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Question 207751: really struggling on this
use composite rule to differentiate the function
f(x)=exp (2/3 sin x)
Click here to see answer by Alan3354(69443)

Question 207703: okay i have one question that i'm not sure how to set up.
1. The lengths of the sides of a triangle are in the ratio 5:6:7. describe the length of the longest side if the perimeter is less that 54 cm.
Click here to see answer by rfer(16322)

Question 207778: alexi throws a pebble into a unused well. the distance D,the pebble falls after t seconds is given by the equation d=16tsquared + 56T, where d is measured in feet. if the water in the well is 240 feet below ground level,how many secconds will it take for the pebble to hit the water?
Click here to see answer by stanbon(75887)

Question 207798: Please help me with this problem:
Write and solve an equation to find the value of x.
4.8, 1.6, 5.2, x; mean 3.7
Thanks!
Click here to see answer by vleith(2983)

Question 207825: A plane leaves the airport heading east at an airspeed of 250 miles per hour, then turns back and returns at an airspeed of 220 miles per hour. If the plane can stay in the air 9 hours, how far can it travel?
Click here to see answer by Alan3354(69443)

Question 207952: Please solve this formula for the given variable.
P=F/A
Solve for A. Then, Solve for F.
Thanks!
Click here to see answer by checkley77(12844)

Question 208075: The width of a rectangle is one-half of the length. The perimeter of the rectangle is 90. What are the dimensions of the rectangle?
Click here to see answer by checkley77(12844)

Question 207964: Please solve this formula for the given variable.
b+3/e=f/2
solve for e
Please show your work.
Thanks!
Click here to see answer by checkley77(12844)

Question 208744: (4a^3b^3)(4ab^2)^2
Click here to see answer by RAY100(1637)

Question 208806: Find the distance between the two points.

M(1,-3),N(3,5)

thank you
Click here to see answer by Alan3354(69443)

Question 209180: Suppose M is between L and N. Use the segment addition postulate to solve for this variable. Then find the lengths of LM MN and LN

LM 7y+9

MN= 3y+4

LN = 143

thank you
Click here to see answer by nyc_function(2741)

Question 208814: Use the distance formulas to decide whether line JKL approximately equals line KL.

J (3,-5)

K (-1,2)

L (-5,-5)

thank you
Click here to see answer by Alan3354(69443)

Question 209883: A living room is 20 ft by 21 ft. What is its perimeter?
Click here to see answer by solver91311(24713)

Question 210331: Well it's about physics. The topic is ENERGY. Can you please help me answer this problem?
A 15 kg child sits in a swing that is attached to ropes 1.6 m long. Find the potential energy of the child relative to his lowest position when the ropes (a) are horizontal, (b) are vertical, and (c) make 30 degrees with the horizontal.
Thank you very much..
Click here to see answer by scott8148(6628)

Question 210422: if 18 is subtracted from six times a certain number, the result is 96. Find the number.
Click here to see answer by tutor_paul(519)

Question 208366: factor completely ax^3+27a
Click here to see answer by vleith(2983)

Question 210730: how many 4 inch by 8 inch bricks are needed to build a walk 6 ft wide and 24 feet long?
Click here to see answer by Earlsdon(6294)

Question 210718: DJ Joe wants to organize 127 CD�s into storage boxes. Each storage box can hold a maximum of 10 CD�s. What is the least number of storage boxes needed?
(1) 10 (3) 12
(2) 11 (4) 13
Click here to see answer by Earlsdon(6294)

Question 210928: Tany saved a dollor in the first month. She saved b dollors in the second month. The money she saved the third month was the sum of money that she saved in the first and second month.the money she saved in the fourth month was the sum of the money she saved in the second and third months and so on. If she had saved $280 in the ninth month, rhat were the values of a and b given that they were whole numbers?

Click here to see answer by Theo(13342)

Question 211094: a) For the quadratic equation kx^2 + 2x + 4 = 0, find the value of k so that
the roots are equal (there is only one root).
b) The roots of x^2 + (k + 8)x + 9k = 0 are equal. What are the value(s) of
k?
Click here to see answer by ankor@dixie-net.com(22740)

Question 207961: Evaluating a ratioal expression, can you help me with this,
-2x -8
X2+2x-8

Click here to see answer by rapaljer(4671)

Question 190146: What is the slope of a binomial 2x+3?
Click here to see answer by rapaljer(4671)

Question 211553: 1.6,4.8,5.2,x
find x if the mean is 3.7
Click here to see answer by rfer(16322)

Question 202666: Given U = {21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31}, A = {21, 23, 25, 27, 29}, and
B = {22, 25, 28, 29}. Find A′ U B′.

