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Recent problems solved by 'jim_thompson5910'

jim_thompson5910 answered: 28583 problems
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Functions/351838: f (10) (10)+6+3 - all under square root. the answer I got was 19 square root. but the book says the answer is 7. help please. 1 solutions Answer 251408 by jim_thompson5910(28595)   on 2010-10-04 18:25:30 (Show Source): You can put this solution on YOUR website! So

expressions/351829: I need help with this problem 9-((-5)-7) 1 solutions Answer 251402 by jim_thompson5910(28595)   on 2010-10-04 17:53:45 (Show Source): You can put this solution on YOUR website! 9-((-5)-7) = 9-(-12) = 9+12 = 21 So 9-((-5)-7) = 21

expressions/351825: I am needing help on the following problems: 4x-5y+9+2x-y-14 -12x+y+7-(-x)+9y+(-7) -x+2y+8x-5y+(+(-6x-)-4y 4-(7y)+7x-14+y-1 thanks!! 1 solutions Answer 251401 by jim_thompson5910(28595)   on 2010-10-04 17:52:29 (Show Source): You can put this solution on YOUR website! 1) 4x-5y+9+2x-y-14 = (4x+2x)+(-5y-y)+(9-14) = 6x-6y-5 2) -12x+y+7-(-x)+9y+(-7) = (-12x+x)+(y+9y)+(7-7) = -11x+10y 3) -x+2y+8x-5y+(+(-6x-)-4y .... you must have a typo here... 4) 4-(7y)+7x-14+y-1 = (7x)+(-7y+y)+(4-1-14) = 7x-6y-11

Graphs/351692: given f(p) = p^2 - 4p + 7 and the transformation y = -f(p-2) + 5 find the formula for this transformation and describe how this transformation moves the original function, f(p) thanks 1 solutions Answer 251394 by jim_thompson5910(28595)   on 2010-10-04 17:26:06 (Show Source): You can put this solution on YOUR website! Hint: To find f(p-2), replace each 'p' with 'p-2' and simplify. To calculate -f(p-2), just negate each term of f(p-2). Finally, add 5 to get -f(p-2)+5. If you graph each step, you'll see the transformations.

Expressions-with-variables/351758: Factor each of the following expressions and then simplify, if possible: 5 + 5x x^2 + x 1 solutions Answer 251393 by jim_thompson5910(28595)   on 2010-10-04 17:23:12 (Show Source): You can put this solution on YOUR website! 1) Factor out the GCF 5 to get 2) Factor out the GCF 'x' to get Now if the problem is actually , then Or simply put

Equations/351782: 1. 3n-5= -8(6+5n) 2. -(1+7x) -6 (-7-x)= 36 3. -5(1-5x) +5 (-8-2)= -4x-8x If you can provide step by step, that would be very helpful. Thanks a lot!! 1 solutions Answer 251392 by jim_thompson5910(28595)   on 2010-10-04 17:20:38 (Show Source): You can put this solution on YOUR website! # 1 Start with the given equation. Distribute. Add to both sides. Add to both sides. Combine like terms on the left side. Combine like terms on the right side. Divide both sides by to isolate . Reduce. -------------- Answer: So the answer is ============================================================== # 2 Start with the given equation. Distribute. Combine like terms on the left side. Subtract from both sides. Combine like terms on the right side. Divide both sides by to isolate . Reduce. --------------------- Answer: So the answer is ============================================================== # 3 Start with the given equation. Distribute. Combine like terms on the left side. Combine like terms on the right side. Add to both sides. Add to both sides. Combine like terms on the left side. Divide both sides by to isolate . -------------------- Answer: So the answer is which approximates to .

Surface-area/351792: a circle of 50 flags surrounds the washington monument in dc. the diameter of the circle is about 238 feet. about how far apart are the flags if they are evenly spaced? 1 solutions Answer 251391 by jim_thompson5910(28595)   on 2010-10-04 17:17:03 (Show Source): You can put this solution on YOUR website! Hint: Find the circumference of the circle and divide that distance by 50 to find the amount of space is between each flag.

Square-cubic-other-roots/351796: what is the square root of 80 simplified 1 solutions Answer 251390 by jim_thompson5910(28595)   on 2010-10-04 17:15:37 (Show Source): You can put this solution on YOUR website! which simply means that

Travel_Word_Problems/351797: If a train travels 60 kms an hour how far can it travel in 5 mins, 10mins, 20 mins? 1 solutions Answer 251389 by jim_thompson5910(28595)   on 2010-10-04 17:14:01 (Show Source): You can put this solution on YOUR website! Throughout the problem, Use to get a) 5 mins: 5 minutes = hours So So the train travels 5 km in 5 minutes ------------- b) 10 mins: 10 minutes = hours So So the train travels 10 km in 10 minutes Starting to see a pattern? --------- a) 20 mins: 20 minutes = hours So So the train travels 20 km in 20 minutes Note: If a train is traveling 60 kph, then in 'x' minutes it has traveled 'x' kilometers.

