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April 21, 2014

April 21, 2014

**Recent Homework Questions About Algebra**

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**Algebra II**

-4?
*Friday, February 7, 2014 at 1:52pm*

**Algebra II**

the graph of a function which has a root of multiplicity 2 is tangent to the x-axis there, rather than crossing it. So, pick the choice which reflects the fact that f(x) is tangent to the x-axis at (0,0)
*Friday, February 7, 2014 at 1:46pm*

**Algebra II**

i believe it could be A or C, i'm not sure though :(
*Friday, February 7, 2014 at 1:41pm*

**Algebra II **

It has a graph but i cant paste it on here, could you guide me through plz Which is a root of f(x) = 0 with a multiplicity of 2? -4 -3 3 4
*Friday, February 7, 2014 at 1:26pm*

**Pre-algebra**

David must choose a number between 49 and 95 that is a multiple of 4, 6, and 8. Write all the numbers that he could choose. If there is more than one number, separate them with commas.
*Friday, February 7, 2014 at 10:55am*

**algebra**

A man and a woman's ages total 98. He is twice as old as she was when he was her age now. What are their ages?
*Friday, February 7, 2014 at 9:27am*

**Algebra 2**

18x^3+9x^2 - (2x+1) 9x^2(2x+1) - (2x+1) (9x^2-1)(2x+1) (3x+1)(3x-1)(2x+1)
*Friday, February 7, 2014 at 5:34am*

**Algebra 1**

assuming the usual carelessness with parentheses, I get (2x+10)/(x+5) = 2(x+5)/(x+5) = 2 (x^2-25)/(3x-15) = (x+5)(x-5) / 3(x-5) = (x+5)/3 (x^2+4x)/(x^2-9x) = x(x+4) / x(x-9) = (x+4)/(x-9) (n^2+7n+10)/(n^2+2n-15) = (n+2)(n+5) / (n-3)(n+5) = (n+2)/(n-3)
*Friday, February 7, 2014 at 5:24am*

**algebra 2**

e = c/3 p = e/2 e+c+p = 1800 c/3 + c + c/6 = 1800 3c/2 = 1800 c=1200 e=400 p=200
*Friday, February 7, 2014 at 5:15am*

**algebra 2**

three computers were on sale model E computer was priced at 1/3 the price model C and model P was priced at 1/2 the price of model E on business bought one of each type of computers on sale and paid a total $1800
*Friday, February 7, 2014 at 12:11am*

**algebra**

12$
*Thursday, February 6, 2014 at 9:57pm*

**algebra**

t
*Thursday, February 6, 2014 at 9:44pm*

**Algebra 1**

Simplify each expression. 1. 2x + 10/x+5 2.x^2 - 25/3x - 15 3. x^2 + 4x/x^2 - 9x 4. n^2 + 7n + 10/ n^2 + 2n - 15 Please explain how to do these I don't understand!
*Thursday, February 6, 2014 at 9:21pm*

**Algebra 2**

The projected population in thousands for a city over the next several years can be estimated by the function P(x)= x^3 + 2x^2 - 8x + 520, where x is the number of years since 2005. Use synthetic substitution to estimate the population. Also could anyone help me with the ...
*Thursday, February 6, 2014 at 6:46pm*

**Algebra**

Your answers are correct!
*Thursday, February 6, 2014 at 6:19pm*

**Algebra 2**

v = Vi - g t h = hi + Vi t - 4.9 t^2 after 3 seconds h = 40 + 10 (3) - 4.9*9 = 25.9 meters above ground on the way down 0 = 40 + 10 t - 4.9 t^2 4.9 t^2 - 10 t - 40 = 0 t = [ 10 +/- sqrt(100 +784) ] / 9.8 take big t choice (on the way down) t = 4.05 seconds
*Thursday, February 6, 2014 at 5:58pm*

**Algebra 2**

Yoko threw a stone upward at a speed of 10m/sec while standing on a cliff 40 m above ground. A. What was the height of the stone after 3 seconds? B. Estimate how long it took for the stone to touch the ground
*Thursday, February 6, 2014 at 5:18pm*

**9th grade algebra/Ms Sue**

22
*Thursday, February 6, 2014 at 3:37pm*

**9th grade algebra**

10280 * 1.01^5
*Thursday, February 6, 2014 at 2:38pm*

**Algebra 2**

280/400 = 0.7 196/280 = 0.7 137.2/196 = 0.7 Looks like the height on the nth bounce is 400*0.7^n
*Thursday, February 6, 2014 at 2:37pm*

