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Fombitz answered: 13805 problems
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Complex_Numbers/365403: Simplify (5+i)(-4-8i)and write the answer in standard form? 1 solutions Answer 260468 by Fombitz(13828)   on 2010-11-02 23:12:50 (Show Source): You can put this solution on YOUR website! Use the FOIL Method,

Angles/365399: Each pair of angles is supplementary. Find the measure of each angle: m(angle)f = 3x + 40 and m(angle) g = 2x + 10 1 solutions Answer 260466 by Fombitz(13828)   on 2010-11-02 23:10:56 (Show Source): You can put this solution on YOUR website! . . . . degrees degrees

Linear-systems/365371: how do you solve the system of equations with these three equations? x-y+z=8 x+y+z=6 x+y-z=-12 1 solutions Answer 260465 by Fombitz(13828)   on 2010-11-02 23:09:17 (Show Source): You can put this solution on YOUR website! 1. 2. 3. Add eq. 1 and eq. 3, . . . Add eq. 1 and eq. 2, . . . Then from eq. 2,

Systems-of-equations/365378: Write a system of two equations using x and y to represent the following problem. A chemist is mixing two solutions together. The chemist wants 100 gallons when complete. He is mixing a 24% solution with a 50% solution to get a 36% solution. How many gallons of each will he use? 1 solutions Answer 260462 by Fombitz(13828)   on 2010-11-02 23:01:05 (Show Source): You can put this solution on YOUR website! Let x be the amount of 24% solution, y the amount of 50% solution. 1. . . . 2. Multiply eq. 1 by -12 and add to eq. 2, gallons Then from eq. 1, gallons

Equations/365387: Hello, I'm working on some practice problems and checking my work with you. I thought I understood this material and just got a 4 out of 10 on my quiz! Ouch. Using the rational zero test, I must find all possible rational roots: First I identified the constant (-9) and the leading coefficient (3) and then I listed the factors of each: -9: 1, 3, 9 3: 1, 3 Then I divide all factors of the constant by the factors of the leading coefficient: , , , , , My final answer is , , , and Thanks in advance for your valuable time! :) 1 solutions Answer 260459 by Fombitz(13828)   on 2010-11-02 22:57:18 (Show Source): You can put this solution on YOUR website! That's 1/2 of the answer, you also need ,,, and .

Quadratic_Equations/365126: Find -a + b - c + d if (x - 1/5)(x + 1)(x + 3/7) = ax^3 + bx^2 + cx + d for all real values of x. 1 solutions Answer 260371 by Fombitz(13828)   on 2010-11-02 16:33:28 (Show Source): You can put this solution on YOUR website! . . . . . .

Linear-equations/365137: how do this equation:1.5,y-intercept:-1 1 solutions Answer 260370 by Fombitz(13828)   on 2010-11-02 16:28:32 (Show Source): You can put this solution on YOUR website! Is 1.5 the slope? If so, use the slope-intercept form, where is the slope, is the intercept. . . .

Rational-functions/365106: Solving Rational Equations x/x+3 + 1/x-3 = 1 1 solutions Answer 260368 by Fombitz(13828)   on 2010-11-02 16:25:20 (Show Source): You can put this solution on YOUR website! Use the common denominator, . . . . . . . . . . . . . .

Square-cubic-other-roots/365100: 3x sq=6 1 solutions Answer 260366 by Fombitz(13828)   on 2010-11-02 16:20:23 (Show Source): You can put this solution on YOUR website! Do you mean sqrt(3x)=6??? If that's not what you meant, please repost.

Probability-and-statistics/365127: A spinner has 4 equal sectors colored yellow, blue, green, and red. What are the chances of landing on blue after spinning the spinner? A. 1 B. 1/2 C. 1/3 D. 1/4 E. Depends on spinner’s speed 1 solutions Answer 260365 by Fombitz(13828)   on 2010-11-02 16:18:49 (Show Source): You can put this solution on YOUR website! There are four sections. The total probability is 1. For each of the four sections,

Trigonometry-basics/365129: Simplify the expression. a^4b^3c^-2/a^2b^-1c^0 1 solutions Answer 260364 by Fombitz(13828)   on 2010-11-02 16:17:53 (Show Source): You can put this solution on YOUR website! . . . .

Expressions-with-variables/365131: What is x^2-9 over 2x-6 multiplied by 5x-15 over x^2+6+9? 1 solutions Answer 260362 by Fombitz(13828)   on 2010-11-02 16:16:06 (Show Source): You can put this solution on YOUR website! . .

Angles/365133: i dont understand how to add and subtract angles 1 solutions Answer 260359 by Fombitz(13828)   on 2010-11-02 16:13:10 (Show Source): You can put this solution on YOUR website! Do you have an example that you can post??

Bodies-in-space/365123: find the ratio, reduced to lowest terms, of the volume of a sphere with a radius of 3 inches to the volume of a sphere with a radius of 8 inches 1 solutions Answer 260348 by Fombitz(13828)   on 2010-11-02 15:42:23 (Show Source): You can put this solution on YOUR website! . . .

Expressions-with-variables/365124: can you factor 4x^4+4x^3-35 and show your work please? 1 solutions Answer 260347 by Fombitz(13828)   on 2010-11-02 15:39:44 (Show Source): You can put this solution on YOUR website! . . . This equation can't be factored.

