Saturday

November 28, 2015
Total # Posts: 22,936

**Math**

assume your symbol is upside down U or intersection, in both where circles overlap 2 in both 4 6 8 even numbers up to 8 looks like d
*November 10, 2015*

**math**

****** + ****** = ****** ****** which is 12 count them
*November 10, 2015*

**Math**

whew, great !
*November 10, 2015*

**Math**

all but the 70 who downloaded CD only That is 340
*November 10, 2015*

**Math**

220 = both 290 -220 = 70 = CD only 410 - 70 = download = 340
*November 10, 2015*

**Math**

1.25 x >/= 150 x >/= 120 a
*November 10, 2015*

**Math**

x + (x+5) = 70 2 x = 65 x = 32.50 x+5 = 37.50
*November 10, 2015*

**Math**

Just do it 1 2 3 4 6 8 12 24
*November 10, 2015*

**Math**

No has to be greater than, not equal to so d
*November 10, 2015*

**Math**

12 < 8 y - y^2 or 8 y - y^2 > 12 now is 8*2 - 4 > 12 I think not but 8*3 - 9 = 24 - 9 = 15 which is
*November 10, 2015*

**Math**

c >/= 325 - 135 - 89 c >/= 101 so 101 or more
*November 10, 2015*

**pre algebra**

12.25 % = 0.1225 yes
*November 10, 2015*

**pre algebra**

better start a new question. This scrolling is getting a bit much.
*November 10, 2015*

**pre algebra**

to get decimal from percent divide percent by 100
*November 10, 2015*

**pre algebra**

divide by 100 8% = 8/100 = 0.08
*November 10, 2015*

**pre algebra**

I would go with only 0.03 x
*November 10, 2015*

**pre algebra**

I guess so, but I would never write x0.03
*November 10, 2015*

**pre algebra**

I think so although I would have written x * 0.03 0.03x is clear x0.03 is confusing
*November 10, 2015*

**pre algebra**

Yes they are equivalent
*November 10, 2015*

**pre algebra**

the one with the / is right :)
*November 10, 2015*

**pre algebra**

I know what you mean, but it is not used in algebra I was a college professor, engineering.
*November 10, 2015*

**pre algebra**

oic, there is none, / is always used but division symbol not normally used in algebra x/3 would be normal or x --- 3 maybe :)
*November 10, 2015*

**pre algebra**

Interesting, A and E are the same. typo ?
*November 10, 2015*

**pre algebra**

tutors are supposed to interact with student right here.
*November 10, 2015*

**pre algebra**

I can not take you to facebook, rules.
*November 10, 2015*

**pre algebra**

I think it is E x/3 is x over 3
*November 10, 2015*

**pre algebra**

Yes
*November 10, 2015*

**pre algebra**

15 x which is c
*November 10, 2015*

**pre algebra**

there are 1000 mL in a L that is what milli means, one thousandth
*November 10, 2015*

**pre algebra**

1.2 Liters ( 1000 mL/L) = 1,200 mL
*November 10, 2015*

**pre algebra**

divide by 10,000 not 1,000 :) answer is .028
*November 10, 2015*

**pre algebra**

very few :) 1 square meter = 100 cm * 100 cm = 10,000 cm^2 so (1 m^2/10,000) cm^2 280 cm^2 * (1 m^2/10,000 cm^2) = 0.028 m^2
*November 10, 2015*

**pre algebra**

I just tried them in order 1 hecktometer = 100 meters 100 * 100 = 10,000 square meters so 100 of them is 1,000,000 square meters which is a square kilometer
*November 10, 2015*

**pre algebra**

Sorry, grandkids just came home from school.
*November 10, 2015*

**pre algebra**

a square kilometer is 1000 meters * 1000 meters = 1,000,000 meters squared 1 hectometer/100 meters 1 dekameter/ 10 meters etc 100 square hectometers = 100 * 100 meters * 100 meters = 1,000,000 meters squared right so A
*November 10, 2015*

**pre algebra**

well, let's see the next one. Type it carefully.
*November 10, 2015*

**pre algebra**

But your original question was: 1 square yard = 9 A square mile B square feet C square inches D square kilometers E square meters The answer is B 1 square yard = 9 square feet
*November 10, 2015*

