All Questions

771

A collection of nickels, dimes, and quarters is worth 5.30.

A collection of nickels, dimes, and quarters is worth 5.30. There are two more dimes than nickels and four more quarters than dimes. How many quarters were in the collection?

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Guest Jan 16, 2019

2101

help

Mary has six cards whose front sides show the numbers 1,2,3,4,5and 6 . She turns the cards face-down, shuffles the cards until their order is random, then pulls the top two cards off the deck. What is the probability that at least one of those read more ..

CPhill ●●●●

Guest Jan 16, 2019

1081

+63

Piecewise functions question

Let

Find k(x) such that f is its own inverse.

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vindou Jan 16, 2019

703

help

Meyer rolls two fair, ordinary dice with the numbers on their sides. What is the probability that at least one of the dice shows a square number?

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Guest Jan 16, 2019

782

+322

Calculus

just started calc so get ready for some calculus questions

off-topic

Ruublrr Jan 16, 2019

1620

Trig help pls

A regular hexagon has vertices at $1-i, 0, a, b, c, d$ clockwise in that order, as in the picture below:

Then what is ? read more ..

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Guest Jan 16, 2019

966

+62

Complementary Counting Challenge:

There is an n by n square with n^2 unit squares. How many ways can we put numbers from 1 to n^2 on the grid such that the numbers from left to right and top to bottom go from least to greatest?

What if the grid is a n by n by n Cube? read more ..

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TwentyFour Jan 16, 2019

710

Equation

I really need help with this problem!

While on a walk in the country, you pass a field full of horses and chickens. After a quick count, you determine there are 3232 heads and 9090 feet in the field. How many of each animal are there? read more ..

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Guest Jan 16, 2019

2670

15 liters increased by 60% is how many liters

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Guest Jan 16, 2019

778

please help!

In terms of pi, what is the area of the circle defined by the equation 2x^2 + 2y^2 + 10x - 6y - 18 = 0?

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Guest Jan 16, 2019

Jan 15, 2019

890

+257

th1b prob4

Geometric proofs..... I have no experience with this, help please if you can.

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SydSu22 Jan 15, 2019

621

Find F and G

Find F and g

Omi67 ●

Botto Jan 15, 2019

694

In the triangle formed by points A(-1,7), B(1,2), and C(7,6), what is the slope of the line that goes through point A and bisects BC?

asdf335 ●●

Guest Jan 15, 2019

692

deviations

Scores on a college entrance examination are normally distributed with a mean of 500 and a standard deviation of 100. What percent of people who write this exam obtain scores between 425 and 575?
a. 27.34%
b. 45.32%
c. 54.68%
d. 77.34% read more ..

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Guest Jan 15, 2019

841

math help

https://snag.gy/9hbUSc.jpg
A note is played on a flute. Which of the parts of the wave would be affected by playing a higher pitch note and how?
A) D, the frequency would get higher.
B) C, the wavelength would get shorter.
C) C and D, the amplitude read more ..

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Guest Jan 15, 2019

613

Does anyone know what 'x=' for the equation

Does anyone know what "x=" for the equation
2/3(3x+9)=-2(2x+6)

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Guest Jan 15, 2019

1017

Can anyone do this?

The same eight people sit in a certain church pew every week, but not always in the same order. Every week, each person hugs the people immediately to his or her left and right. How many weeks does it take (at a minimum) for every pair of people to hug read more ..

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Guest Jan 15, 2019

975

+146

Help me

Will someone please explain the basics of algebra?

off-topic

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FreddieMercury Jan 15, 2019

1076

How many terms are in the arithmetic sequence

How many terms are in the arithmetic sequence 5, 1, −3, . . . , −111?
Hint: an = a1 + d(n − 1), where a1 is the first term and d is the common difference.

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Guest Jan 15, 2019

2473

Tom throws a ball into the air. The ball travels on a parabolic path represented by the equation h = -8t 2 + 40t, where h represen

Tom throws a ball into the air. The ball travels on a parabolic path represented by the equation h = -8t 2 + 40t, where h represents the height of the ball above the ground and t represents the time in seconds. The read more ..

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Guest Jan 15, 2019

578

I need help please help?

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Guest Jan 15, 2019

575

I need help with a problem can someone help me?

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Guest Jan 15, 2019

671

Please Help Me!

A suitcase lock has 3 dials with the digits 0,1,2,3....,9 on each. How many different settings are possible if all three digits have to be different?

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Guest Jan 15, 2019

1357

Math

Ellen wants to purchase a book that is regularly priced at $18. The book is discounted 15%. She also needs to pay a 6% sales tax on the discounted price.
What is the total amount Ellen will pay for the book?

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Guest Jan 15, 2019

556

my homework question pls help

a group of respiring woodlice produce 4.37cm^3 of CO2 in 1 hour. Calculate their mean rate of CO2 production per minute. Give your answer to 2 significant figures

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Guest Jan 15, 2019

All Questions ⁺⁰237722 Questions

A collection of nickels, dimes, and quarters is worth 5.30.

help

Piecewise functions question

help

Calculus

Trig help pls

Complementary Counting Challenge:

Equation

15 liters increased by 60% is how many liters

please help!

th1b prob4

Find F and G

In the triangle formed by points A(-1,7), B(1,2), and C(7,6), what is the slope of the line that goes through point A and bisects BC?

deviations

math help

Does anyone know what 'x=' for the equation

Can anyone do this?

Help me

How many terms are in the arithmetic sequence

Tom throws a ball into the air. The ball travels on a parabolic path represented by the equation h = -8t 2 + 40t, where h represen

I need help please help?

I need help with a problem can someone help me?

Please Help Me!

Math

my homework question pls help

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