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Recent problems solved by 'Earlsdon'

Earlsdon answered: 6281 problems
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Rectangles/563805: the width of the rectangle shown is 18 inches.the length is 4 feet.what is the area of the rectangle in square feet? 1 solutions Answer 365057 by Earlsdon(6287)   on 2012-01-27 21:34:39 (Show Source): You can put this solution on YOUR website! Convert 18 inches to feet by dividing it by 12. ft. Now multiply 1.5 ft by 4 ft to get the area. sq.ft.

Money_Word_Problems/563809: how much would 20% of $400 dollars be? 1 solutions Answer 365056 by Earlsdon(6287)   on 2012-01-27 21:25:16 (Show Source): You can put this solution on YOUR website! 20% of $400.00 = 0.2(400) = $80.00

Quadratic_Equations/563740: f(x)=25x^2+10x+1 type an ordered pair I got 1 for y I got -1/5 for x The answer isn't an ordered pair though. Could someone please help me out. Thank You 1 solutions Answer 365055 by Earlsdon(6287)   on 2012-01-27 21:23:23 (Show Source): You can put this solution on YOUR website! Rewrite this as: To get y = 1 as you did, you must have let x = 0, why? because: So the ordered pair is: (0, 1) And if you solved this quadratic equation, you would get: Set y = 0. Factor the left side. so... which is a double solution. So when , , the ordered pair would be: (,) But note that there is an infinite number of ordered pairs that satisfy this equation.

Conjunction/563420: Hi there. Could you help me with this probability question please.... Each individual letter of the word TENNESSEE is placed on a piece of paper and all 9 pieces of paper are placed in a hat. If one letter is selected at random from the hat, determine the probability that the letter V is not selected. Thank you 1 solutions Answer 364871 by Earlsdon(6287)   on 2012-01-26 21:10:08 (Show Source): You can put this solution on YOUR website! Since there are no V's in the hat to begin with, the probability of not selecting a V is 100%.

Polygons/560370: The sum of a regular polygon's angle measures is 1440 degrees. What is the measure of one of the angles of the regular polygon? 1 solutions Answer 363862 by Earlsdon(6287)   on 2012-01-21 15:45:31 (Show Source): You can put this solution on YOUR website! The sum (S) of the interior angles of a polygon of n sides is given by: and S is given as 1440 so... Divide both sides by 180. Add 2 to both sides. The regular polygon has 10 sides. An interior angle (A) of a regular polygon of n sides is given by: But and n = 10: degrees.

Divisibility_and_Prime_Numbers/560364: A square has area 18225 square feet. What is the perimeter of the square. Could you please how me a step by step how to complete this problem 1 solutions Answer 363860 by Earlsdon(6287)   on 2012-01-21 15:25:21 (Show Source): You can put this solution on YOUR website! If the area of a square is 18225,the length of one side (s) is: The perimeter p is 4(s), so...

Average/560278: how do u solve a question that state ; a student has scores of 88, 92, and 86 on first 3 tests. whats score must he get on the forth so her average is 90 1 solutions Answer 363826 by Earlsdon(6287)   on 2012-01-21 10:39:37 (Show Source): You can put this solution on YOUR website! Let the score on the fourth(sp) test be x, then: Add the integers and multiply both sides by 4. Subtract 266 from both sides.

expressions/559664: please help me solve this equation -8 + 5 (g + 2) + -2 1 solutions Answer 363497 by Earlsdon(6287)   on 2012-01-19 17:23:54 (Show Source): You can put this solution on YOUR website! First, this is not an equation, it's an expression and you can't "solve" an expression. Did you want to simplify this expression? -8+5(g+2)+(-2) First, apply the distributive property to the middle term. -8+5g+10+(-2) Now combine like-terms. -8+10-2+5g simplify. 0+5g The answer is 5g.

