# Posts by Steven

Total # Posts: 593

**France**

What happened during the 1948 War?

**France**

When did France grant independence to Syria?

**Chemistry**

For the combustion of acetylene: 2C2H2(g) + 5O2(g) ? 4CO2(g) + 2H2O(g) ?H = -2511 kJ What is the enthalpy change when 2.80 g of C2H2 (g) reacts with excess oxygen.

**Math geometry**

The surface area of a cube is 96in2.what is the volume of the cube?

**social studys**

a d a c is right thanks everyone

**Chemistry**

If one wanted to a make a 500.0 mL of 4.5 x 10-6M solution of this red dye, how many grams would they need to weigh out? The molar mass of the dye is 492 g/mol. SHOW WORK.

**math**

After a drought, the Great Salt Lake in Utah covered an area of 2450 kilometers squared or 35/64 the area of the lake under normal weather conditions. Find the area of Great Salt Lake under normal weather conditions.

**physics**

A long straight vertical wire of diameter 2.0mm carries a steady current upwards. At 30mm from the centre of the wire, the magnetic field strength is 0.10mT. Sketch a graph to show the variation of magnetic field strength from the wire surface to a distance of 40mm from the ...

**maths please help me**

NOTE: before you answer this question, please be aware that there aren't meant to be any full stops after the '2' or the 'i=0'. Also the underscores '-' represent how the following number is meant to be a lower case number. The ^ represents root ...

**mathss**

Write the following polynomial in summation notation: 2 + 3x + 4x^2 + 5x^3

**maths**

NOTE: before you answer this question, please be aware that there aren't meant to be any full stops after the '2' or the 'i=0'. Also the underscores '-' represent how the following number is meant to be a lower case number. The ^ represents root ...

**6th grade Math**

7L+2

**maths**

Find all possible solutions in the range 0°? x ? 180° of the following equations: (a) cos x = sqrt(2) / 2 (b) tan x = sqrt(3) / 3 (c) sin x = sin60° (d) cos x = -1/2 (e) sin x = -1/2

**Math**

Please just answer the question T^T ples

**PHYSICS**

An aeroplane makes in emergency landing without landing gear. If the aeroplane touches down with a horizontal speed of 60.0ms^-1 and the coefficient of friction for aluminium on asphalt is ? = 0.500, how far will the aeroplane slide before coming to rest? You may assume that ...

**PHYSICS (REALLY DIFFICULT PLEASE HELP)**

An aeroplane makes in emergency landing without landing gear. If the aeroplane touches down with a horizontal speed of 60.0ms^-1 and the coefficient of friction for aluminium on asphalt is ? = 0.500, how far will the aeroplane slide before coming to rest? You may assume that ...

**Maths (really hard)**

The points A(1,5) and B(9,3) are part of a triangle Î”ABC. The triangle has a right angle at A and and sides satisfy AB=2AC. Find a point C such that C lies above the line AB.

**maths**

(a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated in part (a).

**Maths**

(a) Find the points which divide the line joining A(1,3) and B(-4,-1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same x-y axes plot the point A(1,3) and B(-4,-1) and draw the line joining them. Add the three points which you calculated in part (a).

**MATHS URGENT PLEASE HELP**

The mid-point of the straight line joining A(4,-3), B(6,-2) is located at C. (a) Calculate the coordinates of C. (b) Verify your result by calculating the distances AC and BC and showing they are equal.

**MATHS URGENT PLEASE HELP**

Calculate the lengths of the straight lines joining the following pairs of points, leaving your answers in surd form: (a) A(1,-5), B(6,10); (b) A(4,-3), B(7,6).

**Probability**

A box contains 6 pagers. Assume any pager selected from the box is done randomly, and hence selections are independent from each other. The probability of a selected pager being defective is 0.25. Let X be the random variable for the number of defective pagers. (a) Determine ...