Trigonometry-basics/351793: How to find three ordered pairs satisfying y= -3x+5 thanks 1 solutions Answer 251387 by jim_thompson5910(28595)   on 2010-10-04 17:10:04 (Show Source): You can put this solution on YOUR website! Pick any 3 x values and plug them into the given equation to find the corresponding y values x=0: So when x=0, y=5 which means we have the ordered pair (0,5) x=1: So when x=1, y=2 which means we have the ordered pair (1,2) x=2: So when x=2, y=-1 which means we have the ordered pair (2,-1)

Trigonometry-basics/351791: Find the value(s)of x for which f(x)=g(x) f(x)=x^2+16x+19 g(x)= 8x+7 1 solutions Answer 251386 by jim_thompson5910(28595)   on 2010-10-04 17:07:44 (Show Source): You can put this solution on YOUR website! Start with the given equation. Plug in and Get all terms to the left side. Combine like terms. Notice we have a quadratic equation in the form of where , , and Let's use the quadratic formula to solve for x Start with the quadratic formula Plug in , , and Square to get . Multiply to get Subtract from to get Multiply and to get . Take the square root of to get . or Break up the expression. or Combine like terms. or Simplify. So the answers are or

Quadratic-relations-and-conic-sections/351795: what is 4x+8y-16=0 1 solutions Answer 251385 by jim_thompson5910(28595)   on 2010-10-04 17:06:15 (Show Source): You can put this solution on YOUR website! What do you want to do here? Please post the full instructions. Thanks.

Angles/351794: How do i figure out x and y when i have vertical angles? I have 3 numbers here, and I'm using the star as a degree sign. 2y* (x+5)* and 3x* It'd help alot :) 1 solutions Answer 251384 by jim_thompson5910(28595)   on 2010-10-04 17:05:51 (Show Source): You can put this solution on YOUR website! Which angles are the vertical angles? Do you have a picture that you can show us?

Radicals/351726: I need help with the following problem please: 6 radical 175 1 solutions Answer 251334 by jim_thompson5910(28595)   on 2010-10-04 14:58:02 (Show Source): You can put this solution on YOUR website! So

Linear_Algebra/351727: what is the standard deviation of the numbers 77,65,59,77,63,60,77 1 solutions Answer 251331 by jim_thompson5910(28595)   on 2010-10-04 14:56:35 (Show Source): You can put this solution on YOUR website! Hint: Step 1) Find the mean Step 2) Find the differences of the mean from each data value Step 3) Square each difference Step 4) Add up those squares Step 5) Divide that sum by n-1 (where n is the number of numbers in the data set) Step 6) Take the square root of the result from step 5 to get the standard deviation Alternatively, you can use a calculator to calculate the standard deviation.

Functions/351725: f(x)=-3x+4 and g(x)=-x^2+4x+1 what is g (-2) hey thanks alot for your time 1 solutions Answer 251329 by jim_thompson5910(28595)   on 2010-10-04 14:54:16 (Show Source): You can put this solution on YOUR website! Start with the given equation. Plug in x=-2 Square -2 to get 4 Multiply Combine like terms.

Radicals/351721: Hello I need help with a problem. I need to Simplify each expression. All variables represent positive numbers. Sqrt = radical sign. sqrt 8a^9/b^3 1 solutions Answer 251325 by jim_thompson5910(28595)   on 2010-10-04 14:51:48 (Show Source): You can put this solution on YOUR website! Hints: Use the identities and Also... which means that which means that which means that

real-numbers/351720: FInd the additive inverse of each of the following: (-2)^5 -2^5 1 solutions Answer 251324 by jim_thompson5910(28595)   on 2010-10-04 14:48:35 (Show Source): You can put this solution on YOUR website! The additive inverse of is The additive inverse of is

Expressions-with-variables/351614: How do you make this an algerbraic expression..five inches less than eight times your height in inches 1 solutions Answer 251321 by jim_thompson5910(28595)   on 2010-10-04 14:47:27 (Show Source): You can put this solution on YOUR website! Let h = your height So "five inches less than eight times your height" translates to

Functions/351718: Find the domain of f(x)=sqrt(2x^2-3x-20) 1 solutions Answer 251317 by jim_thompson5910(28595)   on 2010-10-04 14:42:24 (Show Source): You can put this solution on YOUR website! Hint: The domain of is . So the domain of is the set of x values that satisfy the inequality

