# Posts by sam

Total # Posts: 5,211

Math
What is the value of the following expression? - 3| -3 + 6| - 3

math
Eduardo thinks of a number between 1 and 20 that has exactly 5 factors . what number is he thinking of ? explain

Physics
how much energy is required to change 40 g of ice at -10 C to steam at 110 C?

Physics
a ball is given a velocity of 3.89 m/s at an angle of 32 degrees. Calculate the maximum height and the range of the ball after 5.0s.

Physics
A car traveling with an initial velocity of 68 km/h accelerates uniformly at a rate of 1.35 m/s^2 for 4.7s. Find the final speed and displacement of the car during the specified time interval.

Physics
A bus slows down uniformly from 75 km/h to 15 km/h in 12.55 s. How far did the car travel before stopping?

Physics
Henry walks 20 km west forgot his coat, so he turns and heads 13 km east. He decided to go another path to make up for the lost time and travels 30 km south and then moves west for 27 km. Calculate Henry's displacement.

physics
A child and a sled have a combined mass of 87.5 kg slides down a friction-less hill that is 7.34 m high. If the sled starts from rest, what is the velocity of the sled at the bottom of the hill?

math
Use synthetic division to find the quotient and remainder. (r^2-2r+2), (r-1)

Which of the following are structures that rely on capillaries for exchange or movement of small molecules? 1 teeth, aorta, ureter 2 cartilage, epidermis, larynx 3 nephron, villi, alveoli 4 leukocytes, atrium, bronchi answer #2

Ms.Sue?

1 teeth, aorta, ureter 2 cartilage, epidermis, larynx 3 nephron, villi, alveoli 4 leukocytes, atrium, bronchi answer #2

Which of the following are structures that rely on capillaries for exchange or movement of small molecules?

Physics
A car of mass 900.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 49.7 km/hr (13.8 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...

math
thank you starting to get it little by little

math
how would you do the following 12 divided by 2 7/8, 1 1/6 x 3 3/8 ,

math
I think it is 12 because like he/she said is true.

math
How do you do the following 1 5/8 +2 7/24 and 1 3/8 divided by 2/4. NOT SURE OF THE FORMULA

math
Thank you. I thought so too

math
At the Pentagon there are921 feet along each outer side facade and 17.5 miles of corridorS inside it. All sides of the Pentagon are equal. What is the perimeter of the Pentagon

math
Is it 7.98 x2 x4.2 /1/2 =16.75?

math
The area of a triangle is 3.99cm2 . If the base is 4.2 cm, how do you find the height ?

Science help, Ms.Sue
I am also from conections. It is against the school propertys to use outside properties other than what is provided when doing a test.

science very urgent help?
Susan has heard that taking an over-the-counter ‘energy’ pill, which contains as much caffeine as a strong cup of coffee, makes people feel alert and ‘speedy’. She wonders if taking this pill will make a difference to the reaction times of people doing an ...

math
Tom has 58 cards

math
Tom and Max have 72 football cards.Tom has 2 more than 4 times as many cards as Max has. How many football cards does Tom have?

Geography
They sailed...(double post ;))

Social Studies (History)
Just google search it, @Nicole, it's not that hard honestly...

math
Yeah what Steve said

math
For the first one: if you have to, just list em all out Mugs: 6,12,18,24,30,36,42,48,54,60.... Shirts: 14,28,42,56,70.... See any numbers in common so far? Yep: the 42. So the 42nd guest will get both Second one: Can't figure it out, cuz not enough information, did you ...

Math - Precalculus - Parametric Equations/Geometry
Thanks, but I was wondering how you got the horizontal and vertical speeds, sorry I'm not that good at parametric equations yet :( Also how did you get that the angular velocity is 3*2pi / s? Thanks

Math - Precalculus - Parametric Equations/Geometry
A hockey puck of diameter 3 inches is spinning around its center at a speed of 3 counterclockwise rotations per second. The center of the puck is traveling at a speed of 24 inches per second at an angle of 45 degrees to the positive real axis. (a) At time t=0, the center of ...

math
If you buy one ticket you have a 1/2500 chance of winning. Thus, you're expected value is 5000/25\$ = 2\$ return for your 5\$ ticket. So you get -\$3.

