Answer:
A plane consists of an infinite set of points.
A point's location on the coordinate plane is indicated by an ordered pair, (x, y).
Step-by-step explanation:
The undefined terms in geometry are points, lines and planes.
- A point's location on the coordinate plane is indicated by an ordered pair, (x, y). TRUE. In R², the ordered pairs (x,y) is used to defined the location of a point.
- The second statement is false because a point has no dimension.
- The third statement is also false because a line has only one dimension which is length.
- The fourth statement is not true because distance between two points must have a beginning and an end.
- A plane consists of an infinite set of points. TRUE .The plane is a home of infinitely many points.
Answer:
<em>mass of copper in the resulting mixture = 104 grams of pure copper</em>
<em>Percent of the resulting mixture that is copper = 81.25%</em>
<em></em>
Step-by-step explanation:
The complete question is
An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 50 grams of an alloy that contains 52% copper with 78 grams of pure copper. How many grams of copper are in the resulting mixture? What percent of the resulting mixture is copper?
The original alloy has a mass of 50 grams,
52% of this 50 grams is copper,
mass of copper = 0.52 x 50 = 26 grams
78 grams of pure copper added will bring the mass of copper to..
mass of copper = 26 + 78 = <em>104 grams of pure copper</em>
<em></em>
After adding 78 grams of copper to the alloy, the resultant mass of the mixture will be = original mass of alloy + mass of the pure copper added
==> 50 + 78 = 128 grams
Percentage of the resulting mixture that is copper = (total mass of copper in the mixture/total mass of mixture x 100%)
==> 104/128 x 100% = <em>81.25%</em>
Answer:
The money Javier earned installing doors.
Step-by-step explanation:
The problem statement gives insufficient information to answer the question with certainty.
The $56 <em>extra</em> earnings from door installation seems to match the 56 <em>added</em> as a term in Javier's pay, so we <em>assume</em> they are related. There is nothing else in the problem statement suggesting that to be the case.
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<em>Comment on this problem</em>
The problem fails to teach anything about math or critical thinking. Rather, it requires a student to jump to conclusions without any basis in reasoning. If the rest of the curriculum materials are like this, they should be rejected.
Answer:
28
Step-by-step explanation:
4+14+10
