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Question 1031483: Find the equation of the line containing the points (2,3) and (4,1)
Click here to see answer by josgarithmetic(39617)

Question 1031510: 4 times the square root of 9/3 + 3 times square root 3/9 - 5 times the square root 27
Click here to see answer by mananth(16946)

Question 1031431: A traffic light shows red for 3 minutes 30 seconds orange for 30 seconds for every minutes that green light shows. paul saw the light on his way to work. what is the probability that it is
a. red
b. green
c. orange
d.orange or red
e. not red
f. blue
g. not blue
Click here to see answer by ikleyn(52781)

Question 1031633: The car park length is 15cm. The scale is 1:100. What is the actual length of the car park in metres?
Click here to see answer by Alan3354(69443)

Question 1031637: The main area. Hall has dimensions of 200m by 85m. On a large diagram the scale is 1:40
What are the dimensions of the floor space in cm
Click here to see answer by stanbon(75887)

Question 1031638: 1 member of staff to 150 in audiene.how many people are there in the audience if 20 members of staff is needed
Click here to see answer by stanbon(75887)

Question 1031639: 21,000 was split at the ratio of 2:5 between Areana and Phil
How much did the arean make from phil
Click here to see answer by stanbon(75887)

Question 1031639: 21,000 was split at the ratio of 2:5 between Areana and Phil
How much did the arean make from phil
Click here to see answer by MathTherapy(10552)

Question 1031666: Please help me with this problem:
determine the are between the graph of y = and the x axis over the interval [0,1]. (the function is nonnegative over this interval.)
Click here to see answer by Fombitz(32388)

Question 1030859: I already did all my work and I need someone to check it for me please and thank you
http://a63.tinypic.com/2nprn6.jpg
http://a67.tinypic.com/14ikd8g.jpg
http://a68.tinypic.com/34gn9xg.jpg
Click here to see answer by Fombitz(32388)

Question 1031693: The road was Rocky, so after running for awhile at 10 km/h Clytemnestra slowed to a five kilometer per hour walk if the total trip was 65 kilometers and she made it in 9 hours how far did she walk and how far did she run?
Click here to see answer by mananth(16946)

Question 1031694: 800 liters of a 79% glycol solution was available. How much pure glycol should be extracted so that the remainder would be only 30% glycol
Click here to see answer by josmiceli(19441)

Question 1031695: Somewhere fast and the rest were slow. 10 times the number of fast was a hundred and forty less than twice the number of slow. Also half the number of slow exceeded three times the number of fast by 10. How many were fast and how many were slow?
Click here to see answer by fractalier(6550)

Question 1031923: Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula.
2sin(θ/2)cos(θ/2)
Click here to see answer by Alan3354(69443)

Question 1031344: The estimated value of the integral from 1 to 3 of x squared dx , using the trapezoidal rule with 4 trapezoids is
17.50
11.25
8.75
5.63
Click here to see answer by robertb(5830)

Question 1031345: Which of the following values would be obtained using 10 inscribed rectangles of equal width (a lower sum) to estimate the integral from 0 to 1 of x squared, dx?
0.285
0.385
1.380
2.310
Click here to see answer by robertb(5830)

Question 1031346: Which definite integral approximation formula is the integral from a to b of f of x, dx is approximately equal to the product of the quantity b minus a over n and the quantity y sub 1 plus y sub 2 plus y sub 3 plus dot dot dot plus y sub n minus 1 plus y sub n?
Left rectangles
Right rectangles
Average rate of change
Trapezoidal rule
Click here to see answer by robertb(5830)

Question 1031351: Given the table below for selected values of f(x), use 6 trapezoids to estimate the value of
the integral from 1 to 10 of f of x dx.
_______________________
x |1|3|4|6 |7 |9 |10
f(x)|4|8|6|10|10|12|16
_______________________
Click here to see answer by robertb(5830)

Question 1031352: Function f(x) is positive, increasing and concave down on the closed interval [a, b]. The interval [a, b] is partitioned into 4 equal intervals and these are used to compute the left sum, right sum, and trapezoidal rule approximations for the value of the integral from a to b of f of x dx Which one of the following statements is true?
Trapezoidal rule value < Left sum < Right sum
Left sum < Trapezoidal rule value < Right sum
Right sum < Trapezoidal rule value < Left sum
Cannot be determined without the x‐values for the partitions
Click here to see answer by robertb(5830)

Question 1031967: (2x+5)^4+(2x+1)^4=82 [Hint: Put (2x+3)=y]
Click here to see answer by Edwin McCravy(20055)

Question 1031988: Please help solve this quadratic equation using the quadratic formula.

