# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 230217: find the values of (theta) for which the equation tan(theta)=1 is true.express your answer in radians Click here to see answer by chibisan(131)

 Question 229750: approximate the greatest real root of f(x) = x^3 - 2x -5 to the nearest tenth Click here to see answer by Alan3354(30993)

 Question 230356: In 1990, the life expectancy of males in a certain country was 66.3 years. In 1997, it was 70.0 years. Let E represent the life expectancy in years t and let t represent the number of years since 1990. E(t)= ___t +____ round to the nearest tenth. Use the fuction to predict life expectancy of males in 2009. E (19) =______ round to the nearest tenth. I'm sorry I tried and I can not get this problem Click here to see answer by ankor@dixie-net.com(15660)

 Question 230823: which number is not a solution to the equation (2x-3)(x-11)(x/3+7)=0? A.-21 B.11 C.-3/-2 D.3/2 Click here to see answer by Alan3354(30993)
 Question 230823: which number is not a solution to the equation (2x-3)(x-11)(x/3+7)=0? A.-21 B.11 C.-3/-2 D.3/2 Click here to see answer by Theo(3464)

 Question 230828: please show me how to work out the problem 144=-12(x+5) Click here to see answer by Alan3354(30993)
 Question 230828: please show me how to work out the problem 144=-12(x+5) Click here to see answer by Theo(3464)

 Question 230834: Find the value of p and the value of q x^-6x+15 = (x-p)^+q Click here to see answer by stanbon(57387)

 Question 230835: how do I solve 10x+11=-19 Click here to see answer by unlockmath(1603)

 Question 230956: 1 calorie = 4.184 joules, and 1 calorie is the amount of heat needed to raise 1gram of water 1 degree celsius. I have 45 degrees celsius. I need help converting this to calories and kilocalories. Click here to see answer by Alan3354(30993)

 Question 230947: (7.6 #2) Can someone help me with this? By what should both sides of the equation below be multiplied to clear it of fractions? a) x/7 = 2x/3 + 9/4x b) 6x/x-6 = 5+ 1/x-6 Thank you, Alberto Click here to see answer by checkley77(12569)

 Question 231036: I need help with the following problem. I don't have a clue on how to figure it out. Find a value for K so that the following system of equations has infinitely many solutions. 6x + 3y = 15 Kx + y = 5 Thank you, Denise Click here to see answer by edjones(7569)

 Question 231095: please help me with this. i would appreciate it very much. 1-2/x=14/3x-1/3 thank you! Click here to see answer by Alan3354(30993)

 Question 231090: what is an everyday formula that we use in real life. please give formula and explanation. Click here to see answer by unlockmath(1603)

 Question 231155: Some doctors use the formula ND=1.08T to relate the variables N(the number of patient appoinments thr doctor schedules in one day, D(the duration of each patient appointment), and T( the total number of minutes the doctor can use to see patients in one day). A: Solve the formula for N B: Use the result to find the number of patient appointments N a doctor should make if she has 6 hours available for patients and each appointment is 15 minutes long. (round answer to the nearest whole number). Click here to see answer by user_dude2008(1861)

 Question 231194: This is a rational equation. 4 over X plus seven equals 2 over three X Click here to see answer by unlockmath(1603)

 Question 231195: This is a rational equation. 4 over X plus 7 equals 2 over 3X Click here to see answer by jsmallt9(3296)

 Question 231162: a leather coin purse has the shape of a triangle. Two sides are equal in length and the third side is 3 centimeters shorter than one and one-half times the length of the equal sides. the perimeter is 28.5 centimeters. Find the lengths of the sides. Click here to see answer by checkley77(12569)

 Question 231201: how to solve this system of equation graphically, x+y=-4 x-y=6 Click here to see answer by checkley77(12569)

 Question 230804: find the y-intercept of a parabola whose vertex is (-1,2), which is turned downward, and whose width is the same as y=2x^2. Click here to see answer by ankor@dixie-net.com(15660)

 Question 231329: Please solve this problem. Find the measure of the exterior angle. The equation on the exterior of the triangle is 3x-22. One side inside the triangle reads 80 degrees and the other one reads x. Please show work so i can do this on my own correctly. Click here to see answer by stanbon(57387)

 Question 231340: Please solve this equation. 4x+8=2x+3+51 Please show all work. Click here to see answer by rfer(12670)
 Question 231340: Please solve this equation. 4x+8=2x+3+51 Please show all work. Click here to see answer by bamaboy(14)

