalent to 1. 0.5^0 is 1. 250 * 1 is 250. x = 0 gives us the answer of 250. Now, let's solve for the number by the second power. 0.5² is 0.25. 250 * 0.25 is 62.5. x² gives us 62.5. Now, let's subtract the two numbers together. 250 - 62.5 is 187.5. Because the number is decreasing, the slope is negative, so the answer is -187.5. Your answer is correct.
5 0
3 years ago
The cover of a soccer ball consists of interlocking regular pentagons and regular hexagons. Why can't they be interlocked in thi
FinnZ [79.3K]

Answer: Because of gaps between the vertex of Pentagons and hexagon.

Step-by-step explanation:

The Pentagon has 5 sides and 5 vertex angles. While hexagon has 6 sides and six vertex angles

The sum of the angle of polygon is equal to ( n - 2 )180

Sum of the angle of a Pentagon will be: (5 - 2)×180 = 540

Each vertex angle of a Pentagon = 540/5 = 108

Sum of the angle of hexagon will be: (6 - 2)×180 = 720

Each vertex angle of a hexagon =

720/6 = 120

To interlock Pentagon and hexagon, the sum of the combination of vertex angles of both must be equal to 360 ( sum of the angles at a point = 360)

Since there is no number of combinations that can be equal to 360, there will surely be a gap.

5 0
3 years ago
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