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Recent problems solved by 'Alan3354'

Alan3354 answered: 30973 problems
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Exponents/516531: How do I solve I to the 11th power? thanks 1 solutions Answer 344386 by Alan3354(30993)   on 2011-10-17 16:43:16 (Show Source): You can put this solution on YOUR website! Solve for what? Equations are solved. There's no equal sign, so it's not an equation.

Travel_Word_Problems/516527: if i travel 75 mph how many miles will i cover in 10 hrs. 1 solutions Answer 344385 by Alan3354(30993)   on 2011-10-17 16:41:57 (Show Source): You can put this solution on YOUR website! d = r*t

Volume/516512: How many blocks, 2cm on each edge, can be stored in a box 10 cm on each edge 1 solutions Answer 344383 by Alan3354(30993)   on 2011-10-17 16:20:18 (Show Source): You can put this solution on YOUR website! 5 along each edge --> 5*5*5 = 125 ------- Or,

Mixture_Word_Problems/516521: How many liters of a 20% chemical solution must be mixed with 6 liters of a 15% chemical solution to give a 10% solution? 1 solutions Answer 344382 by Alan3354(30993)   on 2011-10-17 16:19:01 (Show Source): You can put this solution on YOUR website! Adding 20% to 15% will increase the concentration. Any mix will be between 15% and 20%, 10% is not possible.

Geometric_formulas/516490: The circular rim of a basket has a radius of 5 inches. How many feet of ribbon would it take to go once around the circular rim? use 3.14 to approximate. Round your answer to the nearest tenth. 1 solutions Answer 344380 by Alan3354(30993)   on 2011-10-17 16:12:09 (Show Source): You can put this solution on YOUR website! Circumference = 2*pi*r inches Divide by 12 to get feet

Percentage-and-ratio-word-problems/516510: covert the given amount to the given unit: 12hours; minutes 1000cm; km 45ft; yd 32 cups; gallons 30m;cm 15lbs; kilograms 42 in;cm 10 miles; km 25 ft; in 1 solutions Answer 344378 by Alan3354(30993)   on 2011-10-17 16:08:42 (Show Source): You can put this solution on YOUR website! You do them, we'll check your work.

Travel_Word_Problems/516473: If dan biked 27 miles yesterday. if he biked 3 times as far as joe , how far did joe bike 1 solutions Answer 344377 by Alan3354(30993)   on 2011-10-17 16:04:25 (Show Source): You can put this solution on YOUR website! If? If Joe biked, it's 1/3 of 27 miles.

test/516503: Help 1 solutions Answer 344376 by Alan3354(30993)   on 2011-10-17 16:00:31 (Show Source): You can put this solution on YOUR website! Catch this rope.

Probability-and-statistics/516506: The mean of 10 numbers is 8. If an 11th number is now included in the results, the mean becomes 9. What is the value of the 11th number? Produce an algebraic solution. 1 solutions Answer 344375 by Alan3354(30993)   on 2011-10-17 15:59:37 (Show Source): You can put this solution on YOUR website! 10*8 = 80 11*9 = 99 ----- 99 - 80 = 19

Travel_Word_Problems/516464: How long would it take a car to travel a distance of 1.5 miles at the rate of 220 miles per hour? d = r * t so we know the distance is 1.5 miles and the rate is 220 mph: 1.5 = 220t We need to isolate t so we divide each side of the equation by 220: 1.5/220 = t Simplify further: t = 0.0068 I don't understand where I went wrong! 1 solutions Answer 344373 by Alan3354(30993)   on 2011-10-17 15:56:04 (Show Source): You can put this solution on YOUR website! How long would it take a car to travel a distance of 1.5 miles at the rate of 220 miles per hour? d = r * t so we know the distance is 1.5 miles and the rate is 220 mph: 1.5 = 220t We need to isolate t so we divide each side of the equation by 220: 1.5/220 = t Simplify further: t = 0.0068 I don't understand where I went wrong! ------------------ It's not wrong, it's 0.0068 hours