 Question 231273: Perform the operations indicated: 1. (7x- 2) + (6x+ 4) 2. (3x - 3.5) - (x + 1.8) 3. [7x^2 - 2/3)x]- [(4/9)X - 5] 4. (-5x^2 + 12x - 4) - (-2x^2 + 6) 5. -3x(-4x^2 + 7x - 9) 6. (8 - 3x)(2 + 4x) 7. (2x + 8)^2 8. (2x + 5)(x^2 + 3x + 2) 9. 6x^2+8x-7/ -x 10.3x^2+22x-8 / x+2 Click here to see answer by rfer(12670)

 Question 231361: Please solve this equation. 6x-7=1-3-x+2x thank you Click here to see answer by bamaboy(14)

 Question 231364: Please solve this equation. 6x-7=(103-x)+2x thank you Click here to see answer by bamaboy(14)

 Question 231371: Please help me solve this equation. the variable expressions represent the angle measures of a triangle. the measure of Angle A = x The measure of angle B = 2x The measure of angle c = 3x Find the measure of each angle and classify the triangle by its angles. Click here to see answer by rfer(12670)
 Question 231371: Please help me solve this equation. the variable expressions represent the angle measures of a triangle. the measure of Angle A = x The measure of angle B = 2x The measure of angle c = 3x Find the measure of each angle and classify the triangle by its angles. Click here to see answer by stanbon(57387)

 Question 231374: Please help me solve this equation. the variable expressions represent the angle measures of a triangle. measure of angle a = 3x-17 measure of angle b = x+40 measure of angle c = 2x-5. Classify what kind of triangle. I got 27, 67, and 129. What did you get? Click here to see answer by rfer(12670)

 Question 231440: 4(2r+8)=88 Click here to see answer by rapaljer(4667)

 Question 231066: please help me slove this question .this is from california geometry book. : Solve each equation. and how did you slove it ? 1.) 6x - 42 = 4x 2.) 8 - 3n = -2 + 2n 3.) 3(y + 2) = -12 + y 4.) 12 + 7x = x - 18 5) 3x + 4 = 1 dividing by2x -5 6) 2 - 2x = 2 dividing by 3x -2 7)Mark bought 3 CDs and spent \$24. Write and solve an equation for the average cost of each CD. ................... please help me out . thank you in advance . Click here to see answer by ankor@dixie-net.com(15660)

 Question 231084: the clarke family went sailing on a lake. their boat averaged 6 kilometers per hour. the rourke family took their outboard runabout for a trip on the lake for the same amount of time. their boat averaged 14 kilometers per hour. the rourke family traveled 20 kilometers farther than the clark family. how many hours did each family spend on their boat trip? Click here to see answer by ankor@dixie-net.com(15660)

 Question 106903: The sum of the ages of the three Romano brothers is 63.if their ages can be represented as consecutive integers,what is the age of the middle brother? Click here to see answer by monicapanyu(1)

 Question 231581: Write an equation: 1. The sum of half of a number and 8 less than the number is 25. n + (n-8) = 25 (?) 2. A triangle has two sides equal in length and a third side 5 in. longer than half the length of each of the other two sides. If the perimeter of the triangle is 50 in., how long is each side? 2x + (x + 5) = 50 (?) Click here to see answer by stanbon(57387)

 Question 231622: Write an expression with a variable for each situation described below. Then write a phrase telling what the variable represents. 1. Jason had 12 cookies and then ate some. 2. Loretta had 5 books and then bought some more. 3. Hal had 8 pens. He bought 5 more and then gave away some. Write an expression, then evaluate the expression. 4. Barbara saved d dollars a week from her job for 6 weeks. How much did Barbara save? Evaluate the expression for d = \$18.75. 5. Tom had \$40 before he went shopping. After he bought some school supplies, he had n left. How much did Tom spend on school supplies? Evaluate the expression for n = \$15. Click here to see answer by rfer(12670)

 Question 231666: Find the measure of the interior angles. This is a triangle. Show all work. measure of angle a = X+30 measure of angle b = 4x measure of angle c = x+60. Find the measure of A, B, and C Click here to see answer by stanbon(57387)

 Question 231690: the vector u(arrow above) has a magnitude of 4.3cm and a direction of 45 degrees.find the magnitude of its vertical component. Click here to see answer by stanbon(57387)

 Question 231686: find: int((x^3 + 1),dx) Click here to see answer by solver91311(16897)

 Question 231678: what is the difference between an algebraic expression and an algebraic equation Click here to see answer by jsmallt9(3296)

 Question 231728: What is the square root of 4 reduced? Click here to see answer by checkley77(12569)

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