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jonathanxu999
Username
jonathanxu999
Score
64
Stats
Questions
12
Answers
2
13 Questions
2 Answers
0
11
0
+64
Catalan sequence
In a 6 by 6 grid, how many pathways can be drawn from S to F, S is the top left corner and F is the bottom right corner (always moving to the right or down) that cross the main diagonal at least once? (You can use the Catalan sequence for this question,
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jonathanxu999
4 hours ago
0
40
4
+64
catalan sequence
In a 6 by 6 grid, how many pathways can be drawn from S to F, (always moving to the right or down) that cross the main diagonal at least once? (You can use the Catalan sequence for this question, but it is possible to solve without it.) Don't try drawing
read more ..
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jonathanxu999
Jan 20, 2018
+1
36
2
+64
root of the equation
If the height of an equilateral triangle is also a root of the equation y4-3y2-270, then the area of the triangle, in cm2 is,
A)
B)
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jonathanxu999
Jan 16, 2018
+2
60
1
+64
Final mathematics exam
The final mathematics exam at a certain school contains questions of equal difficulty and is matched to the students' past performance in mathematics. Four students who take the exam have averages 25%, 50%, 60%, and 80%. What is the probability that at
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Alan
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jonathanxu999
Jan 13, 2018
0
48
0
+64
The digits 2,4,6,8 and 0
The digits 2,4,6,8 and 0 are used to make five digit numbers with no digit repeated. What is the probability that a number chosen at random for these numbers has the property that the digits in the thousand's place and the ten's place are each larger than
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jonathanxu999
Dec 20, 2017
+1
63
1
+64
The sum of the two parallel sides of a trapezoid is 22 cm.
The sum of the two parallel sides of a trapezoid is 22 cm. The segment that connects the midpoints of the two non-parallel sides divides the area of the trapezoid into two parts, in a ratio of 4:7. What is the product of the lengths of the two parallel
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jonathanxu999
Dec 19, 2017
+1
55
0
+64
The digits 2,4,6,8 and 0
The digits 2,4,6,8 and 0 are used to make five digit numbers with no digit repeated. What is the probability that a number chosen at random for these numbers has the property that the digits in the thousand's place and the ten's place are each larger than
read more ..
jonathanxu999
Dec 19, 2017
+2
81
3
+64
perfect squares
How many different perfect squares are factors of 20072007 ?
A) 2016032
B) 2016031
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jonathanxu999
Dec 9, 2017
+1
134
3
+64
triangle
In right triangle ABC, leg AC is 2 cm and leg BC is 6 cm. A square is constructed of hypotenuse AB, the hypotenuse being one side of the square. What is the distance, in cm, from point C to the intersection point of the two diagonals of the square?
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jonathanxu999
Dec 2, 2017
+1
140
1
+64
Mike the Farmer
Every day Mike leaves his farm at 11:30 a.m. to take a load of potatoes to the chip producers. If he averages 50 km/h he arrives at 1:54 p.m., but if he averages 80 km/h he arrives at 1 p.m. At what speed must he travel to arrive at 12:45 p.m.?
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ElectricPavlov
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jonathanxu999
Dec 2, 2017
+1
92
1
+64
container
A 10cm by 12cm rectangular container contains some water. When a solid metal cube with volume 216cm3 is placed in the water, the water level comes up level with the top of the cube. In cm, what was the original height of the water in the container?
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hectictar
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jonathanxu999
Dec 1, 2017
+1
138
2
+64
Escalator
Mary and John have both completed a trip up an escalator. John took 15 steps on the way up and took 12 seconds to reach the top. Mary took only 7 steps and took 18 seconds to reach the top. How many steps does the escalator have in total?
Melody
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jonathanxu999
Nov 25, 2017
0
173
9
+64
Jogger and Train
A jogger has attempted to run across a railroad bridge but sees a train coming after completing 3/4 of the trip. If the train is traveling at 30km/h, and if it is possible for the jogger to just escape being hit by the train by running at full speed to
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jonathanxu999
Nov 16, 2017
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+64
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thanks
jonathanxu999
Jan 20, 2018