Graphs/559671: write a rule for linear functions with graphs containing the foollowing pairs of points. (-6,4) and (3,-8) 1 solutions Answer 363495 by Earlsdon(6287)   on 2012-01-19 17:16:58 (Show Source): You can put this solution on YOUR website! You could write the rule in the form of a "slope-intercept" linear equation: by finding the slope; Use the x- and y-coordinates of the two given points (-6, 4) and (3, -8) as the inputs. so you have: To find b, substitute the x- and y-coordintes from either one of the given points. Say (3, -8). Add 4 to both sides. now you write the finished equation (rule):

Complex_Numbers/559672: Subtract: (10 - 2i) - (4 - 3i) 1 solutions Answer 363491 by Earlsdon(6287)   on 2012-01-19 17:05:07 (Show Source): You can put this solution on YOUR website! =

Surface-area/559493: The perimeter of a square is 1 foot, how many square inches cover it's area? 1 solutions Answer 363440 by Earlsdon(6287)   on 2012-01-19 11:25:36 (Show Source): You can put this solution on YOUR website! 1 square foot = (12")*(12")square inches = 144 square inches. ---------------------------------------------------------- The above answer is not correct. I was thinking that the square was 1 foot on a side, but if the perimeter is 1 foot, then the side must measure one fourth of that, or 3 inches. The area of a 3-inch square would be 3" X 3" = 9 square inches. My apologies for the mistake.

Square-cubic-other-roots/559492: √63 + √7 + √64 = ? The correct answer is 4√7 + 8, but I can't figure out how to get it. Thanks 1 solutions Answer 363438 by Earlsdon(6287)   on 2012-01-19 11:21:01 (Show Source): You can put this solution on YOUR website! Simplify: = or so... = or

Age_Word_Problems/558743: A boy is 26 years older than his father. in 3 years time, his age would be a third of the father's age. Find the boy's present age. 1 solutions Answer 363154 by Earlsdon(6287)   on 2012-01-17 21:36:45 (Show Source): You can put this solution on YOUR website! I don't quite understand how a boy can be 26 years older than his father? Did you mean to write: A boy is 26 years younger than his father? Let B = the boy's present age and F = the father's present age: 1) 2) Substitute 2a) Multiply through by 3 to clear the fraction. 2b) Simplify. 2c) 2d) 2e) and = The boy is 10 years old and the father is 36 years old.

Rational-functions/558732: Shelly throws her keys up into the air, releasing them from a height of 4 ft. above the ground with an initial velocity of 32 ft/sec. a. Write and equation representing the height of the keys in terms of time? Above on the WS it gives two equations for velocity both equaling h-height. This is why i am confused. 1 solutions Answer 363147 by Earlsdon(6287)   on 2012-01-17 21:21:25 (Show Source): You can put this solution on YOUR website! Start with the function for the height, as a function of time, (h(t), of an object propelled upwards from an initial height of with an initial velocity of . where: g (acceleration due to gravity) = 32ft/sec.squared. Substitute: and . Note that the negative comes from the fact that gravity is acting downward.

Mixture_Word_Problems/558464: Sara is mixing together a fruit punch for a party. She's made 6 gallons of punch with a mixture of 50% juice. Her mother tells her to change it to a mixture of 60% juice. How much fruit juice should be added to make the mixture 60% fruit juice (round to the nearest hundredth)? A)0.4 gallons B)0.6 gallons C)1.5 gallons D)2.1 gallons 1 solutions Answer 363068 by Earlsdon(6287)   on 2012-01-17 15:43:31 (Show Source): You can put this solution on YOUR website! Let x = the required number of gallons of pure juce (100% juice) to be added to the 6 gallons of 50% juice mixture. 0.5(6)+x = 0.6(x+6) Simplify. 3+x = 0.6x+3.6 Subtract 0.6x from both sides. 3+0.4x = 3.6 Subtract 3 from both sides. 0.4x = 0.6 Finally, divide both sides by 0.4 x = 1.5 gallons.

Triangles/558466: A triangle contains a 75 angle. Is the triangle equiangular? Explain your answer. 1 solutions Answer 363067 by Earlsdon(6287)   on 2012-01-17 15:34:28 (Show Source): You can put this solution on YOUR website! No, it isn't! If it were equiangular, it would have three 60-degree angles.