Linear-equations/351715: what is the slope of. 3x-8y=4 1 solutions Answer 251315 by jim_thompson5910(28595)   on 2010-10-04 14:41:09 (Show Source): You can put this solution on YOUR website! Start with the given equation. Subtract from both sides. Rearrange the terms. Divide both sides by to isolate y. Break up the fraction. Reduce. So the equation is now in slope intercept form where the slope is and the y-intercept is note: the y-intercept is the point

Travel_Word_Problems/351494: Please help me solve this word problem: A railroad track is laid along the arc of a circle of radius 1800ft. The circular part of the track subtends a central angle of 40 degrees. How long (in seconds) will it take a point on the front of a train traveling 30 mph to go around this portion of the track? I know I need to draw a triangle and show degrees and the length of a side, I don't know which side needs to be labeled and where the curved railroad tract fits in. I would greatly appreciate any help you can give me. Thank you. 1 solutions Answer 251141 by jim_thompson5910(28595)   on 2010-10-04 00:32:11 (Show Source): You can put this solution on YOUR website! The basic idea here is to find the length of the track. You do this by calculating the circumference of the circle (imagine that this track creates a whole circle). Once you have the circumference, multiply it by to find the length of the track that subtends 40 degrees. When you have the length of the track, use the formula (distance = rate*time) to calculate the time it takes to travel that given distance at 30 mph. Let me know if this helps. If you need more help, email me at jim_thompson5910@hotmail.com Also, feel free to check out my tutoring website Jim

Complex_Numbers/351402: Here is the expression and answer, I have tried to solve this but I cannot come up with the same answer that was given to me from the teacher. I need to write this in standard form. The answer given was 12-13i (5-7i) - (-7+6i) 1 solutions Answer 251088 by jim_thompson5910(28595)   on 2010-10-03 19:49:18 (Show Source): You can put this solution on YOUR website! Start with the given expression. Distribute the negative. Group like terms. Combine like terms. So So the expression is now in standard form where and If you need more help, email me at jim_thompson5910@hotmail.com Also, feel free to check out my tutoring website Jim

Probability-and-statistics/351386: A card is drawn and a die is thrown. Find the following probabilities: a) Drawing a spade and rolling a four b) Rolling an odd number and drawing an odd numbered card c) Rolling a factor of 12 and drawing a card that is a factor of twelve (exclude 1 in both cases) 1 solutions Answer 251084 by jim_thompson5910(28595)   on 2010-10-03 19:38:56 (Show Source): You can put this solution on YOUR website! a) P(Spade and rolling a 4) = P(Spade)*P(rolling a 4) = (13/52)*(1/6) = 13/312 Note: There are 13 spade cards out of a total of 52. So P(Spade) = 13/52. Also, I'm assuming that we're rolling a 6 sided die, which means that P(Rolling a 4) = 1/6 b) P(Rolling an odd number and drawing an odd numbered card) = P(Rolling an odd number) * P(Drawing an odd numbered card) = (3/6)*(16/52) = 48/312 = 2/13 Note: There 3 odd numbers on a die (1, 3, 5) out of 6. So P(Rolling an odd number) = 3/6 Also, the odd numbered cards are: 3, 5, 7, 9 and there are 4 suits. So there are 4*4 = 16 odd cards out a total of 52. So P(Drawing an odd numbered card) = 16/52 c) I'll let you tackle this one. Let me know if you need help on it.

Equations/351382: Please help me solve this equation: (3/4)x-3=6 1 solutions Answer 251077 by jim_thompson5910(28595)   on 2010-10-03 19:17:57 (Show Source): You can put this solution on YOUR website! Start with the given equation. Multiply EVERY term by the LCD to clear any fractions. Multiply and simplify. Add to both sides. Combine like terms on the right side. Divide both sides by to isolate . Reduce. ---------------------------------------------------------------------- Answer: So the solution is If you need more help, email me at jim_thompson5910@hotmail.com Also, feel free to check out my tutoring website Jim

Probability-and-statistics/351381: A bag containing 5 red balls, 3 blue balls and 2 yellow balls. A ball is drawn and not replaced. A second ball is drawn. Find the probabilty of drawing: a) Two red balls b) One blue ball and one yellow ball c) Two yellow balls d) A red ball and a blue ball 1 solutions Answer 251075 by jim_thompson5910(28595)   on 2010-10-03 19:11:00 (Show Source): You can put this solution on YOUR website! a) P(Two red) = P(Red)*P(Red after one is drawn) = (5/10)(4/9) = 20/180 = 1/9 b) P(One blue and one yellow) = P(blue) * P(yellow after one draw) = (3/10)(2/9) = 6/90 = 1/15 c) P(Two yellow) = P(yellow)*P(yellow after one is drawn) = (2/10)(1/9) = 2/90 = 1/45 d) P(One red and one blue) = P(red) * P(blue after one draw) = (5/10)(3/9) = 15/90 = 1/6

