Wednesday

February 22, 2017
Total # Posts: 947

**Sequence and series**

Do you know the difference between a sequence and a series? Graph the terms of an arithmetic series. Remember the domain is the set of natural numbers, not the set of real numbers. What type function do you see? Graph the terms of a geometric series. Remember the domain is the...

*April 21, 2007*

**Algebra**

2 divided by 5w+ 10, minus 3 divided by2w-4 2/(5w +10) - 3/(2w-4) ? That can be rewritten with a common denominator. (2/5)/(w+2) - (3/2)/(w-2) = [(2/5)(w-2) - (3/2)(w+2)]/(w^2-1) = [(-11/10)w - (19/5)]/(w^2-1) But it doesn't look any simpler that way.

*April 20, 2007*

**Algebra**

If the sides of of a square are decreased by 2cm, the area is decreased by 36cm square. What are the dimensions of the original square? original square: x by x new square: x-2 by x-2 old area = x^2 new area = (x-2)^2 The difference in these area = 36 difference means subtract...

*April 11, 2007*

**Algebra**

Can you pleas Solve the quadric equation step by step 4x square =13x+2 4x^2 = 13x + 2 subtract 13x and 2 from both sides 4x^2 - 13x - 2 = 0 Now use the quadratic formula, since it does not factor.

*April 11, 2007*

**ALGEBRA**

THE AEA OF A RECTANGLE OF LEGNTH X IS GIVEN BY 3X SQUARE +5X. fIND THE WIDTH OF THE RECTANGLE. The width is the area divided by the length, or in this case (3x^2 +5x)/x = 3x +5

*April 9, 2007*

**Algebra**

I need a step by step explanation of finding the GCF of (6ysquare -3y)(y+7) The greatest common factor, or GCF, is the greatest factor that divides two numbers. ... If there are no common factors, the GCF is 1. That is the situation on your case. 6y^2 -3y and y+7 do not have ...

*April 9, 2007*

**Statistics**

3 students will represent your school at a conference at the state capital. A drawing will be held to select the 3 representatives from a group of 5 finalsts. If you and your friend are both finalists, what are the chances that both of your names will be drawn? Is it 2 out of ...

*March 28, 2007*

**Algerbra**

how do you solve 7(3x+4)=8(2x+5)+13 expand the parenthesis...I will do the left side.. 21x + 29= Now, subtract sixteen x from both sides, and subtract 28 from both sides. I will be happy to check your work. 7(3x+4)=8(2x+5)+13 21x + 29 is 7 times 4 28? 21x+ 28= 16x+40+13 21x+28...

*March 26, 2007*

**algebra**

solve by substitution 3x-y = -7 x+y = -9 Substitute 3x+7 for y in the second equation, and solve the resulting equation for x.

*March 25, 2007*

**algebra**

I invest $14,000, part is 15% and part is 2% if the total interest at the end of the year is $1060, how much did I invest at 15% I think you mean that part (let'say x) earns 15% and the rest earns 2% Solve thes two equations simultaneously: x + y = 14,000 0.15 x + 0.02 y...

*March 25, 2007*

**Algebra**

how would f(x)=-2+-3 look like on a graph I assume you made a typo, and you meant to type f(x)=-2x+(-3) or f(x)=-2x-3 that would be a straight line with a y-intercept of -3 and a slope of -2

*March 25, 2007*

**Algebra**

Wrtie an equation of a line passing through (6,10) and (6,-6 y= mx + b Put in the first set of points: 10=6m + b Do the same for the second point. Then, you have two equations, two unknowns. Solve by substitution.

*March 25, 2007*

**Math**

Rose's garden is in the shape of a trapezoid. If the height of the trapezoid is 16m, one base is 20m and the area is 224m2, what is the length of the other base? The area of a trapezoid is: A= (1/2) h (b1 + b2) ...where h = height and b1, b2 are the bases. Substitute what ...