Click here to see answer by stanbon(75887)

Question 1032010: Is (1,5) a solution to the function y=-2x-3?
Click here to see answer by ikleyn(52781)

Question 1032015: What's the rate of change, y intercept and x intercept for these equations y=6-2/3x, 3(2x-8)=6y, 120=y+4x
Click here to see answer by stanbon(75887)

Question 1032080: Evelyn wants to build a triangle out of craft sticks. she has two crafts sticks to use for two sides of the triangle. one craft stick is 5cm long and the other is 8cm long, which of the following cannot be the length of the craft stick that she will use for the third side of the triangle?
a. 4cm
b. 9cm
c. 12cm
d. 14cm
Click here to see answer by josmiceli(19441)

Question 1032082: one side of the triangle is 4cm and the sum of the other two sides is equal to a whole number of cm. what is the smallest possible perimeter of the triangle?
a. 9cm
b. 10cm
d. 11cm
d. 15cm
e. 17cm
Click here to see answer by robertb(5830)

Question 1032081: Angus ordered a rug fro his bathroom. it arrived in a tube that measured 36in in length. the radius of the tube was 4in. to the nearest whole number, what is the tube's approximate surface area? use pi =3.14
a. 1005in square
b. 90in square
c. 85sin square
d. 80in square
Click here to see answer by robertb(5830)

Question 1032189: Can you create me a graph of a quadratic equation that has a positive discriminant for me to reference?
Please & ty
Click here to see answer by rothauserc(4718)

Question 1032265: y=8+4(3+2)-6�2

Click here to see answer by addingup(3677)

Question 1032274: use the differential equation given by dy/dx=xy/3, y > 0.
Find the particular solution y = f(x) to the given differential equation with the initial condition f(0) = 4.
Click here to see answer by robertb(5830)

Question 1032285: Newton�s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75�F which is placed into a refrigerator with temperature of 38�F can be modeled by dT/dt=k(T-38) where T(t) is the temperature of the lemonade after t minutes and T(0) = 75. After 30 minutes the lemonade has cooled to 60�F, so T(30) = 60.
To the nearest minute, how long does it take for the lemonade to cool to 55�F?
Click here to see answer by robertb(5830)

Question 1032278: Newton�s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75�F which is placed into a refrigerator with temperature of 38�F can be modeled by dT/dt=k(T-38) where T(t) is the temperature of the lemonade after t minutes and T(0) = 75. After 30 minutes the lemonade has cooled to 60�F, so T(30) = 60.
To the nearest degree, what is the temperature of the lemonade after an additional 30 minutes?
Click here to see answer by robertb(5830)

Question 1032257: A circular two tiered wedding cake needs to be frosted. Each tier is 4in high. The bottom tier has a radius of 8in. The top tier has a radius of 3in. Find the surface area of the wedding cake that needs to be frosted. Assume both tiers will be frosted all around, including the bottom. Use 3.14 for pi.
1. Find the surface area of the bottom tier
2. find the surface area of the top tier.
Click here to see answer by Cromlix(4381)

Question 1032283: Newton�s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75�F which is placed into a refrigerator with temperature of 38�F can be modeled by dT/dt=k(T-38) where T(t) is the temperature of the lemonade after t minutes and T(0) = 75. After 30 minutes the lemonade has cooled to 60�F, so T(30) = 60.
To the nearest minute, how long does it take for the lemonade to cool to 55�F?
Click here to see answer by Fombitz(32388)