Radicals/365114: solve (x+3)(x-16)(x+2)>0 The solution set is {x ⎹ } 1 solutions Answer 260345 by Fombitz(13828)   on 2010-11-02 15:37:30 (Show Source): You can put this solution on YOUR website! Break up the number line into 4 regions using the critical points of the function. Region 1:(,) Region 2:(,) Region 3:(,) Region 4:(,) . . . For each region, choose a point in the region (not an endpoint). Test the inequality. If the inequality is satisfied, the region is part of the solution region. . . Region 1: False, Region 1 is not part of the solution region. . . Region 2: True, Region 2 is part of the solution region. . . Region 3: False, Region 3 is not part of the solution region. . . Region 4: True, Region 4 is part of the solution region. . . Solution Region:(,) U (,) . . . Graphical verification: Look for regions where the function is above the x-axis () . . .

Triangles/365115: A segment 12" long is divided into two segments having lengths in the ratio of 2:3. Find the length of each segment. (Hint: Let 2x and 3x represent the length of the parts.) 1 solutions Answer 260339 by Fombitz(13828)   on 2010-11-02 15:10:10 (Show Source): You can put this solution on YOUR website! inches inches

Rational-functions/365105: Solving Rational Equations 1/x=2/x-3 1 solutions Answer 260338 by Fombitz(13828)   on 2010-11-02 15:06:47 (Show Source): You can put this solution on YOUR website! . . .

Triangles/365113: a triangle has an area of 32ft squared and has a height of 4ft what is the length of its base?? 1 solutions Answer 260337 by Fombitz(13828)   on 2010-11-02 15:05:46 (Show Source): You can put this solution on YOUR website! Now solve for .

Exponents-negative-and-fractional/365108: equal value y=x+2 y=2x-1 1 solutions Answer 260335 by Fombitz(13828)   on 2010-11-02 15:04:51 (Show Source): You can put this solution on YOUR website! Since they both equal y, set them equal to each other. Then . . .

Complex_Numbers/364811: (-4-3i)-( square root of 7-2i) 1 solutions Answer 260334 by Fombitz(13828)   on 2010-11-02 15:03:05 (Show Source): You can put this solution on YOUR website!

Money_Word_Problems/365101: To earn $ 250.00 in one year from interest with 4%. How much money one must have? 1 solutions Answer 260333 by Fombitz(13828)   on 2010-11-02 15:00:01 (Show Source): You can put this solution on YOUR website!

Numeric_Fractions/365107: d-5 ____ = 9 8 1 solutions Answer 260332 by Fombitz(13828)   on 2010-11-02 14:58:13 (Show Source): You can put this solution on YOUR website! . . . Now solve for

test/365111: (1/4)/(3/8) 1 solutions Answer 260331 by Fombitz(13828)   on 2010-11-02 14:57:35 (Show Source): You can put this solution on YOUR website!

Sequences-and-series/365094: Hi! I need some help developing a rule for the following number sequence: 4, 10, 18, 28, 40, 54, 72... I know that the pattern is increasing by two each time, but I am struggling to find a rule for this pattern. Any help would be appreciated! Thanks!! 1 solutions Answer 260330 by Fombitz(13828)   on 2010-11-02 14:56:45 (Show Source): You can put this solution on YOUR website! Look for a pattern that looks like, . . . Use the points to solve for ,, and . . . 1. 2. 3. . . . Subtract eq. 1 from eq. 2, 4. Subtract eq. 1 from eq. 3, 5. Subtract eq. 4 from eq. 5, Then from eq. 4, Then from eq. 1, . . .

Graphs/364770: Given two points, find: Slope Point-Slope Form Slope-Intercept Form Standard Form (-2,6)&(-5,7) 1 solutions Answer 260326 by Fombitz(13828)   on 2010-11-02 14:34:42 (Show Source): You can put this solution on YOUR website! First find the slope. When you have the slope, use the point-slope form, with either point. . . . Convert to slope-intercept form, . . . Then convert to standard form, get rid of all denominators. Move x and y to the left hand side, constant on the right hand side. Coefficient for x should be positive.

Percentage-and-ratio-word-problems/365091: The width of a rectangle is 4 cm less than 1/5 of the length. If the perimeter of the rectangle is 88 cm, find its length and its width. Width of rectangle = 1/5x - 4 88 = 2(x) + 1/5 - 4 ?? I don't know what i'm doing wrong. 1 solutions Answer 260323 by Fombitz(13828)   on 2010-11-02 14:28:52 (Show Source): You can put this solution on YOUR website! . . . . . . Substitute, Now solve for , then go back and solve for .

Functions/365092: for the function f(x)=7-3x find the following 2f(x) 1 solutions Answer 260322 by Fombitz(13828)   on 2010-11-02 14:26:30 (Show Source): You can put this solution on YOUR website!

Probability-and-statistics/364982: Find the probability that none of the 3 bulbs in a signal-light will have to be replaced during the first 1200 hours of operation if the lifetime X of the bulb is a random variable with the density f(x)=6[0.25-(x-1.5)^2] when 1<=x<=2, and f(x)=0 otherwise, where x is measured in multiples of 1000 hours. Please show work if you know the aswer. =) 1 solutions Answer 260321 by Fombitz(13828)   on 2010-11-02 14:25:42 (Show Source): You can put this solution on YOUR website! Find . . . or approximately,

Functions/365088: for the function f(x)=7-3x find the following f(5) 1 solutions Answer 260318 by Fombitz(13828)   on 2010-11-02 14:10:20 (Show Source): You can put this solution on YOUR website! Finish the calculation for the final answer.

Coordinate-system/365089: 1. The points L(4, 0),M(10, 0), and N(7, 5) form #LMN.What is the sum of the slopes of the three sides of the triangle?0 1 solutions Answer 260317 by Fombitz(13828)   on 2010-11-02 14:09:24 (Show Source): You can put this solution on YOUR website! . . . . . . . Once you've calculated them, add them up.