*March 23, 2007*

**math**

Rose's garden is in the shape of a trapezoid. The ht is 16m one base is 20m and the area is 224m2 find the length of the other base 290m2

*March 22, 2007*

**algebra**

When I subsitute 5x+3 into the equation I get x=1/5 and y=2 is this correct? Try plugging in your final values for x and y into both of the original equations. If and only if the equations are true, then your answers are correct.

*March 20, 2007*

**algebra**

5x-2y=-5 y-5x=3 substitution Substitute 5x +3 for y in the first equation, then solve it for x. Substitute 5x +3 for y in the first equation, then solve it for x. When I subsitute 5x+3 into the equation I get x=1/5 and y=2 is this correct? You are close! Try x = -1/5 (y is ...

*March 20, 2007*

**algebra**

I have beans that sell for $9 per pound and $12 per pound, they need to be mixed to create 100lbs of mixture that will sell for $11.25 per pound . How much of each type of bean should be used in the mixture? X=#lbs beans that sell for $9.00/lb. Y=#lbs beans that see for $12.00...

*March 20, 2007*

**Algebra**

please solve x+5y=10 -2x-10y=-20 Since the second equation can be obtained from the first (by multiplying both sides by -2), they are not independent and there is no unique solution. There are an infinite number of x,y combinations that are solutions.

*March 20, 2007*

**algebra**

I need a step by step explanation on how to add these two equations 2x+3y=1 5x+3y=16 Subtract the first equation from the second. (Subtract left and right sides separately). This gives you 3x = 15 Then divide both sides by 3. x = 5 Pretty easy, huh? After you have x, you can ...

*March 20, 2007*

**Algebra**

Rewrite the equation as a function -3x+4y=11 If you want to consider y as a function of x, then y = (1/4)(3x +11) One can also write x as a function of y. x = (1/3)(4y - 11)

*March 16, 2007*

**Algebra**

If you descend 1800 ft in elevation by the time you are 3.25 mi horizontally away from the top of a mountain, what would be the slope to the nearest hundreth. Slope= change in altitude/horizontal distance. change the miles unit to feet.

*March 7, 2007*

**Algebra**

I need an equation for L that satisfies the given geometric condition. L has a y intercept (0,3) and is parallel to the equation y = 2/3x+1 Please take me step by step so I can understand. Thank you well they would have the same slope 2/3x except this line has a y intercept of...

*March 7, 2007*

**Algebra**

what is the equation of a line that passes through point (0,-9) with a slope of 6 (y - (-9))/(x - 0) = 6 (y+9)/x = 6 y = __ x + ___

*March 5, 2007*

**Algebra**

write the equation of line passing through (6,-10)and (6,-6) I notice that as x is constant, y changes, so it must be a vertical line. x=6

*March 5, 2007*

**algebra**

I have a trapezoid where the height is 16m, the base is 20m,and the area is 224m squared. what is the legnth of the other base http://www.mathgoodies.com/lessons/vol1/area_trapezoid.html The area is equal to the height times the average of the bases. Since the Area is 224 and ...

*February 16, 2007*

**algebra**

I made a mistake in my problem . can you take me step by step on how to solve this problem 2x+3y=6 (forx) 2x+3y=6 (forx) (subtract 3y to both sides) 2x=6-3y (divide both sides by 2) x=3-3/2y This what I got.

*February 16, 2007*

**Algebra**

Need help with this problem, 2x+y=6 solve for y 2x+y=6 subtract 2x from both sides. 2x-2x+y=6-2x combine terms y=6-2x

*February 16, 2007*

**discrete mathematics**

Prove that a square of an integer ends with a 0, 1, 4, 5 6 or 9. (Hint: let n = 10k+c, where c = 0, 1, …,9)

*January 22, 2007*

**math check please**

Approximately 4 out of every 10 students at Sonia's college live on campus. The college has 3,000 students. 1. How many of them live on campus? A 1,200 students 2. Write the proportion 21 is to 33 as 63 is to 99. A. 21/33 =63/99 3. is this fraction proportional? 3/11=7/19 ...