**Algebra**

correct
*Thursday, February 6, 2014 at 2:26pm*

**Algebra**

What is the order of 5 X 10^-8, 7 X 10^-9, 3 X 10^-9, 8 X 10^4 from least to greatest? Is it 3 X 10^-9, 7 X 10^-9, 5 X 10^-8, 8 X 10^4?
*Thursday, February 6, 2014 at 12:56pm*

**Algebra**

A lab is growing bacteria in a culture dish. The amount of bacteria in the dish doubles every 3 hours. Initially, there are 500 bacteria in the dish. How many are in the dish after 9 hours? My answer: 4000 -(5)^-1 My answer: -1/5
*Thursday, February 6, 2014 at 12:22pm*

**Algebra 2**

A ball is dropped from 400 ft what is the height of the ball on the 6th bounce? 1 bounce =280 ft 2 bounce= 196 ft 3 bounce = 137.2 How do I figure this out?
*Thursday, February 6, 2014 at 11:56am*

**9th grade algebra**

suppose the population of deer in a state is 10,280 and is growing 1% each year. predict the population after 5 years.
*Thursday, February 6, 2014 at 11:47am*

**Algebra 1**

a + 2b = 8 a - b = -4 Multiply the second equation by -1. -a + b = 4 Add the two equations: 3b = 12 b = 4 Put 4 into one equation: a + 2(4) = 8 a + 8 = 8 a = 0 He caught 0 ants and 4 beetles.
*Thursday, February 6, 2014 at 12:59am*

**Algebra 1**

Sam collects insects. However, he only collects ants and beetles. One night while collecting insects for his collection, Sam had an unproductive hunt. The number of ants plus twice the number of beetles was only eight. The difference between the number of ants and beetles was...
*Wednesday, February 5, 2014 at 11:19pm*

**algebra**

w-9 = m+9 (m-9)/(w+9) = 1/2 since m = w-18, 2(w-18-9) = w+9 2w-54 = w+9 w = 63
*Wednesday, February 5, 2014 at 8:20pm*

**algebra**

If Will gives Molly $9 dollars he will have the same amount of money as her. If Molly give Will $9, the ratio of money she has to the money will has will be 1:2. How much money does will have in the beginning?
*Wednesday, February 5, 2014 at 8:18pm*

**algebra**

a. 775 b.1250 c.60 1/5
*Wednesday, February 5, 2014 at 8:03pm*

**algebra**

Susan is driving to Mount Shasta.On her map,she is distance of 7 3/4 inches away.The scale of the map is 1/2 inch is 50 miles. a.) how far must susan travel to reach her destination b.) using the scale,how far is philly,pennslvania from miami florida if it is 12 1/2 inches ...
*Wednesday, February 5, 2014 at 7:08pm*

**algebra**

3n + 1 = 7
*Wednesday, February 5, 2014 at 7:00pm*

**algebra**

One more than three times a number is 7 as an equation
*Wednesday, February 5, 2014 at 6:56pm*

**algebra**

ah - I see this is a rehash of √2 + √(1+k) = √5 √(1+k) = √5-√2 1+k = 5-2√10+2 k = 6-2√10
*Wednesday, February 5, 2014 at 6:13pm*

**algebra**

unless it's √2 + √(1+k) = 2.24 √(1+k) = .8258 1+k = .6819 k = -.3181 check: √2 + √.6819 = 2.24
*Wednesday, February 5, 2014 at 5:31pm*

**Algebra**

3 1/4 +n=9 1/12 n = 8 13/12 - 3 3/12 n = 5 10/12 = 5 5/6
*Wednesday, February 5, 2014 at 5:17pm*

**Algebra**

3 1/4 +n=9 1/12
*Wednesday, February 5, 2014 at 5:09pm*

**Algebra**

Thanks!
*Wednesday, February 5, 2014 at 4:33pm*

**Algebra**

Chessville : 50000(1.07)^n Checkervill: 70000(.96)^n when is 50000(1.07)^n = 70000(.96)6n 5(1.07)^n = 7(.96)^n log both sides and use rules of logs log5 + nlog1.07) = log7 + nlog.96 nlog1.07 - nlog.96 = log7 - log5 n(log1.07 -log.96) = log7 - log5 n = ( log7 - log5)/(log1.07 -...
*Wednesday, February 5, 2014 at 4:18pm*

