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Algebra homework help.?
How many liters of pure acid should be mixed with 70 liters of 20% acid to make a 30% saturated mixture ?
Possible answers are: A) 10 B.) 20 C.) 30. D.) 40 or E.) None of them.
It takes you 50 minutes to paddle 4500 meters upstream, and 12.5 minutes to go downstream. If you're going at a constant speed, how long would it take you to travel 5624 meters with no current?
Possible Answers: A) 12.5 minutes. B)25 minutes C) 31.25 minutes. D) 50 minutes or E)62.5 minutes
It takes you 3 hours to travel 18 km. downstream and 4 and a half hours to travel 18 km. upstream. What is the current?
A) 1/2 B. 1 C.) 1 1/2 D.) 2 or E) NOTA
Simplify: square root of .6
A.) square root of 15 over 5. B.) Square root of 3 C.) square root of 15. D.) 3 square root of 5 over 5. E.) Square root of 3 over 15.
Find the x-intercepts of f(x)=(x^2-x-2)(x-3)
Abs membership is 150 plus 12 dollars per month. Silver charges 100 dollars plus 15 per month. When is the shortest about of time abs membership be less than silver?
A.) 14 B.) 15 C.)16 D.)17 E.)18.
They;re not the exact questions, but they're close. I've been trying to get them done. If possible, a little explanationof how you got the answer would be great. Thanks !
3 Answers
- Anonymous1 decade agoFavorite Answer
1) ? (If you figure this one out you should let me know how you did it. It seems simple enough too, but I don't know how to.) However, the calculations that I have done are close to the numbers as I got 21, but don't quite match, so perhaps the answer could possibly be E). None of them. I would ask your teacher though, I am no math whiz. lol
2) (It is easier to understand if you write this out on a sheet of paper. But all you are doing is cross multiplying).
4500/50 = 5624/x
x = 50(5624)/4500
= 62.5 minutes.
x is how long it would take to travel 5624 meters if it takes 50 minutes to go 4500 meters. Also, you just ignore the downstream part, it has to significance to the question really.
3) This is only a guess. But I divided 18 by 3 to get 6 and 18 by 4.5 to get 4, then subtracted the two to get 2. Therefore my guess is that the answer is D). 2.
4) I don't get what this question is asking, sorry.
5) (x-3) gives you your first x-intercept, which is 3. (Remember the signs are opposite for when you graph it). Now, for (x^2-x-2) you are finding what adds to negative 1 and also multiplies to negative 2, which is -2 and 1. So you're equation or answer rather, will look like this:
f(x) =(x+1)(x-2)(x-3)
And then you would write:
x= -1, 2, 3
6) Sorry, but I don't understand this question either.
- ?Lv 45 years ago
-4c - 3c = 22 - 36 -7c = -14 c = 2 4g/14 - g/14 = 3/14 + 3/7 3g/14 = 3/14 + 6/14 = 9/14 3g = 9 g = 3 3r/4 = 5/6 - 2/3 3r/4 = 5/6 - 4/6 3r/4 = a million/6 9r/12 = 2/12 9r = 2 r = 2/9 6x = 25 + 86 = 111 x = 111/6 x = $18.50