**pre algebra**

36 * 36 = 1296 square inches right
*November 10, 2015*

**pre algebra**

Well I am sure you know that if you have 3 kittens per house and 3 houses that is 9 kittens :)
*November 10, 2015*

**pre algebra**

yes 1 yard = 3 feet 1yard * 1 yard = 1 yard square = 3 feet*3 feet = 9 feet square
*November 10, 2015*

**pre algebra**

if you started with 3 houses and 3 kittens per house then 3 houses ( 3 kittens/house) houses cancel and I have 3*3 = 9 kittens
*November 10, 2015*

**pre algebra**

You are doing fine. but there is a method to changing units like this if you have 9 kittens and 3 kittens/house then you have 9 kittens ( 1 house/ 3 kittens) kittens cancel and you have (9/3) houses = 3 houses
*November 10, 2015*

**pre algebra**

Yes, 36 inches = 1 yard
*November 10, 2015*

**pre algebra**

Remember I said 1 square yard = 3 feet one one side times 3 feet on the other side = 9 square feet indeed
*November 10, 2015*

**pre algebra**

1 square yard = 9 square feet. That is B
*November 10, 2015*

**pre algebra**

1 square foot = 12 inches * 12 inches = 144 square inches so 1 square mile = 27,878,400 square feet (144 square inches/square foot) = 4,014,489,600 square inches
*November 10, 2015*

**pre algebra**

1 square yard = 3 feet one one side times 3 feet on the other side = 9 square feet indeed a square mile = 5280 feet times 5280 feet = 27,878,400 square feet
*November 10, 2015*

**pre algebra**

let's see now I graduated grade 12 in 1955 so in 1955 I would have been about 12 + 5 = 17 2015 - 1955 = 60 years ago + already 17 = 77 years old approximately (and in fact correctly :)
*November 10, 2015*

**pre algebra**

a square yard is a square one yard on a side at its most simple geometry. However it can be any plane figure that has that same area such as a circle of radius pi r^2 = 1 or r = sqrt (1/pi)
*November 10, 2015*

**pre algebra**

Mustard Seed home school ? I Googled it.
*November 10, 2015*

**pre algebra**

Yes :) assuming that she really paid 416 in sales tax.
*November 10, 2015*

**pre algebra**

LOL, no, I went to Exeter then MIT where I graduated in physics in 1959 then got a PhD in engineering in 1968. I however home schooled my niece in math, physics, and chemistry so have some experience with home schooling.
*November 10, 2015*

**pre algebra**

seeds ?
*November 10, 2015*

**pre algebra**

you do .08 x /.08 = 416/.08 which is 1 x = 416/.08 which is 5200
*November 10, 2015*

**pre algebra**

416/.08 then That sounds like quite a lot, but I suppose a 3D holophone might be very expensive. On the other hand you might have meant she paid $4.16
*November 10, 2015*

**algebra**

f(x) = .2 x + 30
*November 10, 2015*

**Calculus**

(1/10) t^5 + 3 t both are odd so the answer from -2 to +2 is twice answer from 0 to 2 2 [ 2^5/10 + 6 ] 2 ( 9.2) = 18.4
*November 10, 2015*

**Calculus**

http://www.jiskha.com/display.cgi?id=1447178366#1447178366.1447179649
*November 10, 2015*

**Calculus**

I just did.
*November 10, 2015*

**Math**

4/0 is undefined
*November 10, 2015*

**pre-Calculus**

I wonder why we call this PRE-calculus :)
*November 10, 2015*

**pre-Calculus**

(1/10) t^5 + 3 t both are odd so the answer from -2 to +2 is twice answer from 0 to 2 2 [ 2^5/10 + 6 ] 2 ( 9.2) = 18.4
*November 10, 2015*

**Calculas**

integral from 1 to 4 of (-3x+4) dx ? that is the sum of two integrals -3 x dx and 4 dx the first one is - (3/2) x^2 at 4 - at 1 = -(3/2)(16 - 1) = -(3/2) 15 = -45/2 the second one is 4 (4-1) = 12 so I get -45/2 + 24/2 = -21/2
*November 10, 2015*