**algebra**

1.4142 + 1 + k = 2.24 2.4142 + k = 2.24 k = -0.1742
*Wednesday, February 5, 2014 at 3:50pm*

**algebra**

The questions is like this: sqr(2) + sqr(1), and the asnwer is 1 + sqr(2), or in decimal form: 2.4142
*Wednesday, February 5, 2014 at 3:50pm*

**algebra**

square route of 2 plus the square route of 1 plus k = 2.24
*Wednesday, February 5, 2014 at 3:43pm*

**Algebra**

On Jan 1, 2010, Chessville has a population of 50,000 people. Chessville then enters a period of population growth. Its population increases 7% each year. On the same day, Checkersville has a population of 70,000 people. Checkersville starts to experience a population decline...
*Wednesday, February 5, 2014 at 3:18pm*

**Algebra 11**

A sudden debt pay off
*Wednesday, February 5, 2014 at 3:15pm*

**algebra**

16x-28
*Wednesday, February 5, 2014 at 1:39pm*

**Algebra 1**

Thank you Steve~!
*Wednesday, February 5, 2014 at 1:36pm*

**Algebra 1**

p^0 = 1, so mn^-4/p^0q^-2 = (m/n^4) / (1/q^2) = mq^2/n^4 1/(2 (-2)^-4 (4)^2) 1/(2 (1/16) (16)) 1/2 Note that (-2)^4 = (-2)(-2)(-2)(-2) = +16
*Wednesday, February 5, 2014 at 1:34pm*

**Algebra**

Actually my answer is 3.11.
*Wednesday, February 5, 2014 at 1:28pm*

**Algebra 1**

Actually I only need help with the second problem,and the 7th problem, Simplify. mn^-4/p^0q^-2 Evaluate 1/2a^-4b^2 for a=-2 and b=4.
*Wednesday, February 5, 2014 at 1:26pm*

**Algebra**

On Jan 1, 2010, Chessville has a population of 50,000 people. Chessville then enters a period of population growth. Its population increases 7% each year. On the same day, Checkersville has a population of 70,000 people. Checkersville starts to experience a population decline...
*Wednesday, February 5, 2014 at 1:22pm*

**algebra**

Since (x+a)^2 = x^2+2ax+a^2, you want 2a=12
*Wednesday, February 5, 2014 at 1:08pm*

**Algebra 1**

Plz help me with the following problems. Simplify. 5^-1(3^-2) Simplify. mn^-4/p^0q^-2 Write a scientific notation. 0.0042 Write in standard notation. 6.12*10^3 Simplify. Write in scientific notation. 0.5(8 * 10^5) Simplify. Write in scientific notation. (9 * 10^-3)^2 Evaluate ...
*Wednesday, February 5, 2014 at 1:06pm*

**algebra**

what value makes the polynomial factor as a perfect square x+12+?
*Wednesday, February 5, 2014 at 9:14am*

**Basic Linear Algebra**

The function is zero when it crosses the x axis so 0 = 3 x - 12 12 = 3 x x = 4 ---------------------------- When it crosses the y axis x = 0 so f(0) = 5(0) + 1 f(0) = 1
*Wednesday, February 5, 2014 at 6:36am*

**Basic Linear Algebra**

1. At what point does the graph of f(x)=3x-12 crosses the x-axis? 2.At what point does the graph of f(x)=5x+1 crosses the y-axis?
*Wednesday, February 5, 2014 at 6:24am*

**math**

just solve for t when h=0 good old algebra I
*Wednesday, February 5, 2014 at 6:16am*

**Basic Algebra**

2 y = 4 x = 10 y = 2 x - 5 so m = slope = 2
*Wednesday, February 5, 2014 at 6:09am*

**Basic Algebra**

the slope of the given line is 2 perpendicular lines have a slope which is the negative reciprocal.
*Wednesday, February 5, 2014 at 6:01am*

**aka algebra**

5.6/3.2 = x/5
*Wednesday, February 5, 2014 at 5:58am*

**Basic Algebra**

What is the slope of any line perpendicular to the line 4x-2y=10 ?
*Wednesday, February 5, 2014 at 5:54am*

**Basic Algebra**

What is the slope of any line perpendicular to the line 4x-2y=10 ?
*Wednesday, February 5, 2014 at 5:49am*

