Monday

July 28, 2014

July 28, 2014

Total # Posts: 1,166

**Math**

In this problem: 5/12b + 15/36b^2 First I made a common denominator: 15b/36b^2 + 15/36b^2 Then I simplified the first fraction: 5/12b + 15/36b^2 Can I simplify the second fraction by 3b? If I can, what am I supposed to get?

**Math**

Are you sure it isn't 10b?

**Math**

In (8b+2b^3)/(b-1), Do you have to put a zero coefficient in it?

**Math**

Which ordered pair is a solution of the system of equations y=x^2-x-20 and y=3x-15? a. (-5,-30) b. (-1,-18) c. (0,5) d. (5,-1) When I solved the system of equations I got 5 and -1. What do I do next?

**Math**

How do you do this, I keep on getting 3.. There is a right triangle. One angle is 30 degrees. The hypotenuse is 24. What is the value of x, the adjacent, to the nearest whole number? a. 12 b. 14 c. 21 d. 28

**Math**

Thanks

**Math**

What is an equation of the line that passes through the points (3,-3) and (-3,-3)? how do you figure this out: a. y=3 b. x=-3 c. y=-3 d. x=y

**Math**

I used an online graphing calculator..so maybe it's different like that?

**Math**

thanks

**Math**

Suppose Triangle ABC has right angle C. Find the measures of the other sides to the nearest whole number if...? the measure of angle A is 32 degrees, and the measure of AB is 42. For one side, I got 23, and for the other side, I got 35. Am I right?

**Literacy**

thanks

**Literacy**

Does flowering and blooming rhyme?

**Math**

thanks

**Math**

How do you simplify 5-4n/4n-5?

**Math**

thanks

**Math**

How do you factor 2x^2+2x?

**Math**

i meant the first instance. thanks

**Math**

Can you simplify 15 sqrt3 / 3 into 5 sqrt 3? why or why not?

**French**

How do you say the country Zaire in French?

**Math**

Simplify - sqrt 12b^2 * 2 sqrt 8b. I got -8 sqrt 6

**Science**

thanks

**Science**

I don't know..I think it's supposed to be switched in the southern hemisphere, so december?

**Science**

Why is it that in late August, the amout of sea ice surrounding the continent of Antarctica approaches its greatest extent? And why is it that in February, the sea ice surrounding Anarctica is at it's minimum extent?

**French**

oh, I forgot all about that..thank you!

**French**

in this: Question: ¨¤ qui aimes-tu rendre visite? Response: J'amie rends visite ¨¤ ma cousine. So my mistake was that it was supposed to be rendre, but I don't understand why..aren't you supposed to conjugate it to rends?

**Math**

thanks

**Math**

There's a right triangle. There's an angle that measures 41 degrees. The hypotenuse is x, and the angle opposite 41 degrees measures 25 in length. How can I find what x is? The proportion set up is 25/x, but how do you solve for x?

**science**

is able to change shape. this requires energy

**Math**

50. If you take half of 50, it's 25.

**French**

are you sure? This question was on a quiz I took, and my teacher circled rends and took off a point..

**French**

No, that was a typo. I meant to say J'aime. and both question marks are a with an accent grave.

**French**

What's wrong with my response in this: Question: À qui aimes-tu rendre visite? Response: J'amie rends visite à ma cousine.

**Math**

how does sqrt 18=3sqrt2?

**Math**

¡Ì means sqrt. Simplify (2¡Ì6+3¡Ì3)(¡Ì6-5¡Ì3) I got 15¡Ì2 -45.

**Math**

Another painting has length : width ratio approximately equal to the golden ratio (1 + sqrt 5) : 2. Find the length of the painting if the width is 34 inches.

**Math**

A firefighter is on the fifth floor of an office building. She needs to throw a rope into the wiindow above her on the seventh floor. The function h=-16t^2+36t models how high above her she is able to throw a rope. If she needs to throw the rope 40 ft above her to reach the se...

**Science**

thanks

**Science**

Why can there only be a solar eclipse with a new moon, not a full moon?

**Science**

thanks

**Science**

Is there another website? May 15th isn't on there..

**Science**

Is there any website that can tell me what the phase of the moon will be on May 15th?

**Science**

thanks

**Science**

what is the earth's time system based on? I think it's time zones..

**Math**

how did you get (10/12) sqrt 3?

**Math**

How do you simplify 5/¡Ì12? I know you have to multiply the denominator,¡Ì12, by a radical to make a perfect square.. I think you're supposed to multiply it by 12? But there seems to be other numbers multiplied by 12 that can make a perfect square...

**Math**

how do you solve this system? I'm using substitution.. y=3x+4 y=-x^2 First I combined it: -x^2=3x+4 I don't know how to solve it now..

**Math**

how many solutions are in this system: y=x^2+2x+5 y=-2x+1 I'm not sure, but I got no solutions.

**French**

do you know why I shouldn't include the ¨¤? and why the que shouldn't be there?

