|
Tutors Answer Your Questions about absolute-value (FREE)
Question 136927: I looked through all the promblems and can't find any like these two. I think I may be over thinnking these because one is absolute value but the other is just ( ). I am trying to review for a test so there aren't any answers and my friend came up with a different answer. Please help!
0-(-5)=5 I think it is 5 my friend says -5 but I thought in regular problems the negatives cancel each other out. Who is right?
The second question is absolute value and I know that is always positive so I think the answer should be 21 because I am adding but my friend says the minus sign stays a minus sign so the answer is 3. That makes sense but I just need another opinion. Thanks a ton!
the absolute value of 12 minus the absolute value of -9
Click here to see answer by vleith(1977)   |
Question 137226: My son and I are going round and round about absolute value. We can't come to an agreement on this problem. Please help us!
5 abs-9+13abs +(-1)
I get 19 and my son gets 109
Thank you for your help.
Click here to see answer by vleith(1977) |
Question 137306This question is from textbook
: Could you please help me by solving this equation using the substitution method?
y-2x=-7.5
3x-5y=3.2
y-2x=-7.5 by adding 2x to both sides of the equation
y=2x-7.5
Now substitue y(2x-7.5) into
3x-5(2x-7.5)=3.2
3x-10x+37.5=3.2
-7x+37.5=3.2
-7x=3.2-37.5
-7x=-34.3 by dividing -7 to each side of the equation
x=4.9
Your y answer is:
y=2x-7.5
=2(4.9)-7.5
y=2.3
I would be very much appreciated to you. Please help!
Thank you.
J. RThis question is from textbook
Click here to see answer by tns_tutor5000(9) |
Question 137729: Can someone tell me if I am doing this right? The problem is...1/2|x-2|<4
If I pull the x-2 out of the absolute value, it becomes x+2 so I now have 1/2(x+2)<4. Multiply it out...x + 2/2 < 4. Divide 4 by 2...x + 2/2 < 4/2 So, the answer I get is x < 2.
It seems too easy. Thanks :)
Click here to see answer by stanbon(26295) |
Question 140184: [ 4-5x] -1 = 33
I understand this topic on my HW and get at least an 85% but at test time i almost always fail within the 30% range.
1 more question/example
[ 7k + 2 ]+3 <12
for #1 what i did was
I subtracted 4 from both 4 and 33 which gave me [-5x] -1 =33
then i took away the absolute value bars and made it an equation -5x-1=29
for my answer my teacher said i got the first 1/2 right by getting -6 but for the positive number (i put +6) she said i did it wrong.
for the second one i was the only one who missed it so please tell me if there's a trick
i re-wrote the absolute value and subtracted 3 from all sides then came up with 7k+2
my answer was k<=1 >-3 the less than sign with an equal is less than or equal to. She said i missed the whole thing.
Click here to see answer by scott8148(3385)  |
Question 140788This question is from textbook an intermediate course in algebra
: finishing line is rated by pounds of strain at which it is expected to break. If a fishing line is rated at 60 lbs, the line is expected to break if a fish of about 60 lbs pulls at it. in reality, we do not expect all 60lbs lines to breat at exactly 60lbs. one manufacturer sets the specifications for their 60-pound line to have a tolerance of 5 lbs.
a. on a number line, graph the interval for the weights at which the 60-pound line is expected to break.
b. write a compound inequality representing the interval of the weights at which the 60-pound line is expected to break.
c.write an absolute value inequality representing the interval of the weights at which the 60-pound line is expected to break.
please help.thankuThis question is from textbook an intermediate course in algebra
Click here to see answer by stanbon(26295) |
Question 141762: The reciprocal of 7 is 1/7 since their product is 1 ( 7 * 1/7 = 1) The question I need to answer is "are the reciprocals of 7 and -7 opposites".
The reciprocals of 7 and -7 are 1/7 and - 1/7
Are 1/7 and -1/7 opposites?
Click here to see answer by stanbon(26295) |
Question 141857: if you have 18 - 7 - 6 -4. Under what conditions, the result of the expression would be positive.
Is the positive number is greater than the absolute value of the sum of negative numbers.
Would the result be positive?
Click here to see answer by checkley77(7072) |
Question 142016: Simplify the following expressions using PEMDAS.
2 + 3 ´ 52 - 7
6 + 3[(12 / 4) + 5]
(4 / 2) + 4(5 - 2)2
-8 - 81 / 9 ´ 22 + 7
Write the detailed steps for simplifying each expression. Discuss the advantages of using PEMDAS in simplifying an expression. Also, compare and discuss how you can have different answers to the same expressions with or without the application of the PEMDAS rule.
Click here to see answer by stanbon(26295) |
Question 143508: I am so confused about this question, I don't know where to start. This is how it was typed on the word document.
. Jack was able to travel 30 miles downstream in 2 hours. In returning upstream, it took 3 hours to make the trip. How fast can his boat travel in still water? What was the rate of the river current?
2(r+c)=30--->2r+2c=30-->6r+6c=90
3(r-c)=30---->3r-3c=30--> 6r+6c=60
Click here to see answer by vleith(1977) |
|
Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485
|
| |
