All Questions

462

Help Appreciated

Consider the projection matrix P that satisfies
Pv = Projection of v onto <4 , 1>.
Find 3 vectors with integer components and magnitude no greater than 8 that satisfy Pv = <4 , 1>.
read more ..

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Guest Jul 7, 2019

886

+1712

Ok, I tried doing the problem pls give me a full explanation!

I tried doing it the way the kids would have done it, but I just got confused. Is there a better way to solve this?

Basically writing it out and trying read more ..

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tommarvoloriddle Jul 7, 2019

964

+1712

halpppp

Help! I tried plugging in numbers.... pls help
🙏🙏🙏
- read more ..

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tommarvoloriddle Jul 7, 2019

683

Help

What is the $x$-coordinate of the point on the $x$-axis that is equidistant from points $A( -2, 0)$ and $B(0,4)$?

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Guest Jul 7, 2019

2099

+1712

Counting problem

Alyssa has four marbles: a red one, a blue one, a green one, and a yellow one. In how many different ways can she form a set consisting of some of the marbles if she must choose at least one marble? (In a set of chosen marbles, it does not matter in what read more ..

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tommarvoloriddle Jul 7, 2019

1111

+27

Here is another answer that I need reviewed.

Here is another answer that I need reviewed.

Question:
It takes a machine 3 minutes to fill 20 bottles of soda. At this rate how many minutes will it take the machine to fill 48 bottles of soda? read more ..

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dreamdriven Jul 7, 2019

1120

+26

An easy problem

A number is selected at random from 1 through 100, inclusive. What is the probability that the number is a multiple of three?

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musicalnote Jul 7, 2019

873

Help!

Brenda is going from (-4, 5) to (5,-4) but she needs to stop by the origin on the way. How far does she have to travel?

off-topic

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Guest Jul 7, 2019

Jul 6, 2019

1402

Help!

A triangle has vertices at coordinates (11,1), (2,3) and (3,7). What is the number of units in the length of the longest side of the triangle?

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Guest Jul 6, 2019

683

Help appreciated

The matrices
are inverses

what is xy? read more ..

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Guest Jul 6, 2019

704

than you for the help

Let A and B be invertible matrices such that

A <2 , -1> = <1 , 2> and B <1 , 3> = <2 , -1>.
read more ..

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Guest Jul 6, 2019

1096

+586

help plz

What is the sum of the final three digits of the integer representation of 5^100?

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xXxTenTacion Jul 6, 2019

1191

+586

Number Theory

Find the smallest positive integer n such that 617n= 943n (mod 18)

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xXxTenTacion Jul 6, 2019

1434

+586

Help me

What is the sum of the last two digits of this portion of the Fibonacci Factorial Series: 1!+1!+2!+3!+5!+8!+13!+21!+34!+55!+89! ?

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xXxTenTacion Jul 6, 2019

-1

742

During one month, a grocery store sold 20% more chicken than fish by the pound. If the store sold 3,600 pounds of chicken during this month,

I know the answer is 3000 but I don't know how to do it.
thanks!

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Guest Jul 6, 2019

1873

+53

Write the general solution to y = arcsin (0.9659).

Write the general solution to y = arcsin (0.9659).

Select all that apply:

a. 15°±360°k read more ..

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cormier123 Jul 6, 2019

863

+794

Help needed

help please

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travisio Jul 6, 2019

720

Need some help

Let u, v and w be vectors satisfying

u*v=3, u*w=4, v*w=5.
read more ..

heureka ●

Guest Jul 6, 2019

757

help appreciated

Let A be a matrix and x be a non-zero vector such that A x = 2 x. Then we have that A^7 x = Y x some value of a. What is Y equal to?

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Guest Jul 6, 2019

1486

+27

Please check my answer

During a holiday month a retail store brings in 300% above it's average sales in other months. If a typical month has $1600 in sales, and has fixed cost of $800 per month. What is the profit for a holiday month?

I worked it read more ..

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dreamdriven Jul 6, 2019

926

+1712

earthquake!!!!! ahhhhh

Ok, was it just me or did ALL OF CALIFORNIA FEEL THAT EARTHQUAKE? I slept through it... but that just shook me , "you just slept through a 7.1 earthquake!"

So just curious, how many of you actually felt it?
read more ..

off-topic

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tommarvoloriddle Jul 6, 2019

Jul 5, 2019

1079

+2862

The Use of Math

I have always heard that math is very important in our lives. But I am very curious where it is used. Things like trigonometry and quadratics seem useless, my classmates agree. Why in the world would you need that!

This is why I am read more ..

off-topic

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CalculatorUser Jul 5, 2019

712

Thanks so much for putting time, energy and brain power in helping confused students like me!

An integer x, with 10 <= x <= 99, is to be chosen. If all choices are equally likely, what is the probability that at least one digit of x is a 7?

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Guest Jul 5, 2019

All Questions ⁺⁰230619 Questions

Help Appreciated

Ok, I tried doing the problem pls give me a full explanation!

halpppp

Help

Counting problem

Here is another answer that I need reviewed.

An easy problem

Help!

Help!

Help appreciated

than you for the help

help plz

Number Theory

Help me

During one month, a grocery store sold 20% more chicken than fish by the pound. If the store sold 3,600 pounds of chicken during this month,

Write the general solution to y = arcsin (0.9659).

Help needed

Need some help

help appreciated

Please check my answer

earthquake!!!!! ahhhhh

The Use of Math

Thanks so much for putting time, energy and brain power in helping confused students like me!

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