College Algebra
C * x = C x = C/C C/C = 1 x = 1

College Algebra
slope = y2 - y1 / (x2-x1) = 7/5 perpendicular = -1/m so we have -5/7

College Algebra
Erm....? *I found them!* They're in the 3rd row before the = signs. Seriously though, I don't get what you're asking...

math
adult ticket = 3 * child ticket adult + child = 36 substitute in: 3 child ticket + child ticket = 36 4 child ticket = 36 child ticket = 9

algebra
ax^2 + bx + c = 1 plug in first value 4a -2b + c = 1 do the same for the others: 0 + 0 + c = 5 c = 5 16a + 4b + c = -59 so we plug in c into the equations with and b: 16a + 4b + 5 = -59 4a -2b + 5 = 1 4a = 2b -4 2a = b - 2 16a + 4b = -64 8(b-2) + 4b = -64 2(b-2) + b = -16 2b...

Math, HELP!
A concert venue sold 1425 tickets one evening. Tickets cost \$40.00 for a covered pavilion seat and \$30.00 for a lawn seat. Total receipts were \$48,000.00. How many of each type of ticket were sold?

math
Thank you. I was going crazy trying to figure it out.Thank you for all your help in math

math
sorry i just don't get it.

math
Started with 125.87 -40 =85.87

math
IS IT 85.87 +40.00 =125.87 -22.25 =103.62 +22.25. so is it103.62?

math
This morning Tom deposited 22.25 in his bank account. At lunchtime he withdrew 40.00 and he found out that he had a balance of 85.87. What was his balance at the start of the day?

math
72 is what percent of 480? Write an equation.

math
15/23.25= x/100 then you cross multiply?

math
Estimate a 15% tip on a taxi ride that cost 23.25.

math
thank you!

math
36*108=3888 divided by 100=38.88?

math
108 is 36% of what number? Write and solve a proportion.

math
It is B.

math
What percent of 94 is 23? A.n/94=23/100 B.23/94=n/100 C.94/n=23/100 D.23/94=100/n

math
What number is 73% of 215? A.215=0.73n B.n=0.73*215 C.0.73=n*215 D.215=73n

Algebra2
srry :(

Algebra2
minus the first from the 3rd equation we get 3x-3x + 2y-2y + 3z -z = 7-1 2z = 6 z = 3 plug into the 2nd equation to get 5x+5y = 3-12 = -9 plug into the first equation to get 3x+2y = 4 Multiply the 2nd equation by 2 and the 1st by 5 10x+10y = -18 15x+10y = 20 minus first from ...

Parametric equations/Trigonometry - Lattice points
Thanks, but why is it a triangle and not a line I graphed it and it is a line do I have to connect the ends and stuff?

Parametric equations/Trigonometry - Lattice points
A lattice point is a point with integer coordinates. How many lattice points (x,y) with -100 less than or equal to x less than or equal to 100 and -100 less than or equal to y less than or equal to 100 are on the graph of the parametric equations x=30-40 cos t y=-50 + 30 cos t...

Geometry
volume = w * h * l surface area = 2wh + 2lh + 2wl So find something with dimensions that multiply up to the same number but the surface area is different, for example if w = 1 h = 2 l = 8 compared with w= 1 h = 4 l = 4 It would give different surface areas 4 + 32 + 16 8 + 8 + 32

Trigonometry
ww w . wolframalpha . c om

Chemistry
I have a similar question and I got 1.7x10^-8 but would we have to multiply this value by 2?

English
I suppose so, if she meant a journal entry, you should probably write it as a journal entry.

science
P = W(joules)/t(time in sec) 120J / 5 seconds = ?

Language Arts
? @ zamaya @ sandy, we were given no info, no story...

Astronomy
Erm...I don't think we're going to solve all these problems for you you need to at least make some effort

Algebra 1b!
what do yo think for each problem?

Geometry
2.5 * 4.6 * x = 172.5 x = 15 surface area = 2 * wh + 2*wl + 2*hl 2.5 * 4.6 * 2 + 2*2.5 * 15 + 2*4.6*15 =?

Math
Erm...no....it can't.

math
0.205 * 7700 = ?

Math-Precalculus-Parametric Equations - Ellipses
Thank you very much both of you sirs it is much appreciated!

