# Questions & Answers for: SoftMath 18 270

Question about Algebrator - Algebra Homework Solver (689076614429)

## Report a bug

report a bug 15^2-21x-18 cannot factor, say it has a bug. I get this a lot. What is the problem the exact equation is 15x^2 - 21x - 18 =3(5x^2 - 7x - 6) =3{5x^2 -(10-3)x -6 } =3{5x^2 - 10x + 3x -6} =3

Question about Algebrator - Algebra Homework Solver (689076614429)

## How much pure gold should be melted with 15 grams

...of 14 karat gold, to be equal to (x+15) grams of 18 karat gold: (x*24 + 15*14) = 18 * (x+15) 24x + 210 = 18x + 270, or (24-18)x = 270-210. 6x = 60, so your unknown quantity is 10 grams of pure

Question about Algebrator - Algebra Homework Solver (689076614429)

## X+4+2/3=6

x+4+2/3=6 I THINK YOU WANT TO KNOW THE VALUE OF X X+4+2/3 = 6 (3X +12+2)/3 = 6 3X+14 = 3*6 3X + 14 =18 3X = 18 - 14 3X = 4 X = 4/3 X = 1.333 this is answer

Question about Algebrator - Algebra Homework Solver (689076614429)

## Sin x cos x = -1/2 solve for x

sin x cos x = -1/2 solve for x sin x cos x = -1/2 solve for x sin x cos x = -1/2 => 2sinx cosx = -1 => sin(2x) = -1 => 2x = (3pi)/2 OR 2x = 270° => x = 3pi/4 OR x = 135°

Question about Algebrator - Algebra Homework Solver (689076614429)

## 3x-7=5x+11

3x-7=5x+11 3x-7=5x+11 -2x=18 x=-9

Question about Algebrator - Algebra Homework Solver (689076614429)

## If 5 out of 18 college students work, how many would work if there were 1120 students?

If 5 out of 18 college students work, how many would work if there were 1120 students? About 311.

Question about Algebrator - Algebra Homework Solver (689076614429)

## If 5 out of 18 students work in college, how many would work if there were 1120 students?

if 5 out of 18 students work in college, how many would work if there were 1120 students? Probably the same 5 students while the rest were studying and going to parties. :) Set up the solution by ...

Question about Algebrator - Algebra Homework Solver (689076614429)

## Sinx=-1

sinx=-1 Find all solutions to the problem. This is precalculus-trigonometry. Consider this graph, of sin(x) http://www.analyzemath.com/trigonometry/graph_sine.gif You can see that where sin(x) = -1, x

Question about Algebrator - Algebra Homework Solver (689076614429)

## A library expansion, begun in 2002, was expected to cost \$109 million. By 2006, library officials estimate the cost would be \$42 million over budget.

...percent did the actual cost exceed the initial estimate? If you wanted to buy a shirt that was \$18.00 with 30%off you would do 18 * 30% = 5.4 off the price. Knowing that how do you find the % of ...

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