All Questions ⁺⁰237665 Questions

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How many mph to keep a hovercraft afloat?

Hi, so I'm planning on building a hovercraft that's 4 ft in diameter and can hold up to approximately 250 lb. I've calculated it to need a little over 838 pa to stay afloat, but I'm stuck on how strong of a leafblower (the engine) I need. read more ..

Guest Jul 31, 2018

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682

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If f(x)=x^5-1/3, find f^-1(-31/96).

If f(x)=x^5-1/3, find f^-1(-31/96).

Guest Jul 31, 2018

+5

1013

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+94

Help ASAP please!

A bag contains some marbles, each of which is one of four colors (red, white, blue, and green). There is at least one of each color. The composition of the bag is such that if we take four marbles out at random (without replacement), each of the following read more ..

iamdaone Jul 31, 2018

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633

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Please help as soon as possible

The polynomial $f(x)$ has degree 3. If $f(-1) = 15$, $f(0)= 0$, $f(1) = -5$, and $f(2) = 12$, then what are the $x$-intercepts of the graph of $f$?

Guest Jul 31, 2018

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812

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How to solve this parabolic problem?

Here's the question:

read more ..

Guest Jul 31, 2018

Jul 30, 2018

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489

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help me please

"Modulo m graph paper" consists of a grid of m^2 points, representing all pairs of integer residues (x,y) where 0 < x < m. To graph a congruence on modulo m graph paper, we mark every point (x,y) that satisfies the congruence. read more ..

Guest Jul 30, 2018

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486

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Let n be a positive integer. If a == (3^{2n}+4)^-1 mod(9), what is the remainder when a is divided by 9?

Let n be a positive integer. If a == (3^{2n}+4)^-1 mod(9), what is the remainder when a is divided by 9?

Guest Jul 30, 2018

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1314

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+279

Number Theory Help Please!

1. Find all residues $a$ such that $a$ is its own inverse modulo $317$.
(Your answer should be a list of integers greater than 0 and less than $317$ separated by commas.)

2. The inverse of $a$ modulo 39 is $b$. What read more ..

yasbib555 Jul 30, 2018

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438

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HELP

I really need help with the polynomial problem I just posted rn. If you are working on it, please send me a message telling me so I don’t freak out. Haha thx.

Guest Jul 30, 2018

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715

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Polynomial

The polynomial f(x) has degree 3 if f(-1)=15, f(0)=0, f(1)=-5, f(2)=12, then what are the x-intercepts of the graph of f?

Guest Jul 30, 2018

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2129

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Exponential word problem: Please Help

I need help figuring out how to set this word problem up and to solve it:

A delivery truck is purchased new for $54,000.
a. Write a linear function of the form y = mt + b to represent the value y of the vehicle read more ..

Guest Jul 30, 2018

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616

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Algebra graph problem

What is the sum of all numbers for which the graph of and the graph of intersect one time?
Thanks in advance!

Guest Jul 30, 2018

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