# math..solve for u again

155,622 results, page 62
1. ## math

how can I solve: 6³ + 6 ÷ 2¹ - 4² I got the answer wrong on the test and the teacher told me the answer was 203 but I want to know how to do it. I was to embarrassed to ask because all the other students knew how to do it
2. ## math

Solve, using linear combination. 5x + y = 2 4x + y = 4 Write your answer as an ordered pair or write "no solution" or "infinitely many solutions".
3. ## Math

Ok so you're supposed to solve the system by method of substitution. And the problem is: -2/3x + y = 2 2x - 3y = 6 So i put y= 2/3x into the second equation which looks like: 2x - 3(2/3x + 2) = 6 and then 2x-2x-6=6 So like everything cancels out? So then
4. ## Math

Hello I am having trouble with a pre-calculus problem. The problem is ln|Sin2X-CosX-1|=0 if you could help by listing the steps to solve that would be great! Thanks!
5. ## math

Good evening. I do not know how to solve this kind of problem. Could someone help me. Find both x-intercept and the y-intercept of the line given by the equation for 2.4x+2.9y+6.4=0 Thank you for your kindness.
6. ## Math

How would you solve these questions using Trigonomic Identities? sin^2x = tan^2x/1+tan^2x sinx+cosx/tanx = 1/cosxtanx
7. ## math

If evelyn practices the piano for 45 mins every day, how many minutes does she practice the piano in one year? Please solve. Thx
8. ## Math

ln [1.70E-2] = ln(0.144) - (k s-1)(3609 s) Solve for k. I have a TI30 calculator. Am I suppose to press just the ln button or do I have to press 2nd and then ln??
9. ## math

the sum of three consecutive numbers is eighteen. Write an expression describing the equation and solve the state of the three numbers
10. ## math, solving Oblique triangle

steve, hoe do you solve this cause i don't know how and i don't get it : b/sin49° = c/sin115° = 10/sin16°
11. ## Math

A cube has a surface area of 126 square feet. What is the area of one faces? -How do you solve this type of problems?
12. ## Math

Can you help with this equation? Have to solve for the indicated variable: For x: With equation y = x + 1/x - 1; in case it doesn't make sense; the x + 1 is in the numerator and the x - 1 is in the denominator. Thank you for your help. Cassandra
13. ## math

How can I solve this problem. A restaurant has 7 booths and 20 table. Write tth ratio of booths to tables as a fraction.
14. ## math

how many times does the graph of y= 2x squared -2x+3 intersect the x-axis? It intersects the x-axis when y = 0. So: y = 2x^2 - 2x + 3 0 = 2x^2 - 2x + 3 Its not factorable so you'll have to use the quadratic equation to solve for x.
15. ## math

the sum of three consecutive numbers is eighteen. Write an expression describing the equation and solve the state of the three numbers
16. ## math

I'm trying to solve by completing the square but i always get stuck at the end.. 3x^2-6x+2=0 3(x^2-2x)+2=0 3(x^2-2x+1-1)+2=0 3(x-1)^2 -1 =0 3(x-1)^2=1 now what do i do?... the answer is supposed to be x=3+-(square root)of3-> the whole thing over 3
17. ## Math

What do you get when you solve this equation where t = time in hours log t = (0.576 log (72/526) -0.176 Would it matter if t were in minutes? Thank you
18. ## math

how do i solve, marge has six coins that total \$1.15. she cannot make change for \$1.00, 1/2 dollar, a quarter, a dime, or a nickel.what coins does she have?
19. ## math

Solve the equation. (Enter solutions from smallest to largest. If there is no solution, enter NONE in the answer boxes.) 5x2 = 9x + 2
20. ## MATH

Find the formulas for the functions f(g(x)) and g(f(x))when f(x) = 2/x and g(x) = 2x^2-1 f(g(x)) = ? g(f(x)) = ? for f(g(x)) would it be 2/x(2x^2-1) or g(f(x)) 2x^2(2/x)-1? Would i solve like this? also when I tried to input the answer after solving didn't
21. ## math

I would appreciate any help thanks select two intergers between -12 and +12 write two equations that have the two intergers as solutions. solve the equation using addition/subtraction method
22. ## Math