**French**

Question: Pendant que les vacances, ¨¤ qui rends-tu visite? My response: Pendant que les vacances, je rends visite ¨¤ ma grand-m¨¨re. am i right? i'm confused as whether or not i'm supposed to put the ¨¤ after visite.

**Math**

would i still get it right if i didn't factor out the gcf?

**Math**

on a test, if i put one of the answers i put above, would i still get it right?

**Math**

What do you get when you factor 2q^2+22q=-60? Is there more than one answer possible? I got 2 answers: 1. (2q+10)(q+6) 2. (2q+12)(q+5)

**French**

like you can't say "Le restaurant le plus bon est...",but you can say "Le restaurant le moins bon est...".

**French**

Why do you have to replace plus bon ina sentence with meilleur, but not when you're using moins bon?

**Math**

How did you get (3q + 1)(q +1) = 0? What happened to the 15?

**Math**

What are you supposed to get when you factor 3q^2+16q=-5? I got (q+3)(3q+1)

**Science**

ok thanks

**Science**

What time of day is hotter, 12 noon or 2pm? I know it's 2pm from experience, but I don't know why it's like that..

**Math**

thanks

**Math**

A math class has 25 students. There are 13 students who are only in the band, 4 students who are only on the swimming team, and 5 students who are in both groups. How many students are not in either group? I think it's 3 students?

**French**

thank you

**French**

is this correct too? this is what i ended up writing: La matière la plus utile est les sciences.

**French**

In French, how do you say "The ost useful subject is science? I need to know how to say the science part..is it plural, like math, and is it masculine or feminine?

**French**

thanks

**French**

yeah, that's the one! i remember now thanks

**French**

is there another way?

**French**

how do you say "subject" in french? I think there's one way to say it that starts with an m?

**Math**

the ways above is probably easier, but my teacher probably wants me to solve it by factoring..

**Math**

The sides of a square are all increased by 3 cm. The area of the new square s 64 cm^2. How can you find the length of a side of the original square?

**Math**

ok thanks..

**Math**

how do you factor 4x^2-35x-9=0?

**Science**

thank you!

**Science**

When it's winter in the northern hemisphere, it's summer in the southern hemisphere. So, if it's April in the northern hemisphere, is it still April in the southern hemisphere?

**Science**

If Earth's axis had no tilt, we'd only have spring and fall for seasons, right? But which hemisphere would get the vernal equinox and which would get the autumnal?

**Math**

I don't think there is any factor that can be multipl;ied by 2 to get -7..

**Math**

how do you factor 2c^2-7c=-5? I know that you have to change it to 2c^2-7c+5=0. Then you do this: (2c )(c ). But how do I find the two numbers? I can't think of one that works..

**Math**

thank you

**Math**

Mike and Kim invest $8,000 in equipment to print yearbooks for schools. each yearbook costs $5 to print and sells for $25. How many yearbooks must they sell before their business breaks even? a. 1,600 b. 400 c. 320 d. 600 I know the answer is b, but I don't know how you ge...

**Math**

thank you

**Math**

How can you match a parabola to it's graph? I know that in y=ax^2+bx+c, the a tells you if it opens upwards or downwards, and the c tells you the y-intercept..is there anything else?

**Math**

Never mind, I got it.

**Math**

I'm graphing the parabola f(x)=x^2+2. I'm going to make a table of values, and I'm choosing 5 values. How do I know which value I should choose as my 3rd value so I can make the parabola symmetrical?

**math**

copy and complete input-output table for the function y=2x - 5

**Math**

never mind, i get it, i wasn't supposed to solve any equations at all..

**Math**

Suppose you buy flour and cornmeal in bulk to make flour tortillas and corn tortillas. Flour costs $1.50/lb. Cornmeal costs $2.50/lb. You want to spend less than $9.50 on flour and cornmeal, and you need at least 4 lb altogether. Write a system of inequalities that describes t...

**science**

oh, so it's d. cuz only plants do that..thanks

**science**

I don't know..

**science**

all of the following are life functions of animals except? a. obtaining energy from food b. responding to changes in the environment c. production of new individuals d. synthesizing food from carbon dioxide and water I think it's b.

**science**

what would make it sink halfway down?

**science**

thanks, but can you explain my second question?

**science**

why doesn't density depend on size? If you cut a block in half, and put it in water, wouldn't the density change because I think half a block wouldn't sink all the way in water?

**Math**

i get it..thanks!

**Math**

You have a total of 21 coins, all nickels and dimes. The total value is $1.70. Write and solve a system of equations to find the number of dimes d and the number of nickels n that you have. I already wrote the equations: n+d=21 and 10d+5n=1.70. But I don't know how to solv...

**8th grade Algebra**

how u get -b?

**History**

Maybe another thing could be that it costs a lot of money for all the weapons?

**Algebra**

12+6x<30+4x+8 6x-4x<38-12 2x<26 x<13

**Science**

How much of a radioactive material with a half-life of 12,000 years is left after 36,000 years of decay?

**Science**

thanks

**Science**

for the most of the Jurassic Period, were there coral reefs?

**Science**

there are 6: lever, inclined plane, wheel and axle, screw, wedge, and pulley

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