Math-Precalculus-Parametric Equations - Ellipses
The graph of the equation (x-h)^2/(a^2) + (y-k)^2/b^2 = 1 is an ellipse with center (h,k), horizontal axis length 2a, and vertical axis length 2b. Find parametric equations whose graph is an ellipse with center (h,k), horizontal axis length 2a, and vertical axis length 2b, and...

science
And I'd say B not A cuz brown bats are like keystone species and they are vital to the environment, some other bats might not be in the area etc. Or they might be the most plentiful

science
B I'd say, cuz there's probably lotsa other different types of that type of animal, (for example different types of bat, not just brown bats) so those animals would "fill in the gap"

MATH
2X-3Y=5 -2X -2X -3Y=5-2X DIVIDE BOTH SIDES BY -3 Y=-5/3+2/3X NOW DO THE SAME FOR THE OTHER ONE PLUG THE -2 IN FOR X Y=-5/3+2/3(-2) PUT IN CALC WATCH SIGNS!! Y=-3

MATH
Y=2X+4 Y=2(3)+4 Y=6+4 Y=10

MATH
CORRRECTION!!!! -4/5!

MATH
5X-Y=3 -5X -5X -Y=3-5X DIVIDE BY -1 ON BOTH SIDES Y=-3+5X PLUG IT IN PLUG IT IN 7=3-5(X) SOLVE SUBTRACT BY 3 ON BOTH SIDES 4=5X AND DIVIDE BY -5 ON BOTH SIDES 4/5=5/5X 4/5=X

Trigonometry/Geometry - Inequalities
Actually I solved it, but thanks :P

Trigonometry/Geometry - Inequalities
Let a, b, and c be positive real numbers. Prove that sqrt(a^2 - ab + b^2) + sqrt(a^2 - ac + c^2) is greater or equal to sqrt(b^2 + bc + c^2). Under what conditions does equality occur? That is, for what values of a, b, and c are the two sides equal? This looks like a geometry...

algebra
lol caps much?

Trigonometry - Geometry - side lengths
ohhhhh that makes sense i should have thought of that thanks!

Trigonometry - Geometry - side lengths
In convex quadrilateral ABCD, angle A is congruent to angle C, AB=CD=180, and AD is not equal to BC. The perimeter of ABCD is 640. Find cos A. Hmm...I drew the diagram, and labeled some things, I drew an altitude from D to AB and did some other things, but no success was ...

science
Which of the following...?

language
? or....? Anyways, the grammar is correct, I suppose.

Algebra 2
multiply all sides by 2x^2 1 + 4x^3 + 6x^2 = 0 let y = x^2 1 + 4y^2 + 6y=0 4y^2 + 6y + 1 = 0 Apply the quadratic formula then sqrt the answer to get the answer

Classical Mechanics Physics
:/ What did you do so far? Also, we're not really going to solve all your problems for you you have to at least make an effort

statistics
Where are the scores

help
first number ----> machine ----> 2nd number ---> machine ---> 3rd number ----> machine ----> 4th number = 271 Machine basically multiplies the number by 3 and subtracts 2. So we work backwards. 271 + 2 = 273. Divide it by 3 to get the 3rd number, 91. Do the ...

physics
Calculate the net work output of a heat engine following path ABCDA in Figure 14.30, where V1 = 5.0 10-3 m3 and V2 = 20.0 10-3 m3.

physics
The rate of heat conduction out of a window on a winter day is rapid enough to chill the air next to it. To see just how rapidly windows conduct heat, calculate the rate of conduction in watts through a 3.00 m2 window that is 0.600 cm thick if the temperatures of the inner and...

math
3/5 chance beofre of picking a purple marble 3/5 = 2+ 4 the rest of marbles = 4 so 4 / 4+4 = 1/2

math
......?

English
how does hawthorne use irony to criticize puritan society

Science need help
A group of students are setting up the first experiments, looking at the growth of roots in water containing an added factor. They have decided to grow seeds in both in pure tap-water and in water with a defined amount of vinegar added. As part of their group discussions they ...

Trig-Weird Geometry Problem
Thanks steve!

Trig-Weird Geometry Problem
Determine all triangles ABC for which tan(A-B)+tan(B-C)+tan(C-A)=0. There's a hint: "Can you relate A-B to B-C and C-A?" Should I apply the tangent difference formula (tan(x-y))? Help would be appreciated, thanks.

math words problem
B = 5600 + 71n

Science need help
nces.ed .gov/nceskids/help/user_guide/graph/variables.asp

Geometry/Trigonometry
Wow thanks a lot that helped!