I'm unsure how to solve this... can someone help me? Match the equation with its graph. −6/7 x - 1/2 y = 3/7 The answers are graphs, so I'll type the coordinates of the graphs here. A.) -1, 4; -6, 4 B.) -1, -4; 4, 6 C.)-4, -6; 4, 8 D.) -4, 6; 2, -4
23. ## math

Robert has 26 coins that are all nickels and dimes. The value of the coins is \$1.85. Write and solve a system of equations thatrepresents this situation.
24. ## math

Solve for x and y using elimination ax+by=c bx+ay=c This question has been confusing me for a long time, and I can't seem to find the answer by solving using elimination. Thanks for helping me :)
25. ## math

Solve the linear programming problem by the method of corners. Find the minimum and maximum of P = 3x + 2y subject to 3x + 5y ≥ 20 3x + y ≤ 16 −2x + y ≤ 2 x ≥ 0, y ≥ 0 The minimum is P = at (x, y) =

Solve the system of equations to find x,y,z (hint let d=x2 e=y2 and d=z2 . Find d e and f first) !!where ever you see 2 it's supposed to be a squared sign!! X2+y2+z2=9 3x2-y2-z2=7 Y2+2z2 =6
27. ## math

a bus charges 1.00 for each piece of luggage. if you ridethe bus at 8.50 and you have 3 suitcases, what is the total cost? solve using computations
28. ## Math

Solve csc^2 x = 5 algebraically over the interval 0 <= x <= 2pi. Round to the nearest hundredth. My answer: csc x = sqrt 5 = 2.24
29. ## Math

Please help me solve this!! I'm really struggling with this topic Write an equation in slope intercept form with a y-intercept of 1 and is parallel to the given line
30. ## math, beginning algebra

can someone correct this for me. Directions: Solve each literal equation for the indicated variable. 2x + 3y = 6 (for x) Linear Equation My answer: X = 3-1.5y yes.
31. ## math 117

Solve the system of equations by graphing Then classify the system as consistent or inconsistent and dependent or independent
32. ## to annonymus can you help me with math

How do i solve inequalitites with three variables. I still can't figure it outplease help. x+y=1 y-z=-3 2x+3y+z=1 the answers are 3,-2,1 how do get there by solving linear equations with three variables. 5x-2y-z=2 -y+2z=11 x+y+z=-3
33. ## Math

5. Solve the proportion using cross product 18/20 = k/110 A. 99 (my answer) B. 122 C. 33 D. 2.9 (my answer) The reason why I picked 2 of them were because I'm stuck between the two
34. ## math

Write a real-world problem that you could represent with the equation 4x+5=37. Solve the equation to find the answer to your question.
35. ## Math

Our difference is 6. We have a sum of 14. What numbers are we? We know number 10. How did you find 4? Please describe and solve the riddle.Write the number sentence.
36. ## Math

x = 2 , 4 , 6 , 8 y = 18, 34, 50, 66 This is supposed to be a table where the x lines up with the y in order How would I find the equation to solve this when x = 20? x goes up by +2 y goes up by +16 but starts with 18 I already posted this and got the
37. ## Math

If you solve this you are officially amazing! "The diagonals of a trapezoid are perpendicular and have lengths 8 and 10. Find the length of the median of the trapezoid."
38. ## math

if a person uses 40 to 45gallons of gas and pays \$2.96 to \$3.61 a gallon, how much money will pay for gas every week. I have no idea how to solve it,so if someone if is willing to help me i appreciate the help.Thank you
39. ## Math

Write and solve an equation for each of the following. Triangle ABC is congruent to triangle DEF. AB = 2x - 10, and DE = x + 20. Find the value of x and AB. I don't even know where to begin, please help.
40. ## math

Solve using the addition and multiplication principles. 6minus−6x less than or equals¡Ü 4minus−5x what is the solution set
41. ## math

Solve the linear programming problem by the method of corners. Find the minimum and maximum of P = 3x + 2y subject to 3x + 5y ≥ 20 3x + y ≤ 16 −2x + y ≤ 2 x ≥ 0, y ≥ 0 The minimum is P = at (x, y) =
42. ## math