Equations/351377: Hi, I am having trouble answering this problem -5x-10=2-(x+4) I'm not sure if I'm supposed to multiply the 2 and x then the 2 and 4 using the distributive property. Or if I'm supposed to subtract 2 from x and 4. I tried subtracting and got the answer of 3.5, but then I checked the problem and it was wrong. ( I tried using the distributive property, but subtracting instead of multiplying.) I am very confused can you please help me by going through the steps? Very much appreciated, Kayla. 1 solutions Answer 251072 by jim_thompson5910(28595)   on 2010-10-03 19:02:38 (Show Source): You can put this solution on YOUR website! Start with the given equation. Distribute. Combine like terms on the right side. Add to both sides. Add to both sides. Combine like terms on the left side. Combine like terms on the right side. Divide both sides by to isolate . Reduce. ---------------------------------------------------------------------- Answer: So the solution is If you need more help, email me at jim_thompson5910@hotmail.com Also, feel free to check out my tutoring website Jim

Polynomials-and-rational-expressions/351365: How do you factor 2y^2-15y+12? 1 solutions Answer 251071 by jim_thompson5910(28595)   on 2010-10-03 19:00:47 (Show Source): You can put this solution on YOUR website! Looking at the expression , we can see that the first coefficient is , the second coefficient is , and the last term is . Now multiply the first coefficient by the last term to get . Now the question is: what two whole numbers multiply to (the previous product) and add to the second coefficient ? To find these two numbers, we need to list all of the factors of (the previous product). Factors of : 1,2,3,4,6,8,12,24 -1,-2,-3,-4,-6,-8,-12,-24 Note: list the negative of each factor. This will allow us to find all possible combinations. These factors pair up and multiply to . 1*24 = 24 2*12 = 24 3*8 = 24 4*6 = 24 (-1)*(-24) = 24 (-2)*(-12) = 24 (-3)*(-8) = 24 (-4)*(-6) = 24 Now let's add up each pair of factors to see if one pair adds to the middle coefficient : First Number Second Number Sum 1 24 1+24=25 2 12 2+12=14 3 8 3+8=11 4 6 4+6=10 -1 -24 -1+(-24)=-25 -2 -12 -2+(-12)=-14 -3 -8 -3+(-8)=-11 -4 -6 -4+(-6)=-10 From the table, we can see that there are no pairs of numbers which add to . So cannot be factored. =============================================================== Answer: So doesn't factor at all (over the rational numbers). So is prime. If you need more help, email me at jim_thompson5910@hotmail.com Also, feel free to check out my tutoring website Jim

Probability-and-statistics/351343: If there are 14 boys and 11 girls in a room what would be the probability of my randomly selecting a girl/ 1 solutions Answer 251057 by jim_thompson5910(28595)   on 2010-10-03 18:12:58 (Show Source): You can put this solution on YOUR website! P(Girl) = Number of girls/Total number of students = If you need more help, email me at jim_thompson5910@hotmail.com Also, feel free to check out my tutoring website Jim

Linear_Equations_And_Systems_Word_Problems/351030: A defense attorney charges her client $4000 plus $120 per hour. The formula R =120n + 4000 gives her revenue in dollars for n hours of work. What is her revenue for 100 hours of work? What is her revenue for 101 hours of work? By how much did the one extra hour of work increase the revenue? 1 solutions Answer 250900 by jim_thompson5910(28595)   on 2010-10-02 22:13:40 (Show Source): You can put this solution on YOUR website! What is her revenue for 100 hours of work? Revenue is dollars What is her revenue for 101 hours of work? Revenue is dollars By how much did the one extra hour of work increase the revenue? One extra hour of work increases the revenue by dollars. If you need more help, email me at jim_thompson5910@hotmail.com Also, feel free to check out my tutoring website Jim

Linear-equations/351010: I need to find the y-intecept for is equation -2x+2y=12. 1 solutions Answer 250879 by jim_thompson5910(28595)   on 2010-10-02 20:15:01 (Show Source): You can put this solution on YOUR website! y-intercept To find the y-intercept, plug in and solve for y Start with the given equation. Plug in . Multiply and 0 to get 0. Simplify. Divide both sides by to isolate . Reduce. So the y-intercept is . If you need more help, email me at jim_thompson5910@hotmail.com Also, feel free to check out my tutoring website Jim