Question 1032282: Newton�s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75�F which is placed into a refrigerator with temperature of 38�F can be modeled by dT/dt=k(T-38) where T(t) is the temperature of the lemonade after t minutes and T(0) = 75. After 30 minutes the lemonade has cooled to 60�F, so T(30) = 60.
To the nearest minute, how long does it take for the lemonade to cool to 55�F?
Click here to see answer by Fombitz(32388)

Question 1032281: Newton�s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75�F which is placed into a refrigerator with temperature of 38�F can be modeled by dT/dt=k(T-38) where T(t) is the temperature of the lemonade after t minutes and T(0) = 75. After 30 minutes the lemonade has cooled to 60�F, so T(30) = 60.
To the nearest degree, what is the temperature of the lemonade after an additional 30 minutes and To the nearest minute, how long does it take for the lemonade to cool to 55�F?
Click here to see answer by Fombitz(32388)

Question 1032280: Newton�s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75�F which is placed into a refrigerator with temperature of 38�F can be modeled by dT/dt=k(T-38) where T(t) is the temperature of the lemonade after t minutes and T(0) = 75. After 30 minutes the lemonade has cooled to 60�F, so T(30) = 60.
To the nearest degree, what is the temperature of the lemonade after an additional 30 minutes and To the nearest minute, how long does it take for the lemonade to cool to 55�F?
Click here to see answer by Fombitz(32388)

Question 1032279: Newton�s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75�F which is placed into a refrigerator with temperature of 38�F can be modeled by dT/dt=k(T-38) where T(t) is the temperature of the lemonade after t minutes and T(0) = 75. After 30 minutes the lemonade has cooled to 60�F, so T(30) = 60.
To the nearest degree, what is the temperature of the lemonade after an additional 30 minutes and To the nearest minute, how long does it take for the lemonade to cool to 55�F?
Click here to see answer by Fombitz(32388)

Question 1032277: Newton�s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75�F which is placed into a refrigerator with temperature of 38�F can be modeled by dT/dt=k(T-38) where T(t) is the temperature of the lemonade after t minutes and T(0) = 75. After 30 minutes the lemonade has cooled to 60�F, so T(30) = 60.
To the nearest degree, what is the temperature of the lemonade after an additional 30 minutes?
Click here to see answer by Fombitz(32388)

Question 1032276: Newton�s law of cooling states that the rate of cooling of an object is proportional to the temperature difference between the object and its surroundings. So the rate of cooling for a bottle of lemonade at a room temperature of 75�F which is placed into a refrigerator with temperature of 38�F can be modeled by dT/dt=k(T-38) where T(t) is the temperature of the lemonade after t minutes and T(0) = 75. After 30 minutes the lemonade has cooled to 60�F, so T(30) = 60.
To the nearest degree, what is the temperature of the lemonade after an additional 30 minutes?
Click here to see answer by Fombitz(32388)

Question 1032294: Hello there, I understand that this is not a chemistry site. I was just wondering whether any of you with a chemistry background could help me with the following question. Thank you
Firstly I know what hess law is but I need to know how it is applied to chemical processes
Click here to see answer by addingup(3677)

Question 1032137: Solve each equation for x.
(a) 30 = 80(1 − e^−2x)
(b) 5 � 2^x = 3^ (x−1)
(c) log2(log3 x) = 5
(d) e^{− 1/2 log(x^2−1) }=1/sqrt 3
Click here to see answer by Alan3354(69443)

Question 1032350: what if when you do the pythagorean theorem it gives you zero but the question asks you to round your answer?
Click here to see answer by solver91311(24713)

Question 1032350: what if when you do the pythagorean theorem it gives you zero but the question asks you to round your answer?
Click here to see answer by Theo(13342)

Question 1032351: what would you complete the square because it is still confusing after I did it?

Click here to see answer by solver91311(24713)

Question 1032290: Hello there, I understand that this is not a chemistry site, but I was just wondering whether any of you with a chemistry background could help me with the following question. Thank you
Write the equation for the standard enthalpy of combustion?
Click here to see answer by ikleyn(52781)

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