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# Recent problems solved by 'Alan3354'

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 Volume/587902: what is the volume and surface area of a solid that has a height of 9yd and a base of 2yd?1 solutions Answer 374294 by Alan3354(30937)   on 2012-03-16 22:56:48 (Show Source): You can put this solution on YOUR website!what is the volume and surface area of a solid that has a height of 9yd and a base of 2yd? -------------- What sort of solid?
 expressions/587913: P=2L+2W W=?1 solutions Answer 374293 by Alan3354(30937)   on 2012-03-16 22:55:38 (Show Source): You can put this solution on YOUR website!P=2L+2W W=? ------------ 2W = P - 2L W = (P - 2L)/2 or W = (P/2) - L
 Money_Word_Problems/587904: I really just cannot figure this out. I divided 132 by 22, got 6. Then I multiplied 6 by 15 and got 540. That was not an answer choice. Please help!(: 30. Lee worked 22 hours this week and made \$132. If she works 15 hours next week at the same pay rate, how much will she make? Thank you for helping me out in advance!1 solutions Answer 374292 by Alan3354(30937)   on 2012-03-16 22:53:50 (Show Source): You can put this solution on YOUR website!I really just cannot figure this out. I divided 132 by 22, got 6. Then I multiplied 6 by 15 and got 540. That was not an answer choice. Please help!(: 30. Lee worked 22 hours this week and made \$132. If she works 15 hours next week at the same pay rate, how much will she make? ----------------- 6*15 = \$90, not 540
 t e s t/587906: I had this questions on a clep prep study guide and am not sure how to solve it. If 1n x=6 and 1n y=2 then 1n (xsquared/y)= The answer key says the answer is 10, and I am not sure how they got that answer. Can you help me please? Thanks sara1 solutions Answer 374291 by Alan3354(30937)   on 2012-03-16 22:51:19 (Show Source): You can put this solution on YOUR website!If 1n x=6 and 1n y=2 then 1n (xsquared/y)= ------------- = 2*6 - 2 = 10 ------------- It looks like you have 1n, not ln It's ln (LN), for natural log
 Travel_Word_Problems/587880: if its now 2:30 what time was it 2 hours and 57 minutes ago 1 solutions Answer 374284 by Alan3354(30937)   on 2012-03-16 21:24:01 (Show Source): You can put this solution on YOUR website!if its now 2:30 what time was it 2 hours and 57 minutes ago ------- 2.5 hours ago it was 1200 27 mins before that makes it 11:33
 Square-cubic-other-roots/587890: Simplify: ^5√x^14 How do i simplify it?1 solutions Answer 374283 by Alan3354(30937)   on 2012-03-16 21:22:53 (Show Source): You can put this solution on YOUR website!Simplify: ^5√x^14 How do i simplify it? ------------ I think you mean: =
 expressions/587846: Please help me to solve this problem!! Evaluate the expression. (-9)(-3)(-3)1 solutions Answer 374262 by Alan3354(30937)   on 2012-03-16 18:02:24 (Show Source): You can put this solution on YOUR website!Evaluate the expression. (-9)(-3)(-3) ------------- (-3)*(-3) = 9 ---- (-9)*9 = -81
 Triangles/587856: What time is 10 minutes before 10 hours after 10 A.M1 solutions Answer 374261 by Alan3354(30937)   on 2012-03-16 18:00:31 (Show Source): You can put this solution on YOUR website!What time is 10 minutes before 10 hours after 10 A.M ----------- 10 hrs after 1000 is 2000 10 mins before that is 1950, or 7:50 PM
 Angles/587848: how do u do the those triangle problem that is in a math problem LiKe 4 EXAMPLE: A triangle has measuring 25* and 35*. What is the measure of the triangle third angle? 1 solutions Answer 374260 by Alan3354(30937)   on 2012-03-16 17:46:36 (Show Source): You can put this solution on YOUR website!how do u do the those triangle problem that is in a math problem LiKe 4 EXAMPLE: A triangle has measuring 25* and 35*. What is the measure of the triangle third angle? --------------- The sum of the angles of all triangles = 180 degs.
 Angles/587837: Algebra1 solutions Answer 374259 by Alan3354(30937)   on 2012-03-16 17:45:41 (Show Source): You can put this solution on YOUR website!I've heard of that.
 Trigonometry-basics/587834: How do I prove this identity: (1 + cos x)/(sin x) + (sin x)/(cos x) = (cos x + 1)/(sin x cos x)1 solutions Answer 374257 by Alan3354(30937)   on 2012-03-16 17:39:29 (Show Source): You can put this solution on YOUR website!How do I prove this identity: (1 + cos x)/(sin x) + (sin x)/(cos x) = (cos x + 1)/(sin x cos x) --------------- Simplify it until it's a common identity. Eliminate the fractions first. There's no formula, no single approach. Just do it.