**Algebra 2**

Jane, from your wording it is not clear if the first card drawn is returned to the deck or not. Suppose it is not returned could be F4 or 4F = (12/52)(4/40) + (4/52)(12/40) = 3/130 + 3/130 = 3/65 Your answer suggests that the card is returned after it is drawn. Then it would ...
*Tuesday, February 4, 2014 at 8:47pm*

**Algebra - eh?**

since you give no values for r and h, I'll have to trust your calculation.
*Tuesday, February 4, 2014 at 7:27pm*

**Algebra 2**

Do I add them and that's it or do I do something else?
*Tuesday, February 4, 2014 at 7:20pm*

**Algebra 2**

oops. Guess I didn't read it right. Good catch.
*Tuesday, February 4, 2014 at 7:16pm*

**Algebra 2**

Theres 12 face cards (4 queens, 4 kings, and 4 jacks) and 4 fours. What would you do with 12/52 and 4/52?
*Tuesday, February 4, 2014 at 7:13pm*

**Algebra 2**

Anonymous -- I think you forgot the 4.
*Tuesday, February 4, 2014 at 7:13pm*

**Algebra 2**

there are 13 numbers, and 3 of them are face cards. So, 3/13 would be the answer. Maybe you counted aces as face cards.
*Tuesday, February 4, 2014 at 7:10pm*

**Algebra 2**

How would you find the probability of drawing a face card and a 4 out of a standard deck of 52 cards? I got 4/13 but I don't think its right.
*Tuesday, February 4, 2014 at 7:09pm*

**Algebra 2**

Can someone please explain how to do this problem? The probability that it will rain today is 65%, and the probability that it will rain tomorrow is 25%. The probability that it will rain both days is 35%. What is the probability that it will rain today or tomorrow?
*Tuesday, February 4, 2014 at 6:48pm*

**Algebra**

The surface area of a cylinder is approximately? a-- 151 m sq b-- 273 m sq c-- 179 m sq d-- 302 m sq my answer is Surface Area of a Cylinder = 2 pi r 2 + 2 pi r h c
*Tuesday, February 4, 2014 at 5:58pm*

**Algebra**

3,2
*Tuesday, February 4, 2014 at 5:51pm*

**algebra**

Now I showed you how to do compounding. Do it.
*Tuesday, February 4, 2014 at 1:49pm*

**algebra**

$3,300 principal earning 4%, compounded annually, after 3 years.
*Tuesday, February 4, 2014 at 1:44pm*

**algebra**

19,900 *1.03^10 = 26,744
*Tuesday, February 4, 2014 at 1:41pm*

**algebra**

2. What is the factored form of x x^2 + 6x + 8? (1 point) (x + 5)(x + 3) (x + 4)(x + 2) <------ 2*4 = 8 (x + 7)(x + 1) (x + 3)(x + 3) 3. What is the factored form of x x^2 – 7x + 12? (1 point) (x – 5)(x – 3) (x – 6)(x – 1) (x – 5)(x – 2) (...
*Tuesday, February 4, 2014 at 1:39pm*

**algebra**

1. Which number makes this equation true? I assume you mean v^2 + 10v + 16 = (v + 8)(v + ?) (1 point) 2 <-------------- 4 6 8
*Tuesday, February 4, 2014 at 1:37pm*

**algebra**

suppose that the population of deer in a state is 19,900 and is growing 3% each year. predict the population after 10 years.
*Tuesday, February 4, 2014 at 1:36pm*

**algebra **

1. Which number makes this equation true? v 2 + 10v + 16 = (v + 8)(v + ?) (1 point) 2 4 6 8 2. What is the factored form of x 2 + 6x + 8? (1 point) (x + 5)(x + 3) (x + 4)(x + 2) (x + 7)(x + 1) (x + 3)(x + 3) 3. What is the factored form of x 2 – 7x + 12? (1 point) (x &#...
*Tuesday, February 4, 2014 at 1:27pm*

**Math-Algebra**

McKenna, you are right. note that 45% is 1/4 of the way from 40 to 60, so only 1/4 of the total is the higher concentration. Just sayin' . . . As for Julie, she had 35-18=17 visits left
*Tuesday, February 4, 2014 at 12:22pm*

**Math-Algebra**

Julie bought a card good for 35 visits to a health club and began a workout routine. After y visits, she had y fewer than 35 visits remaining on her card. After 18 visits, how many visits did she have left?
*Tuesday, February 4, 2014 at 10:55am*