Solve this plz The area of a rectangle is 1680msq.if it's diagonal is 58 m long find the length & width of the rectangle
43. ## Math

solve by the elimination method. what is the solution of the system? type a pair, an integer or a fraction, N if no solution, and I for many solutions. Q: x + 8y = 17 -x + 2y = 3 A: N?
44. ## Math

Please help! They are asking for 2 solution sets and I don't know where to start. Thanks in advance! Solve and write interval notation for the solution set. 3 – 8x < –5 or 3 – 8x > 19
45. ## math

how do you solve: integral:(x-1)sqrt(x) dx There aren't any limits of integration Add the integrals of x^3/2 dx and -x(1/2) dx. Use the rule that the integral of x^n is x^(n+1)/(n+1), where n is any constant.
46. ## Math

David wanted to solve 3(x-7)=5. As a first step, he wrote 3x-21=15. What error did he make? Correct his error and then find the solution?
47. ## Math - Functions

For the real valued functions f(x) - |x| - 4 and g(x) = sqrt(5 - x) Find the composition of f o g and the domain in interval notation. Can someone help me solve this?
48. ## Math helppp

The area of a playground is 64 square yards. The length of the playground is 4 times longer than its width. How can I solve this?
49. ## math

four friends want to equally share 2 2/3 feet of rope.What amount of rope should each friend get?Draw a picture to solve
50. ## math

Is (5,2) a solution of 4x-2y=-6 I said no, am I right? I am working on another problem where they want to know if this system of equations is perpendicular or parallel or neither,5x+4y=2, 4x-5y=4 I said neither. Is this right? I am to solve by using
51. ## Math - Exponentials

How do I approach the following problem. Please don't give answer but just guidance as to how to approach these in general. I need to be able to solve without a calculator. 3^(2x+1)-16(3^x)+5=0
52. ## math

hi i need to solve this question but i don't know how to do it when there is dividing included x(x-8):5=92 i did this much and then i found out that what i was doing was wrong x(x-8):5*5=92*5 2x-8=460 2x=468 x=234 but it seems wrong
53. ## Math

Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. 7^4x = 4.9
54. ## Math

Please lead me in the right direction. I am so confused and I have been working on this one problem for an hour. I have the answer, but I want to know how to get to it. The answer is (1,1,0) Solve the system by elimination. -2x+2y+3z=0; -2x-y+z=-3;
55. ## algebra2

solve the equation: First: x + 3y = 5 Second: 3x - y = 5 should i use substitution or add them? "First" + 3 times "Second" eliminates y: x + 3y + 3*(3x - y) = 5 + 3*5 ---> 10 x = 20 ----> x = 2 Inserting in "First" gives: 2 + 3 y = 5 ---> 3 y = 3
56. ## Chemistry

Can someone link me videos and sites that can teach me the formula to solve these? Or try to help me understand how to solve these? 1.You have 200g of a radioisotope . If the half-life of this radioisotope is 20 days, how many grams will remain after 40
57. ## calculus

Please help me solve. I think increase = concave up and decrease = concave down? On the graph y = x^5-15x^3+10 for x what intervals is the function increasing, decreasing, concave up and concave down. Plot the critical points, plot and label the inflection
58. ## algebra

The volume V of a gas varies inversely as the pressure P on it. If the volume is 250 cm3 under a pressure of 35 kg/cm3, solve for the pressure applied to have a volume of 180 cm3. Be sure to define your variables, find your constant variable, construct
59. ## Calc I (@Reiny)

y = x^3 - 8x^2 + 6x -2 has a slope of 6 at two points, what are the coordinates? I used Reiny's way to help solve this answer. Please check if I've done it correct: y'= 3x^2-16x+6 3x^2-16x+6=6 3x^2-16x=0 x(3x-16)=0 Solve for x's x=0 3x-16=0 ~> x=16/3
60. ## Calc I (@Reiny)

y = x^3 - 8x^2 + 6x -2 has a slope of 6 at two points, what are the coordinates? I used Reiny's way to help solve this answer. Please check if I've done it correct: y'= 3x^2-16x+6 3x^2-16x+6=6 3x^2-16x=0 x(3x-16)=0 Solve for x's x=0 3x-16=0 ~> x=16/3
61. ## algebra