**maths**

100 - 15 - 7 - 30 40 (2.5/100) y + 5 - 5 = 21 + 5 - 5 3-1 = 2 (60 + 6*25) /7 1 x + 3 x = 4 x = 10 x = 10/4 = 5/2 3 x = 15/2 = 7.5
*November 10, 2015*

**Calculus**

So what was the problem? The first part was the hard part and you did it with no trouble.
*November 10, 2015*

**physics**

angular momentum is conserved since there is no torque in this problem I omega = constant m R^2 omega = constant m R v = constant m is constant so R v = constant original R = 1.76 final R = 1.76 - .66 = 1.1 so what ever your question might be (you did not ask) 1.76 (6.6) = 1.1...
*November 10, 2015*

**math**

maybe factor it? 4(x - 3)
*November 9, 2015*

**Physics**

Ke initial = (1/2)(91)(2.7)^2 = 332 Joules Ke final = (1/2)(91)(1.02)^2 = 47.3 Joules 332 J - 615 J + 3620 J = 47.3 J + m g h so m g h = 3290 Joules h = 3290/ (91*9.81) = 3.69 meters (how did the ice get tilted ? :)
*November 9, 2015*

**Calculus**

f' = 0 = 4 - 2 x so x = 2, right at 2 y = 17 + 8 - 4 = 21 check end points at x = 0, y = 17 at x = 5, y = 17+20 -25 =12 21 is at the vertex and is maximum 12 is minimum on this restricted domain
*November 9, 2015*

**Quick Physics Check**

4. Horizontal component of velocity, u, is CONSTANT D I agree with the rest, although it does not say what the helicopter is doing. If it were also following like the truck, then both the truck and the helicopter would see up and down.
*November 9, 2015*

**Physics**

Force in direction of motion = Fx = 195 cos 41 so work done = 195 cos 41 * 3 Joules I assume you mean 3 meters, not 3 millimeters
*November 9, 2015*

**physics**

Their rest mass has to be zero or it would be infinite at their speed, which of course is the speed of light :) mass = rest mass/sqrt(1-beta^2) where beta = v/c if v is c, then the denominator approaches zero and if there is finite rest mass the fraction --->oo
*November 9, 2015*

**math**

7/(3*9) = 7/27
*November 9, 2015*

**math**

well, I guess a gallon of water is about eight pounds (a pint is a pound the world around :). 220 gallons ( 8 pounds/gallon) = 1760 pounds
*November 9, 2015*

**maths**

he had x in the beginning then he had (1/2) x then he had (1/2)(1/2) = (1/4) x so (1/4) x = 1.25 x = 5 in the beginning
*November 9, 2015*

**math**

In the time you took to type all these you could have done them.
*November 9, 2015*

**math help**

y = m x + b well, that is easy y = (2/3) x + 9 ====================== (y - -3)/(x - 1) = (1 - - 3)/(3-1) (y+3)/(x-1) = 4/2 = 2 y+3 = 2x-2 y = 2 x - 5
*November 9, 2015*

**ASAP Ms. Sue**

Can you make the decision based on political party affiliation?
*November 9, 2015*

**pythagorean triple**

3*6 , 4*6 , 5*6 :)
*November 9, 2015*

**Physics **

"The rest (5100-620) or 4480 Joules came from the power breakfast he ate earlier." In other words he used 4480 Joules of energy that was stored in his body.
*November 8, 2015*

**Physics **

Gravity does negative work on him - m g h = -77.6* 9.81 * 6.7 = - 5100 Joules That is how much potential energy he gains going up the hill. He loses kinetic energy loss in Ke = (1/2)(77.6)(25-9) = 620 Joules He needed to use 5100 Joules to get up the hill 620 of that came ...
*November 8, 2015*

**PHYSICSSS**

u = 66.7 * sqrt2/2 Vi = 66.7 * sqrt 2/2 v = Vi - g t at the top v = 0 so t = Vi/g at the top then use that t to get h,the max height h = Vi t - 4.9 t^2 meanwhile the u remained constant and to get the range use d = 2 u t (twice the time up is the total time in the air.)
*November 8, 2015*

