Steven G.

03/19/19

How many pounds of jelly beans

Amelia bought 6 bags of jelly beans. Each bag had 3/4 pounds of jelly beans. How many pounds of jelly beans did amelia have?

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Prealgebra

03/19/19

Subtract minus divide plus X

George George is at the hardware store buying ropes for a project he needs 108 in of rope for his project how many yards of rope does George need to buy to equal 108 in

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Prealgebra Word Problems

03/19/19

Can you help me with this word problem please?

At a local fitness center members pay a $14 membership fee and $3 for each aerobics class nonmembers pay $4 for each aerobics class for one number of aerobics classes will the cost for members... more

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Precalculus

03/19/19

Consider a function f:R→Rf:R→R defined by f(x)=x2f(x)=x2. How does one show that ff is neither injective nor surjective?

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Prealgebra Number Theory Prime Factorization

03/19/19

Numbers that are the sum of the squares of their prime factors?

A number which is equal to the sum of the squares of its prime factors with multiplicity: - $16=2^2+2^2+2^2+2^2$ - $27=3^2+3^2+3^2$ Are these the only two such numbers to exist? There has to be... more

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Calculus Trigonometry

03/19/19

Intuitive understanding of the derivatives of $\\sin x$ and $\\cos x$?

One of the first things ever taught in a differential calculus class: - The derivative of $\\sin x$ is $\\cos x$. - The derivative of $\\cos x$ is $-\\sin x$. This leads to a rather neat (and... more

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Algebra 1

03/19/19

Ho do I maximize x = 3a + b + 2c?

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Precalculus

03/19/19

How do you find (12+3√i2)15(12+3i2)15 using math up to precalculus, without Euler’s formula?

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Prealgebra

03/19/19

If it takes 9 hours for 4 people to build a shed, how many people are needed to build the same type of shed in one-third of the time?

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Algebra 1

03/19/19

A woman bought a number of items for $40. She realized that if she had bought 5 more items for the same money, she would have paid $4 less per item. How many items did she buy?

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Algebra 1

03/19/19

A woman bought a number of items for $40. She realized that if she had bought 5 more items for the same money, she would have paid $4 less per item. How many items did she buy?

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Sat Math

03/19/19

Help me with math

I don't understand the whole i=root -1 thingy!!help

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Algebra 1

03/19/19

Y is greater than 2x. How do graph that

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Sat Math

03/19/19

Avoiding silly mistakes on math

Hi! With less than two weeks left im focusing mostly on math section of the SAT. I feel confident with reading/writing but not as confident with math. I feel like i make so many dumb mistakes,... more

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Algebra 2 Gre Gre Exam

03/19/19

If a = 3 + b, which of the following is true?

(I) a > b + 2.5 (II) a < b + 2.5 (III) a > 2 + b (A) I only (B) II only (C) III only (D) I and II only (E) I and III only The given answer is (A), (C), and (D). How come? My... more

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Math Algebra 1 Algebra

03/18/19

Find three consecutive positive integers such that the product of the larger two is equal to twice the second integer plus twice the sum of all three integers.

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Calculus Probability Mean

03/18/19

Let f(x) = k(9x − x^2) if 0 ≤ x ≤ 9

Let f(x) = k(9x − x2) if 0 ≤ x ≤ 9 and f(x) = 0 if x < 0 or x > 9.(a) For what value of k is f a probability density function? k= ?(b) For that value of k, find P(X > 1). P(X > 1) =... more

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Algebra 1 Distance

03/17/19