**algebra**

If the order doesn't matter, what is the probability of drawing 1 brown and 2 orange marbles from a bag containing 5brown, 6yellow, 4blue, 3green and 2orange? Is it 5/20* 2/19* 1/18 or do I use a formula with factorials?

**algebra**

A bag of marbles contains 5 brown, 6 yellow, 4 blue, 3 green and 2 orange. What is the probability of: a) getting 3 yellow marbles, if 3 are taken at a time? b) getting 1 brown and 2 orange marbles, if 3 are taken at a time? a= 6/20* 5/19* 4/18 b=5/20* 2/19* 1/18

**Geometry**

Thank you! :)

**Geometry**

Line MP bisects <LMN, m<LMP=4x+3 and m<LMN=10x-6. Find m<LMN. I understand how to find adjacent angles and the complement. I don't understand what I am supposed to do? Since it already give you the answer 10x-6, should I solve for x?

**Algebra**

What is the square root of 58 to the nearest integer.

**geography**

Sun burns

**Science**

Which of the following questions is outside the scope of science? a. how are religion and philosophy different b.what is the diet of an american alligator c. how do humans digest protein d. how does gravity affect an airplane's motion

**Economics**

Consider a single price monopoly that faces a market demand curve for a good is given by the equation 𝑃=100−.1𝑄 and the total cost function is given as 𝑇𝐶=1000+20𝑄+.4𝑄2. a. What is the total fixed cost for this monopoly? P/...

**math**

Christine took out a 150-day loan for $2000 at 12% simple interest. After 60 days, she decided to make an early payment of $1000. What is the balance due on maturity date of the loan? (Round your answer to the nearest penny.)

**Maths**

Mr Sanderson makes some cookies for a festival day. She gave 1/4 of the cookies to her sister and 1/3 of the remainder to a neighbour. If she had 120 cookies left, how many cookies did she make in the beginning? Linda spent 1/4 of her money on books, 1/3 on food and 1/5 of the...

**math (PLZ HELP ASAP)**

After a drought, the Great Salt Lake in Utah covered an area of 2450 kilometers squared or 35/64 the area of the lake under normal weather conditions. Find the area of Great Salt Lake under normal weather conditions.

**Math**

X-3y=1 4x+5y=4 Solve the system of equations.

**Math**

A 100 point test contains a total of 20 questions. The multiple choice questions are worth 3 points each and the short response answer questions are worth 8 pints each. Write a system of linear equations that represents this situation, my answer is to correlate the 3 points ...

**Math**

So I'm doing solving system of equations, 2x+y=5 4x+2y=10 I found no solution that would fit it therefore they are parallel to each other. Am I correct?

**Math**

The feasible region shown below is bounded by lines 2𝑥 − 𝑦 = 2 , 𝑥 + 𝑦 = 2 , and y = 0. Find the coordinates of corner point A

**Math**

Jan is a 35-year-old individual who plans to retire at age 65. Between now and then $4000 is paid annually into her IRA account, which is anticipated to pay 5% compounded annually. How much will be in the account upon Jan’s retirement?

**Science**

It is B not A I just took the test

**English poem**

To expand and disagree slightly, the phosphorescence captures the image of the reflection of the lights of the headlights of the icy road, rather than the colours of the cars, which would probably not be readily apparent nor glowing at night.

**math**

Given the cost function, C(x), and the revenue function, R(x), find the number of units x that must be sold to break even. C(x)=86x+3080, R(x)+108x

**Equations and Inequalities Unit Test**

Y-5_<6

**Calculus III**

The surface x^2−y^2=36 can be described using spherical coordinates in the form ρ=g(θ,ϕ)=

**Calculus III**

Evaluate ∭W f(x,y,z)dV for the function f and region W specified: f(x,y,z) = 18(x+y) W: y≤ z≤x ; 0≤y≤x ; 0≤x≤1 ∭W (18(x+y))dV =

**Science**

how the volume of air in a tank of compressed air would change if the volume of the tank doubled? My answer was: The volume of the air would increase and it would be more difficult to fit inside of the tank depending on if the tank was filled or not.