*January 18, 2007*

**math check please**

would some please check this for me. An important fact to consider is that a person needs to burn off 3,500 calories to lose 1 pound. The following table shows the number of calories burned per hour (cal/h) for a variety of activities, where the figures are based on a 150-...

*January 8, 2007*

**math check please**

the ratio of 5 3/5 to 2 1/10 18/5 divid by 21/10 18/5 x 10/21 6/1 X 2/7 12/7=12:7 could some one tell me if this is correct ? yes. the ratio of 5 3/5 to 2 1/10 Would you take a look at this? I think 5 3/5 = 28/5 and not 18/5. how do you make a divide sighn on the computer?

*January 7, 2007*

**Algebra**

mercedes is 2 years old mario is 34 years old

*December 23, 2006*

**math**

what is noncoplanar points The are not in the same plane.

*December 18, 2006*

**MATH**

im so stupid, uhh whats 1 plus 1 is it 11? I'm sorry--that was not me. I am trying to get some help understanding the problems. I am not stupid. 1 + 1 = 2 1 + 10 = 11 And I guess we could make a joke about 1 + 1 being 11 if we were so inclined. Someone getting smart alecky...

*December 17, 2006*

**MATH**

I NEED TO SOLVE FOR Y AND X im getting rele confused on this. ok here is the prob. x+y=5 x-2y=-4 equation 1 x+y=5 equation 2 x-2y=-4 Multiply equation 1 by -1. Add equation 1 to equation 2. The x term cancels. Solve for y. THEN, put the value of y into either equation and ...

*December 17, 2006*

**math**

now i have to solve for y. i already no that x=-1. y=-1-2 y=3(-1)+2 -1 -2 = -3 3(-1)+2 = -3 +2 = -1 THANX I WAS SO CONFUSED ON THAT

*December 17, 2006*

**math**

Solve for each system and equations. y=-x-2 y=3x+2 set -x-2=3x+2 solve for x. thanx i was minusing 2 instead of adding two thanx alot

*December 17, 2006*

**Math**

8 runners are entered in the 1000-meter run. How many different first, second, and third place finishes could possibly occur? Is the answer 24? No. 8x7x6 = 336 The first place can be any of eight. For each first place possibility, there are seven possible second place ...

*December 14, 2006*

**Math**

8 runners are entered in the 1000 meter run. How many different first, second, and third place finishes could possibly occur? Is the answer 24? I think that would be a reasonable answer. Way low. I think 8*7*6=336 permutations

*December 14, 2006*

**Deforestation and Wildlife**

What are relationships between deforestation and wildlife extinction? Thank you for using the Jiskha Homework Help Forum. With deforestation the animals lose their habitat. Here is an interesting site: animals.about.com/b/a/2003_08_18.htm Here is a good site on deforestation: ...

*December 7, 2006*

**Math**

How many different three-digit numbers can be written using the digits 4, 5, 6, and 7? Use each digit only once in a number. Is the answer---24 different 3-digit numbers? I did this the long way--Is there a short equation to use for this? Thank you! You have four digits: The ...

*December 4, 2006*

**Substitution Method in Algebra!HELP PLZ!**

m-2n=11

*November 5, 2006*

**Math**

Find a quick and easy method to compute the sum of the first 100 counting numbers. I can't use a calculator. I can't figure out an easy way. 1+2+3+4+5...........98+99+100 Carl Freidrich Gauss had no idea as to how famous his name would become when he solved a seemingly...

*October 3, 2006*

**chemistry**

what are the gases that constitute the air in a refinery Are you talking about what is inside the refinery column (petroleum derivatives), the intake gas (the atmosphere) or the effluent/exhaust (from the stacks?)

*September 22, 2006*

**Economics**

Write the equation of exchange. Define each variable in the equation and then explain why the left side of the equation must equal the right. MV=PQ Take a shot, what does it mean an why must the left = the right.

*July 13, 2006*

**Weird question.........H.W due in tomrrow...quick**

i saw it jai. :D

*June 14, 2005*

**Statistics**

Perfect!!! :P

*June 13, 2005*