 Distributive-associative-commutative-properties/587827: use the distributive law to multiply 7(a+8+5b) = I think the answer is 7a +56 + 35B but not sure1 solutions Answer 374246 by Alan3354(30937)   on 2012-03-16 16:32:58 (Show Source): You can put this solution on YOUR website!use the distributive law to multiply 7(a+8+5b) = I think the answer is 7a +56 + 35B but not sure ------------ That's right, if b = B
 Graphs/587825: 2x-y=7 x+2y+6 I kind of get how to do this but i dont know where they get the numbers for x, and y1 solutions Answer 374245 by Alan3354(30937)   on 2012-03-16 16:31:42 (Show Source): You can put this solution on YOUR website!2x-y=7 x+2y+6 I kind of get how to do this but i dont know where they get the numbers for x, and y ----------- You only have one equation. x+2y+6 has no equal sign --> not an equation.
 Surface-area/587807: What is the surface area of a 3-dimmensional cube that has a height of 10, a base of 12, & a width of 6 ? 1 solutions Answer 374244 by Alan3354(30937)   on 2012-03-16 16:30:41 (Show Source): You can put this solution on YOUR website! What is the surface area of a 3-dimmensional cube that has a height of 10, a base of 12, & a width of 6 ? ------------ It has 6 faces. 2 are 10 by 12 2 are 10 by 6 2 are 12 by 6
 Linear-equations/587826: What is the slope of the line (-1,3) and (-1,-2) I know it is undefined but what is the actual slope?1 solutions Answer 374243 by Alan3354(30937)   on 2012-03-16 16:29:24 (Show Source): You can put this solution on YOUR website!What is the slope of the line (-1,3) and (-1,-2) I know it is undefined but what is the actual slope? ----------- It's undefined, or infinite. slope = diffy/diffx diffx = 0 slope = diffy/0 --> undefined
 logarithm/587789: y =e^x/1+x i dont understand the e i can't find an example in my book1 solutions Answer 374241 by Alan3354(30937)   on 2012-03-16 16:27:26 (Show Source): You can put this solution on YOUR website!y =e^x/1+x i dont understand the e i can't find an example in my book ------------- e is the base of natural logs. google natural logs
 Average/587813: i have a 75% in my math class. we just took our exam. our exam is worth 15% of our grade. i got a 45% on my exam. what is my overall grade for the trimester now?1 solutions Answer 374236 by Alan3354(30937)   on 2012-03-16 16:09:39 (Show Source): You can put this solution on YOUR website!i have a 75% in my math class. we just took our exam. our exam is worth 15% of our grade. i got a 45% on my exam. what is my overall grade for the trimester now? ---------- 75*85 + 45*15 = OG*100 Solve for OG, Overall Grade
 Linear-equations/587814: x-4y=8 solve for y=mx+b then plot1 solutions Answer 374235 by Alan3354(30937)   on 2012-03-16 16:08:12 (Show Source): You can put this solution on YOUR website!x-4y=8 solve for y=mx+b then plot -------------- Solve for y, not for y=mx+b. -------------- Then pick 2 values for x and find y. Plot the 2 points, draw a line thru them.
 Quadratic_Equations/587809: Find p(-3)for the function p(x)=4x^4+8x^3-2x^2+13x+10? 1 solutions Answer 374234 by Alan3354(30937)   on 2012-03-16 15:30:19 (Show Source): You can put this solution on YOUR website!Find p(-3)for the function p(x)=4x^4+8x^3-2x^2+13x+10? ------------- Sub -3 for each x, add them up.
 Linear-systems/587803: 9x = 7x + 101 solutions Answer 374233 by Alan3354(30937)   on 2012-03-16 15:29:19 (Show Source): You can put this solution on YOUR website!9x = 7x + 10 -------------- Hint: Subtract 7x from both sides.
 logarithm/587793: y = e^8x cos(x) cos turns into -sinx i think do u follow the log rules? everything drops in front of the e 8xcosxe 8(-sinx)(e) ??1 solutions Answer 374232 by Alan3354(30937)   on 2012-03-16 14:54:45 (Show Source): You can put this solution on YOUR website!y = e^8x cos(x) cos turns into -sinx i think do u follow the log rules? everything drops in front of the e 8xcosxe 8(-sinx)(e) ?? ---------------- y = e^8x cos(x) What is the exponent? 8x? Or 8x*cos(x) ? It appears you want to differentiate. Is that right?
 Rate-of-work-word-problems/587799: Is it appropriate for two artists to work together and accomplish one painting?1 solutions Answer 374231 by Alan3354(30937)   on 2012-03-16 14:53:14 (Show Source): You can put this solution on YOUR website!Is it appropriate for two artists to work together and accomplish one painting? --------- Define "appropriate"
 logarithm/587796: this is tough!! y=sqrt xe^x^2 (x^2+2)^5 its online class and the examples are much more simple than this 1 solutions Answer 374230 by Alan3354(30937)   on 2012-03-16 14:52:34 (Show Source): You can put this solution on YOUR website!y=sqrt xe^x^2 (x^2+2)^5 --------------- It's not clear what's under the radical. And, you didn't say what you want to do.