**physics**

It goes 6900 km the time is 3900/810 + 3000/950 so Vaverage = 6900 / [ 390/81 + 300/95 ] = 865.4
*November 8, 2015*

**physics**

x = (1/2) a t^2 200 = 8 t^2 t = 5 seconds v = a t = 8 * 5 = 40 meters/ second
*November 8, 2015*

**Math**

12 * 18 = 216
*November 8, 2015*

**math**

2 L + 2 w = 56 or L + w = 28 L = w + 9 (w+9) + w = 28 2 w =19 w = 9 1/2 L = 18 1/2
*November 8, 2015*

**physics**

.1 ns = 1 * 10^-10 m/s c = 3*10^8 m/s approx d = 2 * 3.84 * 10^8 = 7.68 *10^8 m time = d/c = 7.68/3 = 2.56 s percent = (10^-10/2.56) * 100 = 10^-8/2.56 = 10 * 10^-9 /2.56 = 3.9 * 10^-9 percent
*November 8, 2015*

**Math**

g + g+10 = 28 2 g = 18 g = 9 girls then boys = 19
*November 7, 2015*

**MATH - I did this**

http://www.jiskha.com/display.cgi?id=1446934898
*November 7, 2015*

**Math-check my answers please :)**

https://www.google.com/search?q=regular+pentagon+lines+of+symmetry&tbm=isch&tbo=u&source=univ&sa=X&ved=0CB0QsARqFQoTCIXGwZqy_8gCFYo_PgodycsNtg&biw=1920&bih=949 A REGULAR pentagon has five
*November 7, 2015*

**Math-check my answers please :)**

7.Point A(8,-10) is reflected over the Y-axis. Write the coordinates of A -8,-10 8,10 8,10 -8,10*** ========================== You move LEFT yes BUT You do not move up ! (-8,-10)
*November 7, 2015*

**Math-check my answers please :)**

5. Craig used the diagram to compute the distance from Ferris to Dunlap to Butte. How much shorter is the distance directly from Ferris to Butte than the distance Craig found? (1 point) 14 mi 28 mi*** 70 mi 98 mi I have no idea without the picture
*November 7, 2015*

**Math-check my answers please :)**

hint - what is 25 + 144 ?
*November 7, 2015*

**Math-check my answers please :)**

2.The length of a hypotenuse of a right triangle is 13cm. The length of one leg is 5cm. Find the length of the other leg. A.14*** B.144 C.8 D.12 NO!!! leg can not be longer than hypotenuse
*November 7, 2015*

**Algebra**

log 160 = 2.2
*November 6, 2015*

**Algebra 2: is anyone here?**

another way: -1 = (y - -8) / (x - 2) Maybe the form you want y + 8 = -x + 2 that is of course the same as y = -x - 6
*November 6, 2015*

**Algebra 2: is anyone here?**

Anyway, I want a raise.
*November 6, 2015*

**Algebra 2: is anyone here?**

y = -1 x + b -8 = -1(2) + b -8 = -2 + b b = -6 so y = -1x - 6 or y+6 = - x
*November 6, 2015*

**Calculus**

area = A = 2 pi r h + 2 pi r^2 2.1 liters = .0021 m^3 .0021 = pi r^2 h so h = .0021/(pi r^2) so A = 2 pi r (.0021)/(pi r^2) + 2 pi r^2 or A = .0042/r + 2 pi r^2 for min area dA/dr = 0 0 = -.0042/r^2 + 4 pi r 4 pi r^3 = .0042 r = .0694 meters or 6.94 cm then h = .139 meters or ...
*November 6, 2015*

**Precalculus**

10 x^2 = 2^x ah well, we will need the calculator or table to do the logs anyway but log (10 x^2) = log 10 + 2 log x if base ten logs = 1 + 2 log x log 2^x = x log 2 so 1 + 2 log x = x log 2 I need my slide rule or a calculator now :)
*November 6, 2015*