03/15/19

How many angles does a cube have?
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03/15/19

How do I solve an inequality for x with this problem −12x−2x2>−14−12x−2x2>−14?
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03/14/19

What is the Additive Inverse Property
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03/14/19

What is so special about the 17 sided polygon of Carl Friedrich Gauss?
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03/14/19

GRE Practice Question Incorrect?
This is a sample GRE question. The answer claims that we cannot make an inference due to insufficient information. > *Compare the following quantities:* > > Of the 25 people in Fran’s... more
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03/14/19

A bus has eleven children on it at the beginning of its route. Fourteen get on at the first stop, and twelve get on at the stop after that. How many children are on the bust after the third stop?
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03/14/19

What is the Multiplicative Inverse Property
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03/14/19

How many 2-digit positive integers are there?
How many 2-digit positive integers are there such that the product of their two digits is 24? The answer given is four. I'm not certain if I understand this question correctly and need some... more
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03/14/19

How do I calculate the normal vector of a line segment?
Suppose I have a line segment going from (x1,y1) to (x2,y2). How do I calculate the normal vector perpendicular to the line? I can find lots of stuff about doing this for planes in 3D, but no 2D... more
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03/14/19

How do you determine the dimensions of a matrix?
Determine the dimensions of the matrix2355
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03/14/19

Aunt and Uncle's fuel oil tank dip stick problem?
This problem first came to me in high school, and a couple times since, and I even assigned it for extra credit in one of my calculus classes after I became a teacher. So I know the solution. What... more
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03/14/19

Do "other" trigonometric functions than Tan Sin Cos and their derivatives exist?
I remember my physics teacher mentioning that other trigonometric functions exist apart from the Sin Cos and Tan, he mentioned a few and they did not sound familiar, nothing like Sec Csc and Cot. I... more
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03/13/19

When can you use a triangle to represent trig substitution?
I apologize if this seems like a newbie question but it's been really messing with my head. I'm reading about using trig substitution in integration and everyone seems to simply construct a right... more
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03/13/19

What is the Commutative Property of Multiplication
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03/13/19

If 1700 is the 2.2% of something, how much is the total?
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03/13/19

In Riemann’s sum, how did he accurately measure the height and width of the rectangles to determine the approximation of the definite integral under a curve?
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03/13/19

Area between two longitudes?
I am trying to compute the area between two longitudes (using the angle between them) but am having a hard time. I can do that more easily between latitudes but longitude reveals to be... more
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03/13/19

Why is the average rate isn't the average of the two rates given for the two legs of the journey?
If an object moves the same distance twice, but at different rates, then the average rate will never be an average of the two rates given for the two legs of the journey. Why is that so?
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03/13/19

The volume of a cube is V=8. Find the length of one of its sides.
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03/13/19

How do I find the probability of these independent events?
The following is taken from the ETS math review for the GRE: Let A, B, C, and D be events for which P(A or B)=0.6, P(A)=0.2, P(C or D)=0.6, and P(C)=0.5 The events A and B are mutually exclusive,... more
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03/13/19

The product of 5 and a number is 18 more than twice the number.
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03/13/19

If B’s father is A, B is the son of C and D is A’s mother, then how is C related to D?
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03/12/19

There are 50 coins in all. All of the coins, 12% are pennies and 34% are dimes. There are two more nickels than pennies. How much money does the bag contain?

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03/12/19

The population of a southern city follows the exponential law. If the population doubled in size over 10 months and the current population is 60 000​, what will the population be 2 years from​ now?
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03/12/19

The perimeter of a 6-sided figure is 30 feet. The length of each side is (x + 1) feet. What is the value of x?
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