**Math**

Lol Idk

**chemistry**

A viral preparation was inactivated in a chemical bath. The activation process was found to be first order in virus concentration. The beginning of the experiment 2% of the virus was found to be inactivated per minute. [i] Evaluate k for the inactivation process in units (1/s...

**History**

d.)The States raised and provided the soldiers in the army and navy, and Congress appointed all the officers.

**civics**

thank you so much i guess i needed help with that as well

**Physics**

A compact car of mass 915 kg has an overall motor efficiency of 16.0%. (a) If burning one gallon of gasoline supplies 1.34 108 J of energy, find the amount of gasoline used in accelerating the car from rest to 55.0 mi/h. Here you may ignore the effects of air resistance and ...

**Calculus III**

Compute the length of the curve r(t)=5ti+8tj+(t2+4)k over the interval 0≤t≤6 Hint: use the formula ∫t2+a2‾‾‾‾‾‾‾√dt=12tt2+a2‾‾‾‾‾‾‾√+12a2ln(t+t2+a2‾‾&#...

**Science**

Measure the temperature on the first and last day of April.

**math**

j.k

**Physics**

Car A and B are facing each other at rest, 100 m apart. Car A accelerates at 5 m/s^2. Car B accelerates at 3 m/s^2. When and where do they meet?

**geometry**

A circle has a center at (8,2). The point is (3,7) is on the circle. What is the area of the circle, to the nearest tenth of a square unit? A. 22.2 square units B. 44.4 square units C. 157.1 square units D.314.2 square units HELP PLEASE, and thanks.

**Geometry**

Would it be A then?

**Geometry**

What is the perimeter of rectangle WXYZ, with vertices W(-3,7), X(-5,4), Y(1,0), and Z(3,3) to the nearest unit. PLEASE HELP. A. 36 UNITS B. 30 UNITS C. 22 UNITS D. 11 UNITS

**Math**

Which of the following is an asymptote of f(x)=(x^2+3x+2)/(x+2)*tan(pi*x)? A) x=-2 B) x=-1 C) x=1/2 D) x=1 E) x=2 Answer is C but I got A because substituting x for -2 makes the graph undefined.

**Math**

I believe it's like: y-4=4x+3y y-4=-(9-x) 4x+3y=-(9-x)

**Math**

y-4=4x+3y=-(9-x) What is the value of xy?

**Math**

5x/3+y=c 2y=c-4x x+y=6 What is c? I've tried substituting y as x-6 however I'm still not getting it.

**Math**

Explain how the graph of f(x) = ln x can be used to obtain the graph of g(x) = e^(x-2).

**Science--HELP!!**

1. Electrons 2. Atomic Model 3. Covalent Bond 4. Chemical bond 5. Either energy level or shell 6. Atomic theory 7. Atomic number Your answers are correct though I'm not sure about number 5.

**macro**

Assume that the utility function of a consumer is given by U = ln c1 + ln c2 The interest rate is given by 5% and the endowments are given by (y1, y2) = (100, 120). (a) Draw the budget constraint. (b) Calculate the consumption and saving in period 1. (c) Draw the indifference ...

**Chemistry**

how many grams of Nano3 are in 0.755 moles of nano3

**7th grade math (probability)**

mark has $186 in his savings account. he withdraws $94, deposits $56,and then withdraws $70.

**math**

Sam had 80 foreign stamps and local stamps. After giving away13of his foreign stamps and 10 local stamps, he had an equal number of foreign stamps and local stamps left. How many local stamps did he have in the beginning?

**Phyisics**

1. Two concentric conducting spherical shells have radii of 0.126 m. and 0.225 m. The inner sphere bears a charge of -8.00E-08 C. An electron escapes from the inner sphere with negligible speed. Assuming that the region between the spheres is a vacuum, compute the speed (in ...