Quadratic_Equations/558158: susan drops her camera in the river from a bridge that is 400 feet high. How long is it before she hears the splash? 1 solutions Answer 362968 by Earlsdon(6287)   on 2012-01-16 21:56:14 (Show Source): You can put this solution on YOUR website! Initial velocity, and initial height, ft. When the camera hits the water, h = 0, so... Divide by 16. Take the square root. seconds, neglecting the time it takes for the sound of the splash to travel the 400 feet to Susan's ears.

Travel_Word_Problems/558168: a bullet train can travel very fast if a bullet train can go 150 miles in 90 minutes, what is the speed of the train in miles per hour 1 solutions Answer 362966 by Earlsdon(6287)   on 2012-01-16 21:43:40 (Show Source): You can put this solution on YOUR website! 90 minutes = 1.5 hours. 150 miles/1.5 hours = 100mph.

Mixture_Word_Problems/558207: how many 14 gallon containers can i fill with 405 gallons of water? 1 solutions Answer 362962 by Earlsdon(6287)   on 2012-01-16 21:35:12 (Show Source): You can put this solution on YOUR website! You could "fill" 28 14-gallon containers and you would have almost 1 gallon (0.92857) left over.

Travel_Word_Problems/558214: how fast do i have to go if i need to bike 95 miles in 15 hours? 1 solutions Answer 362960 by Earlsdon(6287)   on 2012-01-16 21:31:24 (Show Source): You can put this solution on YOUR website! mph.

Percentage-and-ratio-word-problems/558217: Hello again: I was very pleased with your previous answer to a word problem you sent to me. This one is a little different but would like to also have a format to work future problems of the same. this is the problem: Larry Mitchell invested part of his 40,000 advance at 4% annual simple interest and the rest 3% annual simple interest. If both account was 1,330 Find the amount invested at each rate 1 solutions Answer 362958 by Earlsdon(6287)   on 2012-01-16 21:28:30 (Show Source): You can put this solution on YOUR website! Let x = the amount invested at 4% then the rest (40,000-x) is the amount invested at 3%. The earnings on these two amounts is given as 1,330. This situation can be expressed by the following equation, after converting the percentages to their decimal equivalents: 0.04x+0.03(40,000-x) = 1,330 Simplify. 0.04x+1200-0.03x = 1,330 0.01x+1200 = 1,330 Subtract 1200 from both sides. 0.01x = 130 Divide both sides by 0.01 x = 13000 and 40,000-x = 27,000 Larry Mitchell invested 13,000 at 4% and 27,000 at 3%.

Polynomials-and-rational-expressions/557747: No matter how I work this I feel as though I am getting it wrong... Solve 8/x+8 = 7/x-2 1 solutions Answer 362742 by Earlsdon(6287)   on 2012-01-15 22:38:08 (Show Source): You can put this solution on YOUR website! Solve for x: Cross-multiply. Simplify. Subtract 7x from both sides. Add 16 to both sides.

Equations/557738: Please help me solve this. Well since I already have the answer, it would be helpful if you could show me the steps to take to get the answer. The answer is , if that is at all helpful to you. The worksheet has examples but I have no idea where some of the numbers came from. Thank you so much. 1 solutions Answer 362740 by Earlsdon(6287)   on 2012-01-15 22:31:01 (Show Source): You can put this solution on YOUR website! = This is not the answer that you have given but did you mean to write: ? = which matches your answer.

Polynomials-and-rational-expressions/557743: I am so confused on how to do this. Please Help! Find all numbers for which the rational expression is undefined: 9/5x+1 1 solutions Answer 362739 by Earlsdon(6287)   on 2012-01-15 22:20:18 (Show Source): You can put this solution on YOUR website! For the expression to be undefined, it is necessary for the denominator be equal to zero. Set the denominator equal to zero and solve for x. Subtract 1 from both sides. Divide by 5. For the expression is undefined. Substitute = Undefined!