 logarithm/587797: y=(sinx)^2(tanx)^4/(x^2+3)^2 again i can't figure it out. any help would be great 1 solutions Answer 374229 by Alan3354(30937)   on 2012-03-16 14:51:01 (Show Source): You can put this solution on YOUR website!y=(sinx)^2(tanx)^4/(x^2+3)^2 again i can't figure it out. any help would be great ------------------ What do you want to do? ----------------- y=(sinx)^2(tanx)^4*(x^2+3)^-2 Use the product rule: y' = ----------------- Sometimes you can combine and simplify = = =
 Equations/587583: Could someone please help me with this problem? 3x - 2(x-4)= 5x + 81 solutions Answer 374209 by Alan3354(30937)   on 2012-03-16 10:46:50 (Show Source): You can put this solution on YOUR website!Could someone please help me with this problem? 3x - 2(x-4)= 5x + 8 ----------- 3x - 2x + 8 = 5x + 8 x = 5x 0 = 4x x = 0
 Circles/587697: If the circumference of a circle is dtt, then the circumference of a semi-circle is a. 2dtt b. dtt/2 c. .5(dtt) d. b and c 1 solutions Answer 374208 by Alan3354(30937)   on 2012-03-16 10:43:54 (Show Source): You can put this solution on YOUR website!If the circumference of a circle is dtt, then the circumference of a semi-circle is a. 2dtt b. dtt/2 c. .5(dtt) d. b and c -------- 1/2 of dtt = dtt/2 That's the same as 0.5dtt
 test/587707: Find f(6) when f(x) =9x-31 solutions Answer 374207 by Alan3354(30937)   on 2012-03-16 10:42:38 (Show Source): You can put this solution on YOUR website!Find f(6) when f(x) =9x-3 -------- Sub 6 for x
 Percentage-and-ratio-word-problems/587673: How do you find the ratio if the word problem includes a fraction? For ex. Judy has 3/4 red apples. The rest are green. In total there are 90 How many green apples are there1 solutions Answer 374206 by Alan3354(30937)   on 2012-03-16 10:41:50 (Show Source): You can put this solution on YOUR website!How do you find the ratio if the word problem includes a fraction? For ex. Judy has 3/4 red apples. The rest are green. In total there are 90 How many green apples are there ------------------- If 3/4 are red, then 1/4 are green. The ratio is 3:1. ------------- Your example is not a good one, tho. 3+1 = 4 90/4 = 22.5 3*22.5 = 67.5 red apples 1*22.5 = 22.5 green apples ------------ She could have 1/2 an apple of each color, I suppose.
 Linear-equations/587706: Write the equation of the line with a slope of -5 and a y-intercept of (0,3). Write the equation of the line with a slope of -1/3 and passing through the point (6, -4). Write the equation of the line passing through the points (0, -4) and (-2, 2). Write the equation of the line passing through the points (-6,1) and (-4,2). Write the equation of the line with an undefined slope, passing through the point (2, 5). Hint: refer back to lesson 4.04 for help with this one. 1 solutions Answer 374205 by Alan3354(30937)   on 2012-03-16 10:36:54 (Show Source): You can put this solution on YOUR website!Write the equation of the line with a slope of -5 and a y-intercept of (0,3). ----------------- y = mx + b y = -5x + 3 Nothing to figure out. ------------------------- Write the equation of the line with a slope of -1/3 and passing through the point (6,-4). ---------- Use y = mx + b and the point to find b -4 = (-1/3)*6 + b Find b, then it's the same as the 1st problem. ----------------- Write the equation of the line passing through the points (0,-4) and (-2,2) ------------- Find the slope, m = diffy/diffx Then use y = mx + b and either point to find b. Then it's the 1st problem again. ---------------- Write the equation of the line passing through the points (-6,1) and (-4,2) --------- Same as the preceding problem. ------------ Write the equation of the line with an undefined slope, passing through the point (2,5). Hint: refer back to lesson 4.04 for help with this one. --------- Undefined is parallel to the y-axis, so the x value is constant. x = 2 is the equation. -------------
 Volume/587647: find the total surface area of a hemisphereof radius 7 cm (take pi to be 3.142)1 solutions Answer 374204 by Alan3354(30937)   on 2012-03-16 10:32:10 (Show Source): You can put this solution on YOUR website! find the total surface area of a hemisphereof radius 7 cm (take pi to be 3.142) ----------- SA of a sphere = 1/2 of that =
 Circles/587702: Please help me solve this graph problem: Four points on a graph are (2,3); (-2,3); (-2,-3); (2,-3). If you join the points the shape will be. a. a trapezoid b. a square c. a rectangle d. a triangle1 solutions Answer 374203 by Alan3354(30937)   on 2012-03-16 10:29:17 (Show Source): You can put this solution on YOUR website!Please help me solve this graph problem: Four points on a graph are (2,3); (-2,3); (-2,-3); (2,-3). If you join the points the shape will be. a. a trapezoid b. a square c. a rectangle d. a triangle -------------- Plot the points and see. There are only 4.