MATH QUESTION URGENT HELP!?
p + d + q = 44 (p = pennies, d = dimes, q = quarters) also: p = d Using values in cents so I don't have to have decimal fractions p + 10d + 25q = 437 using the p = d relation and the first one, we get: d + d + q = 44 or: q = 44 -2d we then substitute d + 10d + 25 ( 44 -2d) = 437 converts to: 11d + 1100 - 50d = 437 1100 - 39d = 437 ( collect d terms) 663 = 39d (subtracting 437 from each side, adding 39d to each side) 17 = d 17 = p 10 = q checking answer: 17 + 170 + 250 = 437 works.
Urgent! Help with math question..?
A quadrilateral shape has 360 deg as the total sum of it's angles, a pentagon 540 degs and a hexagon 720 degs. So the way to calculate the missing angle is to take away the sum of those you have from the total. So:- 1/ 42 + 75 + 118 = 235 360 - 235 = 125 2/ 116 +138 + 94 + 88 = 436 540 - 436 = 104 3/ 95 + 154 + 80 + 145 + 76 = 550 720 - 550 = 170
HELP URGENT MATH QUESTION?
In mountainous areas, reception of radio and television is sometimes poor. Consider an idealized case where a hill is represented by the graph of the parabola y = x − x2, a transmitter is located at the point (−4, 3), and a receiver is located on the other side of the hill at the point (x0, 0). What is the closest the receiver can be to the hill while still maintaining unobstructed reception? (Round your answer to three decimal places.)
Urgent!: Math Question What is 3/11 of 132???? Please Help?
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Urgent Maths Question! Please help me quick!!!?
[Note: quilasheila has missed a factor of 1/4...] f(x) = (((x^2 + 2x + 1) / 4) - 8) ^ (1/3) => f'(x) = (1/3) (((x^2 + 2x + 1) / 4) - 8) ^ (-2/3) . d/dx (((x^2 + 2x + 1) / 4) - 8) by the chain & power rules = (1/3) (((x^2 + 2x + 1) / 4) - 8) ^ (-2/3) . (1/4) d/dx (x^2 + 2x + 1) by the rules for constants (adding or multiplying) = (1/3) (((x^2 + 2x + 1) / 4) - 8) ^ (-2/3) . (1/4) (2x + 2) by the power rule again. = (1/6) (((x^2 + 2x + 1) / 4) - 8) ^ (-2/3) . (x + 1) For the second question: "Magnesium-27 has a half-life of 9.45 minutes. What is the decay constant for Magnesium-27? Round to five decimal places." The decay constant is λ such that the equation for the number of particles remaining after time t is given by N(t) = N(0) e^(-λt). We know thet N(9.45) = 1/2 N(0), so we get 1/2 N(0) = N(0).e^(-λ(9.45)) so 9.45λ = ln 2 and hence λ = 0.07335 to 5 d.p.
Math question urgent help? stuck on equation?
The vertices of quadrilateral PQRS are P(0,5),Q(-9,22),R(-5,8) and S(4,2) Show that PQRS is not a triangle? next question 2 An error has been made setting out the square base of a building. The coordinates listed for the corners of the square are (60,20) (90,120) (-10,140) (-40,50) which coordinate pair is incorrect? Explain your choice. What should the coordinates be? write a report explaning what the error is, how it was detected and how it should be corrected.
Maths motion question. URGENT HELP please?
This is actually easier than it looks. Acceleration is defined as a = change in velocity / change in time The change in velocity of the train is -10 mi/h (minus because the velocity decreased) between the time the engine reached the signal and the time the rear of the train reached the signal. The time during which it decelerated was 20 seconds (the time interval between the engine reaching the signal and the rear of the train reaching the signal). So a = -10 mi/h / 20 sec = -10mi/h / (20/3600 h) (converting sec to h) = - 1800 mi/h^2 The fact that the train is 1/4 of a mile long is irrelevant. ___ EDIT: And if it's ACcelerating at -1800 mi/h^2, then it is DEcelerating at 1800 mi/h^2.
Mathematics question.. URGENT HELP NEEDED!!?
Films at the cinema and films on television are shown at different speeds. Cinema: 24 pictures per second Television: 25 pictures per second At the cinema a film lasts for 175 minutes. How many minutes does the same film last on television? SOMEONE PLEASE GIVE ME THE ANSWER AND TELL ME HOW YOU GOT IT!! Thanks in advance :D
Can you help me with this math question to help my sister?
So, Peter starts out with X crops, which is 100% (by definition of what a 100% means). He the harvested 40% of X, leaving him with 60% of X. He then counts how much crops he still has to harvest and arrives at 150. This means he knows that 60% \times X = 150.Numerically, 60% is represented by the number .6, so we have:[math].6 \times X = 150[/math]Or [math]X = \frac{150}{.6} [/math]Simply putting that in a calculator will give you the total amount of crops (X, 100%). You then simply calculate X - 150 and you will get the number of crops harvested.