**Math-Algebra**

The answer I got was 9 gal of the 40% alcohol solution and 3 gal of the 60% alcohol solution is needed. Am I right?
*Tuesday, February 4, 2014 at 6:53am*

**Math-Algebra**

if x lbs of 40%, then .40x + .20(10000-x) = .25(10000)
*Tuesday, February 4, 2014 at 5:24am*

**Math-Algebra**

if she uses x gallons of 40%, then .40x + .60(12-x) = .45(12)
*Tuesday, February 4, 2014 at 5:23am*

**Math-Algebra**

Meg has a solution that is 40% alcohol and another solution that is 60% alcohol. If Meg wants 12 gal of a solution that is 45% alcohol, how much of the two solutions must be mixed?
*Tuesday, February 4, 2014 at 3:06am*

**Math-Algebra**

DMF Feeds has two different types of cattle feed containing crude protein in the amount of 45% and 20% respectively. How many of each type must a feed lot manager mix together to obtain 10000lbs of a mixture that is 25% protein?
*Tuesday, February 4, 2014 at 3:04am*

**Algebra 2**

#2: ok, if you meant to say "or" a 4 #5: ace and spade (the ace of spades): 1/52 ace or spade: 4/13
*Tuesday, February 4, 2014 at 12:25am*

**Algebra/Geometry**

Identify the sequence of transformations that maps quadrilateral abcd onto quadrilateral a"b"c"d" Answers 180 rotation around the origin; reflection over the x-axis translation (x,y) -> (x - 2, y + 0); reflection over the line x = -1 enlargement; ...
*Monday, February 3, 2014 at 10:59pm*

**Algebra 1 (Reiny)**

y^10 / y^1 = y^10 y^-1 = y^9
*Monday, February 3, 2014 at 10:26pm*

**Algebra 1 (Reiny)**

Simplify. y^10/y My answer: 1.
*Monday, February 3, 2014 at 10:12pm*

**Algebra 2**

Can someone please check my answers? A card is randomly drawn from a standard deck of 52 cards. Find the probability of drawing the indicated card. 1.Not an ace. =12/13 2.A face card and a four. =4/13 3.A heart or a diamond. =1/2 4.A six or a seven. = 2/13 5.An ace and a spade...
*Monday, February 3, 2014 at 9:44pm*

**Algebra 1 (Reiny)**

4 * 3^4* 2^8/ (2^9 * 3^5 ) I think you mean it that way 4 /(2*3) 2/3
*Monday, February 3, 2014 at 9:43pm*

**Algebra 1 (Reiny)**

Simplify. 2^2 x 3^4 x 4^4/2^9 x 3^5 My answer: 256/384?
*Monday, February 3, 2014 at 9:08pm*

**Algebra 2**

Can someone please check my answers? A card is randomly drawn from a standard deck of 52 cards. Find the probability of drawing the indicated card. 1.Not an ace. =12/13 2.A face card and a four. =4/13 3.A heart or a diamond. =1/2 4.A six or a seven. = 2/13 5.An ace and a spade...
*Monday, February 3, 2014 at 8:08pm*

**Algebra**

mmmh, have you tried substituting t = 4 into the equation and comparing that answer to your graph result when t = 4 on the horizontal axis ?
*Monday, February 3, 2014 at 7:48pm*

**Algebra**

in 5 hours , (from 1:00pm to 6:00pm), he did 5 driveways. (7-2) so he does 1 driveway per hour or he takes 1 hour per driveway.
*Monday, February 3, 2014 at 7:45pm*

**Algebra**

it is in that form
*Monday, February 3, 2014 at 7:41pm*

**algebra**

y-0 = (-2/3)(x-5)
*Monday, February 3, 2014 at 7:41pm*

**Algebra**

Value of computer software The value v of a shopkeeper's inventory software program, in hundred of dollars, is given by v=-3/4t+6, where t is the number of years since the shopkeeper first bought the program. Graph the equation and use the graph to estimate what the ...
*Monday, February 3, 2014 at 7:34pm*

**Algebra**

By 1PM Shani had already shoveled 2 driveways, and by 6PM that day, the number was up to 7. A) Find Shani's average shoveling rate, in number of driveways per hour. B) Find Shani's shoveling rate, in hours per driveway.
*Monday, February 3, 2014 at 7:32pm*

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