All Questions ⁺⁰230591 Questions

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Let x and y be real numbers whose absolute values are different and that satisfy

Let x and y be real numbers whose absolute values are different and that satisfy

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AnonymousConfusedGuy Jan 21, 2018

+1

1323

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+205

School

Sam left his school at 3:05. He walked at a speed of 3.2 mph. 15 minutes later, Al started running after him, and he caught up with Sam 10 minutes later. What was Al’s speed?

joebob Jan 21, 2018

0

477

1

Taylor Series for Sine

It is a well-known fact that the sine of x can be calculated very rapidly and accurately using the famous Taylor series: Sin(x) =x - x^3/3! + x^5/5! - x^7/7! + x^9/9! - x^11/11!.....etc. But x must be in radians. But suppose x was in degrees, what would read more ..

Guest Jan 21, 2018

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1936

2

Help

Find all values of $c$ such that $\dfrac{c}{c-5} = \dfrac{4}{c-4}$. If you find more than one solution, then list the solutions you find separated by commas.

Guest Jan 21, 2018

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2523

1

Help asap

Find all real values of $x$ that satisfy the equation $(x^2 - 82)^2 = 324$. If you find more than one, then list your values in increasing order, separated by commas.

Guest Jan 21, 2018

+1

1100

3

+113

Catalan sequence

In a 6 by 6 grid, how many pathways can be drawn from S to F, S is the top left corner and F is the bottom right corner (always moving to the right or down) that cross the main diagonal at least once? (You can use the Catalan sequence for this question, read more ..

jonathanxu999 Jan 21, 2018

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913

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write an equation of an ellipse where

write an equation of an ellipse where
the foci are at (1,-1) and (1,5) and the ellipse passes through (4,2) ???

ElectricPavlov ●●

Guest Jan 21, 2018

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694

2

+4

help??

what multiplies to be 40 and adds up to be -18??

mona87 Jan 21, 2018

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654

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equation of circle

find standard form of equation and graph of circle where:
center at (3,-2) and tangent to y = 2

Guest Jan 21, 2018

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914

1

Help on the question please

If m is a real number and 2x^2+mx+8 has two distinct real roots, then what are the possible values of m? Express your answer in interval notation. Thanks

Guest Jan 21, 2018

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727

2

Momentum and Collisions - Physics Question Help Please.

I'm sorry if this is the wrong place to post, but I am in urgent need of some physics help. Hopefully there are physicists in this forum that can help me out. Any help would be much appreciated!
1) Two football players of masses m and M are involved read more ..

Guest Jan 21, 2018

Jan 20, 2018

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1567

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+58

I figured out my own question and here's how below

Some time ago, a country's government obligated $30.5 billion in foreign economic assistance. The entire budget was $3.8 trillion. Estimate the percentage of the budget spent on foreign economic assistance by rounding the foreign economic assistance budget read more ..

ElectricPavlov ●●

motorcycle2008 Jan 20, 2018

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794

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+58

I think I know how to answer working on now

A few years ago, a country consumed 18,900,000 barrels of oil per day. That same year, there were about 314,000,000 people in that country. A barrel of oil is 42 U.S. gallons. Estimate how many gallons each person in the country consumed each day that year read more ..

motorcycle2008 Jan 20, 2018

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2896

7

+58

Math Question do not solve the question point me in the right direction

As of early 2014, the world's population was about 7.2 billion people. The population of the United States was 317 million.
The area of New York City is 305 square miles. If in early 2014 every person in the world moved into New York City, how many square read more ..

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motorcycle2008 Jan 20, 2018

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2297

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+58

Math question on Oil

It is estimated that in 2009 the United States consumed 18.69 million barrels of oil a day. A barrel of oil is 42 U.S. gallons. Assuming a U.S. population of 306 million, estimate per capita consumption in gallons, rounding each number.

motorcycle2008 Jan 20, 2018

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1292

1

+58

How many blogs will be set up in one month (30 days)?

The number of blogs has grown rapidly. Assuming that two new blogs are created each second, how many blogs will be set up in one month (30 days)?

motorcycle2008 Jan 20, 2018

-1

888

1

+58

Math question

Light travels at 186,000 miles per second. How
many FEET does it travel in a microsecond? (A microsecond is a millionth of a second.)

motorcycle2008 Jan 20, 2018

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3139

4

+115

In square $ABCD$, $E$ is the midpoint of $\overline{BC}$, and $F$ is the midpoint of $\overline{CD}$. Let $G$ be the intersection of $\overl

In square ABCD, E is the midpoint of line BC, and F is the midpoint of line CD. Let G be the intersection of line AE and line BF. Prove that DG = AB.

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MIRB14 Jan 20, 2018

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908

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+1438

help

How many times does the digit 9 appear in the list of all integers from 1 to 500?

SmartMathMan Jan 20, 2018

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1807

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+593

What is the quadratic regression equation for the data set?

What is the quadratic regression equation for the data set?

yˆ= −1.225x2 +88x +1697.376
yˆ= 1.225x2 +88x +1697.376 read more ..

jbouyer Jan 20, 2018

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1632

1

+593

Help please.

The equation y=−3.5x2−0.5x+65 models the height of a ball in inches for each bounce.
What is the best approximate for the height of the ball after the 3rd bounce?

7 in. read more ..

jbouyer Jan 20, 2018

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1702

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+593

What is the quadratic regression equation for the data set?

What is the quadratic regression equation for the data set?
yˆ= 0.032x2 − 0.601x −0.255
yˆ= 0.032x2 + 0.601x −0.255
yˆ= 0.032x2 − 0.601x read more ..

jbouyer Jan 20, 2018

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