April buys 8 books for \$44.1 paper back book costs\$4 and 1 hard back book costs \$8. how many of each did she buy? (use an equation to solve) p ---> paperback books h ---> hardcover books use these equations to solve p + h = 8 4p + 8h = 44
62. ## Jay

Please help me to solve this problem. Thank you in advance for helping to solve this problem. Have a great day. Here is the question? Use the point-slope form to write the given slope and point. Leave the equation in that form: slope 7/8, passes through
63. ## pre-calc

Solve: cos(2x-180) - sin(x-90)=0 my work: cos2xcos180 + sin2xsin180= sinxcos90 - sin90cosx -cos2x - sin2x= cosx -cos^2x + sin^2x -2sinxcosx=cosx I'm stuck here. I tried subtracting cosx from both sides and making sin^2x into 1- cos^2x, but I still can't
64. ## basic geometric

The width of a rectangle is 6 centimeters less than the lenght. The perimeter is 64 centimeteres . would you please help me, answer these work. than you. L = length W = width ================ eqn 1: 2L + 2W = perimeter = 64 cm eqn 2: W+6cm = L Solve the
65. ## AP Physics

Hello given that I person 65 kg takes 4.5 s to climb a flight of stairs that is 5.5 m my question is well I was asked to solve for the work and W=fd and in this case f is equal to the normal force correct? Just take the opposite of mg??????? Also I'm asked
66. ## Algebra I

A local gym charges nonmembers \$8 per day to use the voleyball courts. Members pay a yearly fee of \$150 and \$2 per day to use the voleyball courts. Write and solve an equation to find how many days you must use the voleyball court to justify becoming a
67. ## chemistry

solve Ka for HX => H^+ + X^- given 0.1M LiX at pH=8.9 Chemistry - DrBob222, Tuesday, March 30, 2010 at 6:32pm LiX(aq) ==> Li^+(aq) + X^-(aq) X^- is a base and hydrolyzes in water to X^- + HOH ==> HX + OH^- Make an ICE chart and substitute into the
68. ## Chemistry

Hi, can you help with how to solve this equation? 50.0 gram sample of NaCl is added to water to create a 0.50 L solution. What volume of this solution is needed to create a 1.30 L solution that is 0.100 M NaCl? The choices provided: a) 152 mL b) 255 mL c)
69. ## Rational Expression

(x+1/2x-1 - x-1/2x+1) * (2x-1/x - 2x-1/x^2) (x+1/2x-1 - x-1/2x+1)*(2x-1/x - 2x-1/x^2) The first parenthesis reduces to zero. Check that. I have the answers in the back of my book (just not how to get there) the book shows the answer as 6(x-1)/x(2x+1). When
70. ## Geometry / Algebra 1

(a) The surface area of the prism shown is 314 square meters. Write an equation that u can solve to find the value of w. side a=wm b=8m and c=(w+4)m (on the picture) I'm guessing u use the formula surface area=2ab+2bc+2ac??? Well if so I need all that
71. ## calculus

I have to help teach this class tomorrow for my Senior Seminar Math class. The lesson is over Exponential and Logarithmic Functions and L'Hospital's Rule. I have all the problems needed to review this lesson, but i can not solve any of them. My teaching
72. ## math

What are the equation on these 1. Determine the amplitude of y = -16 cos (x) 2. Determine the amplitude of = -sin (x) 3. Determine the domain of = -5 cos (x) 4. Determine the range of y = -10 sin (x) 5. Determine the period of y = -5 cos (2ðx) 6.
73. ## Geometry

What is the surface area of a conical grain storage tank that has a high of 62 meters and a diameter of 24 meters? Round the answer to the nearest square meter. A)2,381m^2 B)2,790m^2 C)2,833m^2*** D)6,571m^2 My answer is C but I think I'm wrong. I lucked
74. ## Math - Calculus

For the following arithmetic sequence: determine the common difference. Find the next three terms of the sequence. e) 2/3 , 1/15, -8/15 I really don't get how to solve this one, I see no pattern :\
75. ## math

to solve an equation, it is sometimes helpful to ____________, the original operation. a. redo b. undo c. imitate d. expand I believe the answer is undo B
76. ## math problem

please help me solve if I open a book to two facing pages, the product of the page number is 342 what will the two page numbers be
77. ## math