Trigonometry-basics/516402: Write the trigonometric expression in terms of sine and cosine, and then simplify. tan(x)csc(x) 1 solutions Answer 344365 by Alan3354(30993)   on 2011-10-17 14:16:12 (Show Source): You can put this solution on YOUR website! tan(x)csc(x) = (sin/cos)*(1/sin) = 1/cos ------------ = sec(x)

Travel_Word_Problems/516391: A tennis ball is thrown vertically upward with an initial velocity of +7.4 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s2. Answer in units of m/s 1 solutions Answer 344363 by Alan3354(30993)   on 2011-10-17 14:14:03 (Show Source): You can put this solution on YOUR website! It will be the same.

Complex_Numbers/516409: Short Answer: Simplify the following expression, and rewrite it in an equivalent form with positive exponents. (-6x^-5)^-2 1 solutions Answer 344362 by Alan3354(30993)   on 2011-10-17 14:07:25 (Show Source): You can put this solution on YOUR website! (-6x^-5)^-2 = = ------------- What does "short answer" mean?

Travel_Word_Problems/516334: A car left seattle traveling 45mph. A second car left from the same place one hour later on the same road traveling 60mph. How long will it take the second car to catch up with the first car. Which of these is the correct second eqaution for the problem? 1 solutions Answer 344343 by Alan3354(30993)   on 2011-10-17 11:31:49 (Show Source): You can put this solution on YOUR website! A car left seattle traveling 45mph. A second car left from the same place one hour later on the same road traveling 60mph. How long will it take the second car to catch up with the first car. Which of these is the correct second eqaution for the problem? ---------------- The 1st car is 45 miles ahead when the 2nd car starts. The 2nd car gains on the 1st at 15 mi/hr (60-45) 45/15 = 3 hours to catch up.

Polygons/516328: the area of a regular polygon is 360 square cm. If the apothem is 9 cm and one side measures 16 cm, how many sides does this polygon have? 1 solutions Answer 344342 by Alan3354(30993)   on 2011-10-17 11:29:20 (Show Source): You can put this solution on YOUR website! the area of a regular polygon is 360 square cm. If the apothem is 9 cm and one side measures 16 cm, how many sides does this polygon have? ----------- Area using side length: Area = ns^2*cot(180/n)/4 For n = 4, Area = 256 For n = 5, Area = 440.44 --------------- The area increases with n, so there is no integral solution.

Travel_Word_Problems/516323: Dwight traveled 350 miles and averaged 70 miles per hour. How many minutes did he take to complete the trip? 1 solutions Answer 344337 by Alan3354(30993)   on 2011-10-17 10:35:59 (Show Source): You can put this solution on YOUR website! d = r*t t = d/r (in hours)

Linear_Algebra/516324: The solution to the following system is (-1,3). Find A and B. Ax-2y=4 5x+By=-1 1 solutions Answer 344332 by Alan3354(30993)   on 2011-10-17 10:20:48 (Show Source): You can put this solution on YOUR website! The solution to the following system is (-1,3). Find A and B. Ax-2y=4 A*-1 - 2*3 = 4 -A - 6 = 4 -A = 10 A = -10 -------------- 5x+By=-1 Find B the same way.

Linear-systems/516310: The solution of the following system is (-1, 3). Find A and B Ax-2y=4 5x=By=-1 1 solutions Answer 344327 by Alan3354(30993)   on 2011-10-17 09:44:30 (Show Source): You can put this solution on YOUR website! 5x=By=-1 --------- Too many equal signs

Word_Problems_With_Coins/516304: I have 2 coins in my hand. They equal 55 cents. One is not a nickle. What are the 2 coins? 1 solutions Answer 344324 by Alan3354(30993)   on 2011-10-17 09:29:57 (Show Source): You can put this solution on YOUR website! A 50-cent piece and a nickel.