**Phyisics**

3. A small sphere whose mass is 8.00E-03 g. carries a charge of 7.00E-08 C. It hangs from a silk thread which makes an angle of 30 degrees with a large charged, nonconducting sheet. Calculate the surface charge density (in coulombs/meter^2) for the sheet.

**math**

Lexi and Maria had $250 altogether. After Lexi spent25of her money and Maria spent $40, they had the same amount of money left. How much money did Lexi have in the beginning?

**physics**

a car set out at noon to ride from point a to point b, and another car started at 2 pm on the same day to ride from point b to point a. they met on the road at 4:05 pm, and each car reached their destination at exactly the same time. at what time did the car arrive?(hint: both...

**physics**

4. A ball is thrown so that it just clears a 3m fence 18m away. If it left the hand 1.5m above the ground and at an angle of 60° with the horizontal, what was the initial velocity of the ball?

**algebra**

Can someone explain how he got to this conclusion? I understand he answer and everything, but if you had to show work what would you do?

**algebra**

y=46

**Language Arts**

9 is c not A

**math**

At what value(s) of x does f(x)=(-4x^4)+(2x^2) have a relative maximum?

**math**

For what values of x is the graph y=2/(5-x) concave upward? x<5 x>-5 x>5 no values of x

**L.A.**

i got all correct THANKS!!!

**Physics**

A 50 kg satellite circles the earth in an orbit with a period of 110 min. What minimum energy E is required to change the orbit to one with a period of 320 min? Assume both the initial and final orbits are circular. The Earth’s radius is 6.37 × 10^6 m, its mass is 5...

**Pre-Calc**

Through how many radians does a circle of radius 1 foot rotate if it rolls 10 feet down the road?

**math**

just answer my question

**math**

simplify: 6-y/6/1/6-1/y 6-y/6*6y/y-6= 6y/6=y Is this correct help i need help!!

**math**

thats my middle name

**math**

simplify: square root (4/3)-square root (3/4) A. 2-sqaure root(3)/2 square root (3) B. square root (7/12) C. square root (3)/6 D. 2/square root (3) which answer? this is what i got square root (16/12)- square root (9/12)= square root (7/12)

**college pre-calculus**

how do you do it

**math**

For the curve given by 4x^2+y^2=48+2xy, show that there is a point P with x-coordinate 2 at which the line tangent to the curve at P is horizontal.

**math**

For the curve given by 4x^2+y^2=48+2xy, find the positive y-coordinate given that the x-coordinate is 2.

**math**

For the curve given by 4x^2+y^2=48+2xy show that ((dy)/(dx))=(y-4x)/(y-x)

**Math**

The twice–differentiable function f is defined for all real numbers and satisfies the following conditions: f(0)=3 f′(0)=5 f″(0)=7 a)The function g is given by g(x)=e^ax+f(x) for all real numbers, where a is a constant. Find g ′(0) and g ″(0) in ...

**Fraction**

13+7 5/8 equals 5/8

**algebra**

someone know about adding and subtracting denominator

**algebra**

Perform the indicated operation y/y-5+5/5-y

**algebra**

Which of the following points lies on the circle whose center is at the origin and whose radius is 10 (-6,4) (/10,/10) (6,-8)

**algebra**

thank's

**algebra**

The length of a rectangle is 3 more than twice the width. The area of the rectangle is 119 square inches. What are the dimensions of the rectangle? If x = the width of the rectangle, which of the following equations is used in the process of solving this problem?

**plz help. math**

alright thank you

**algerbra**

/2

**algerbra**

A triangle has sides of and 3. Which could not be the length of the third side if it is a right triangle? i need help anyone?

**algebra**

Solve this quadratic equation x^2 + 5x + 3 = 0

**Science**

"What amount of Barium hydroxide is needed to neutralize 500 kg of 18 molar Sulphuric acid?"