Click here to see answer by HyperBrain(694)

Question 204550: Hi there, I have an exam today and I was doing a practise exam where I came across this question and was unable to solve it. Could one of the tutors please help me with it, I'd be more than grateful!!!!
Scientists have 50g of a radioactive element that decomposes with a half-life of 15 seconds. (3 marks:1 mark each)
a) Write an equation that predicts the amount of the element remaining as a function of time.
b) How much of the element would remain after 2 minutes?
c) How long would the element take to decompose to the point where there is only 0.01g remaining?
Click here to see answer by nerdybill(7384)

Question 212132: The value of a car varies according to the formula:

V = 20,000e^-(t/12)
where V is the value in �'s and t is its age in years from new.
a) State its value when new.
b) Find its value (to the nearest �) after 4 years.
c) Sketch the graph of V against t.
Click here to see answer by Fombitz(32388)

Question 212825: The students at King High School are in grades 9, 10, 11, and 12. Of all of the students, 1/4 are in grade 9, 1/3 are in grade 10, and 1/6 are in grade 11. If there are 300 students in grade 12, how many are in grade 11?
Click here to see answer by stanbon(75887)

Question 212822: Matt has 50 cookies to give to his class. There were three kinds of cookies; chocolate chip, M&M, and sugar cookies. There are twice as many sugar cookies as chocolate chip cookies and two more M&M cookies than there are chocolate chip cookies. Write the system and find out how many of each type of cookie he brought.
Click here to see answer by aggie_tutor(13)

Question 213148: What is 5.814 and 23.238 in radical form? I forgot how to convert it.

Click here to see answer by drj(1380)

Question 213257: Find three consecutive odd numbers such that the difference of five times the third number and three times the first number is 54. Separate your answers with a comma. No space between all inputs.
Click here to see answer by checkley77(12844)

Question 213255: Solve the system of three equations: a-b+6c=8, 3a-b+6c=14, -a-2b-3c=7. Write your answer as ordered triple.
Click here to see answer by checkley77(12844)

Question 213253: Solve the system: (1/2)x-(1/6)y=10, (2/5)x+(1/2)y=8. Write your answer as aan ordered pair.

Click here to see answer by checkley77(12844)

Question 213339: if i purchased $45.40 worth of petrol at $1.49 pre litre how many litres did i buy?
Click here to see answer by Earlsdon(6294)

Question 213467: A pitcher can throw a baseball 95 miles per hour. The ball travels at that speed for 56 feet, until it arrives at the batter. How many seconds, correct to the nearest thousandth of a second, does the batter have from the moment the ball is thrown, until it arrives.
Click here to see answer by josmiceli(19441)

Question 213762: Suppose gold is selling at $375/ounce. How many milligrams of gold could you buy for one cent?
Click here to see answer by Alan3354(69443)

Question 214118: what is -31divided by 1.5=-20.66
Click here to see answer by thinkingeye(11)

Question 214526: A block of platinum is 21.45g/cm^3. Calculate its density in kilograms per cubic meter.
Click here to see answer by stanbon(75887)

Question 214603: Element QX has 3 naturally occurring isotopes. QX-18 occurs 72.03% of the time, Qx-17 occurs 22.94% of the time and Q-16 occurs 5.03% of the time. What is the average atomic mass number that would be reported on the periodic table?

thank you
Click here to see answer by edjones(8007)

Question 214661: Professor Sum has a total of 56 students. One-half of his students study languages ... 28 students study languages (of the 28, seven of them study French), and One-seventh study Physics, so 8 students study Physics.

Click here to see answer by stanbon(75887)

Question 214746: Galina spent $3.60 for stamps to mail packages. Some were 30� stamps and the rest were 20� stamps. The number of 20� stamps was 2 less than the number of 30� stamps. How many stamps of each kind did Galina buy?
Click here to see answer by drj(1380)

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