Money_Word_Problems/557701: Hello i have a problem with the current problem. The problem is this: Jen invested $6000, part at 10% and the rest at 5%. If the annual income from both investments was the same, find her total annual income from both investments. The choices include: A)$200 B)$250 C)$300 D)$350 E)$400 1 solutions Answer 362727 by Earlsdon(6287)   on 2012-01-15 21:03:11 (Show Source): You can put this solution on YOUR website! If x = the amount Jen invested at 10%, then the remainder (6000-x) was invested at 5%. The earnings on these two amounts are equal, so... 0.1x = 0.05(6000-x) Simplify and solve for x. 0.1x = 300-0.05x Add 0.05x to both sides. 0.15x = 300 Divide both sides by 0.15 x = 2000 and 6000-x = 4000 The interest earned on the $2000 at 10% = 0.1(2000) = $200 The interest earned on the $4000 at 5% = 0.05(4000) = $200 The total interest earned = $400

Geometric_formulas/557664: If the formula for Volume of a cone is v=1/3*pi*r^2*h how do I find for h or r? 1 solutions Answer 362726 by Earlsdon(6287)   on 2012-01-15 20:51:37 (Show Source): You can put this solution on YOUR website! To solve for h, divide both sides by Simplify: To solve for r, divide both sides by : Simplify: Now take the square root of both sides.

Equations/557481: Four more than the quotient of a number and 3 is 11. I don't get this. 1 solutions Answer 362626 by Earlsdon(6287)   on 2012-01-15 12:18:48 (Show Source): You can put this solution on YOUR website! Let n be the number you are looking for. The quotient of a number (that's n) and 3 is expressed by: but you need four more than that so you just add 4 to get: Multiply through by 3 to clear the fraction. Simplify. Subtract 12 from both sides.

Money_Word_Problems/557477: in planning her retirement, lliza deposits some money at 4% interest, with twice as much deposited at 4.5%. find the amount deposited at each rate in the total annual interest income is 2340. 1 solutions Answer 362625 by Earlsdon(6287)   on 2012-01-15 12:13:44 (Show Source): You can put this solution on YOUR website! If x = the smaller amount deposited and 2x = the larger amount, you can express the earnings on these two amounts, after converting the percentages to their decimal equivalents, as follows: 0.04x+0.045(2x) = 2340 Simplify and solve for x. 0.04x+0.09x = 2340 0.13x = 2340 x = 18000 and... 2x = 36000 So Lliza(?) deposited 18,000 (dollars or pounds or...?) at 4% interest and 36,000 at 4.5% interest.

Length-and-distance/557473: whats bigger 1.25m or 1200cm 1 solutions Answer 362622 by Earlsdon(6287)   on 2012-01-15 12:03:04 (Show Source): You can put this solution on YOUR website! 1.25m or 1200cm? Convert the meters to centimeters. 1.25m(100cm/m) = 125cm, so... So which is bigger? 125cm or 1200cm?

Mixture_Word_Problems/557444: You have 30L of a 60% acid solution, how many liters of acid do you need to add to have a solution that has a concentration of 80%? 1 solutions Answer 362608 by Earlsdon(6287)   on 2012-01-15 10:26:54 (Show Source): You can put this solution on YOUR website! Let x = the required number of liters of acid to be added to the 30 liters of 60% acid solution to obtain 30+x liters of 80% acid solution. You can set up the equation to solve for x like this: 30(0.6)+x = (30+x)(0.8) Simplify and solve for x. 18+x = 24+0.8x Subtract 0.8x from both sides. 18+0.2x = 24 Now subtract 18 from both sides. 0.2x = 6 Finally, divide both sides by 0.2 x = 30 liters.

Points-lines-and-rays/557442: The perimeter of a rectangle is 1000 feet. Three times the length is equal to five times the width. Determine the length and width. 1 solutions Answer 362607 by Earlsdon(6287)   on 2012-01-15 10:13:31 (Show Source): You can put this solution on YOUR website! Start with: P = 2(L+W) as the formula for the perimeter, P, of a rectangle with length, L, and width, W. P = 2(L+W) Substitute P = 1000 and L = 5W. 1000 = 2(5W+W) Simplify. 1000 = 2(6W) 1000 = 12W Divide both sides by 12. and...