Two factors that make a product are sometimes called a factor pair . Describe how using factors pairs helped you solve the problems.
78. ## Math

How do I solve lim((3x^3 - 5x +2)/(4x^2 + 3)) as x approaches infinity? I divided everything by the largest power of x, but I ended up getting a denominator of 0. Do I have to factor this? (answer is infinity)
79. ## math

Solve this service problem. Number of dinners = 115 Individual portion = 6 oz. Size of can = 32 oz. Number of cans required
80. ## Math

List all possible rational roots, use synthetic division to find an actual root, then use this root to solve the equation. x^3 -7x^2 +13x -7=0
81. ## math

Rationalize the denminator in the expression: 1/(1+(sqrt of 3)-(sqrt of 5)) and thenn... A=2PIr^2 + 2PIrh *solve for positive r **PI is equal to 3.14etc.
82. ## math

Write an addition problem in which, when the addends are rounded to the nearest ten, the sum is 90. Then explain how you use estimation to solve the problem.
83. ## Math

Two factors that make a product are sometimes called a factor pair . Describe how using factors pairs helped you solve the problems.
84. ## the subject with numbers

Julie is paid a comission of 3% on all sales. Last week, she earned \$82.74. What were her total sales? How do you solve this math question? Please and Thank you!
85. ## Math

7 students enter a school talent show. Prizes are awarded for the top 3 places. How many different top=three outcomes are possible? How would I solve this?
86. ## Math

A marathon runner runs 10 1/2 miles in 2 hours. What is her rate? Write an expression to represent the problem. Solve the problem:

88. ## Math

Is there any one who knows if I am right? Do not solve, show possibilities of Descartes's rule of signs for roots. 4x^3-9x^2+6x+4=0 f(x)=4x^3-9x^2+6x=4 - + + one change =4(-x)^3-9(-x)^2+6(-x)+4 - + - + three changes Positive Negative Imaginary 2 1 0 1 2 0
89. ## math

Solve this system 10x+2y=7,y=-5x+3 by addition or substitution. If a unique solution does not exist state if the system is dependent or inconsistent.
90. ## Math

The corners of a square lie on a circle of Diameter D = 0.35m. Each side of the square has a length L. Find L. - I'm not quite sure how to solve this problem
91. ## MATH

Okay now. New question. Find the number of (m) ways in which 6 people can ride a toboggan if ONE OUT OF THREE people must drive. M=? PLEASE DO NOT SOLVE! Just tell me how to do the problem. You MIGHT use factorial.
92. ## math

what is the probability of winning a lottery game where the winning number is made of 6digits from 0-9 chosen at random? i do not undestand how to solve please help
93. ## Math

Which set of output values correctly competes the function table. (y=2x-4) Input (x) 6 ? 2 ? -4 ? 1. 8,2,12. 2.8,0,12. 3.8,0,-12. 4.-8,0 12. Please give me step by step of how to solve this.
94. ## Math Logarithmic Question

Solve for all possible values of x within the domain of the following logarithmic expressions. a)logx+log2=log7−log3
95. ## math

Solve the problem.A collection of dimes is arranged in a triangular array with 14 coins in the base row, 13 in the next, 12 in the next, and so forth. Find the value of the collection.
96. ## Math; Pre- Algebra

I neede help with how to solve equations with variabls on both sides. Can you give me some examples and work them out step by step?? Please!! :D
97. ## Math

Plz help me to solve this Find the time in which an amount of rs.6250 amount to rs.6760 at 4% per annum,if the intrest is compounded anually.
98. ## math

The hypotenuse of a right triangle measures 10m. One leg of the triangle is 2m longer then the other. Find the lengths of the legs. How would you solve this equation?
99. ## Math

Okay now. New question. Find the number of (m) ways in which 6 people can ride a toboggan if ONE OUT OF THREE people must drive. M=? PLEASE DO NOT SOLVE! Just tell me how to do the problem. You MIGHT use factorial.
100. ## Math

You earn \$7.25 per hour babysitting. Write and solve an inequality to find how many full hours you must work to earn at least \$200