Triangles/516194: what are the angle measures of a right triangle that has 2 congruent legs of 16 cm? About how long is its hypothenuse? 1 solutions Answer 344281 by Alan3354(30993)   on 2011-10-16 23:39:21 (Show Source): You can put this solution on YOUR website! The angles are 90, 45 & 45 degs Hyp = 16sqrt(2) cm

Numeric_Fractions/516196: how do i calculate 2 4/5-5 1/4 1 solutions Answer 344280 by Alan3354(30993)   on 2011-10-16 23:15:44 (Show Source): You can put this solution on YOUR website! 2 4/5-5 1/4 = 14/5 - 21/4 = 56/20 - 105/20 = -49/20 ----------- Or = 2.8 - 5.25 = -2.45

Triangles/516192: a triangle has angle measures of 26, 64 and 90 degreese.If its shortest side is 10 cm about how long is its hypothenuse? 1 solutions Answer 344277 by Alan3354(30993)   on 2011-10-16 23:07:59 (Show Source): You can put this solution on YOUR website! sin(26) = 10/hyp hyp = 10/sin(26) =~ 22.812 cm

Travel_Word_Problems/516032: At noon, Sheila left a boat landing and paddled her canoe 20 km downstream and 20 km back. If she traveled 10km/h downstream and 4km/h upstream what time did she arrive at the landing?? 1 solutions Answer 344227 by Alan3354(30993)   on 2011-10-16 19:36:37 (Show Source): You can put this solution on YOUR website! Avg speed = 2*10*4/(10+4) = 40/7 km/hr 40 km roundtrip at 40/7 km/hr takes 7 hours Noon + 7 = 1900

Complex_Numbers/516016: what do you get when you factor the polynomial x^3+3x^2+9x+27 1 solutions Answer 344226 by Alan3354(30993)   on 2011-10-16 19:27:49 (Show Source): You can put this solution on YOUR website! (x+3)*(x^2+9)

decimal-numbers/515984: What is the percentage equivalent of 1.4 x 10 to the 16 th power. 1 solutions Answer 344221 by Alan3354(30993)   on 2011-10-16 18:47:04 (Show Source): You can put this solution on YOUR website! = %

absolute-value/515991: 3+|x+1|=6 1 solutions Answer 344220 by Alan3354(30993)   on 2011-10-16 18:45:57 (Show Source): You can put this solution on YOUR website! 3+|x+1|=6 |x+1|=3 ------- Case 1: x+1 = 3 x = 2 ----- Case 2: -(x+1) = 3 x = -4

Volume/516004: An aquarium is 60 centimeters long, 20 centimeters wide, and 30 centimeters high. What volume of water does the aquarium have if it is only 2/3 full? 1 solutions Answer 344219 by Alan3354(30993)   on 2011-10-16 18:40:34 (Show Source): You can put this solution on YOUR website! (2/3)*60*20*30 cc

Proportions/515985: how do you solve this: 2.3:3:____ •variable is empty... not an equation 1 solutions Answer 344216 by Alan3354(30993)   on 2011-10-16 18:26:36 (Show Source): You can put this solution on YOUR website! Solve it for what?

Quadratic_Equations/515939: how to solve x^2-y^2 1 solutions Answer 344215 by Alan3354(30993)   on 2011-10-16 18:25:39 (Show Source): You can put this solution on YOUR website! Solve for what?

Travel_Word_Problems/515955: If you are traveling at 70 mph, and there is no wind, how fast is the air going by you 1 solutions Answer 344214 by Alan3354(30993)   on 2011-10-16 18:23:44 (Show Source): You can put this solution on YOUR website! If you mean the windspeed relative to the Earth is zero, then it's 70 mph. -------- If you mean there is no wind relative to the vehicle, then the air goes by at zero mi/hr.

Polynomials-and-rational-expressions/515948: A 30" TV set has a width of 24". What is its height? 1 solutions Answer 344213 by Alan3354(30993)   on 2011-10-16 17:06:45 (Show Source): You can put this solution on YOUR website! Hint: It's the 3, 4, 5 triangle times 6.