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test/297381: Indicate which of the following sets of lines are parallel,perpendicular,or neither.Show your work and explain why you chose the answer you did.21.
(a) y=2x-5,y=2x+5
(b) 3x+y=5,-x+3y=6
(c)3x+y=5,x+y=3
I am really confused and don't even know how to work this out(I've looked in the book) PLEASE help....THANKS VERY MUCH! =)
p.s. They only give a line this big to explain why I chose the answer I did.________________________
1 solutions
Answer 214163 by richwmiller(9143)   on 2010-04-27 17:22:34 (Show Source):
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Linear_Equations_And_Systems_Word_Problems/297333: The Carmike 14 Theatre charges $8 for an adult ticket and $4.50 for a child’s ticket. On a particular Friday night, the entire 950 seat theater was full. The total ticket receipts for the evening were $6462.50. How many of each type of ticket were sold?
1 solutions
Answer 214158 by richwmiller(9143) on 2010-04-27 17:01:40 (Show Source):
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Geometry_Word_Problems/297365: Suppose that the length of a certain rectangle is three times its width. If the length is decreased by 4 inches and the width increased by 1 inch, the newly formed rectangle has an area of 40 square inches. Find the length and width of the original rectangle.
x+y*3 x-4 y+1 = 40 ?
1 solutions
Answer 214153 by richwmiller(9143) on 2010-04-27 16:52:47 (Show Source):
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Equations/297267: A chemist has a 80mL of a 12% acid solution. How many mL of base must be added to get a mix that is an 8% acid solution
1 solutions
Answer 214151 by richwmiller(9143) on 2010-04-27 16:47:56 (Show Source):
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Triangles/297332: What are the lengths of the two legs of a 30°-60°-90° triangle if the length of the hypotenuse is 12 root 3?
1 solutions
Answer 214147 by richwmiller(9143) on 2010-04-27 16:39:24 (Show Source):
You can put this solution on YOUR website!Do you mean 12 square root of 3
12*sqrt(3)=20.78
The shorter leg is 6sqrt(3)=10.39
The longer leg is 6*sqrt(3)*sqrt(3)=18
In a 30 60 90 right triangle the hypotenuse is 2x the shorter leg 1x and the longer leg is sqrt(3)*x
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Equations/297354:
(c). Long’s Peak in Rocky Mountain National Park, is 14,255 feet in elevation. How far can you see to the horizon from the top of Long’s Peak? Can you see Cheyenne, Wyoming (about 89 miles away)? Explain your answer.
1 solutions
Answer 214142 by richwmiller(9143) on 2010-04-27 16:29:32 (Show Source):
You can put this solution on YOUR website!one problem at a time
no similar problem
I answered c this morning.
http://www.algebra.com/algebra/homework/Radicals/Radicals.faq.question.175540.html
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Distributive-associative-commutative-properties/297349: can you show the steps of solving this problem by cross multiplying (7-2n)/(7+2n)=1/18
1 solutions
Answer 214138 by richwmiller(9143) on 2010-04-27 16:22:27 (Show Source):
You can put this solution on YOUR website!This is one reason that many teachers don't like "cross multiplying"
Cross multiplying is a short cut to this
Multiply both sides by 7+2n
Multiply both sides by 18
In cross multiplying you just remove the denominators and multiply the opposite numerator by the denominator
a/b=c/d
multiply c*b and a*d
Multiply the numerator on one side by the denominator on the other side.
Do it again with the other side.
So in the end you should have
(7-2n)*18 = 1*(7+2n)
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Travel_Word_Problems/297342: a plane traveling into a headwind travels 920 miles in 4 hours and 36 minutes. The return trip takes 4 hours. what is the speed of the plane and the wind assuming that both are constant?
1 solutions
Answer 214128 by richwmiller(9143) on 2010-04-27 16:13:32 (Show Source):
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Triangles/297337: A new house is 32 feet wide. The rafters will
rise at a 36° angle and meet above the center line of the house.
Each rafter also needs to overhang the side of the house by 2
feet. How long should the carpenter make each rafter?
help please? Much appreciated. I have the triangle drawn but am lost as to how to solve it using sine, cosine, and tangent functions. thanks again!
1 solutions
Answer 214123 by richwmiller(9143) on 2010-04-27 16:02:37 (Show Source):
You can put this solution on YOUR website!The rafters form a triangle with the base angles 36 and the peak angle 180-72=108
If we drop a line from the peak angle to the middle of the house that is at 16 feet
We have a right triangle with one leg 16.
We have angles 36 90 and 54
the hypotenuse will be the length of the roof from the peak to the 36 degree angle.
so we have the base as 16 and the hypotenuse
we have hypotenuse and adjacent (16) and angle 36
After you calculate the rising rafter, be sure to add 2 feet.
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Human-and-algebraic-language/297300: I cannot figure out how to work this problem, can you please help.
The sum of twice a number and 11 less than the number is the same as the difference between -35 and the number. What is the number.
I have tried this several ways.
2(x-11)=-35+x
2x -11-x=-35-x
Neither one comes out. Can you please show me where I am going wrong?
1 solutions
Answer 214113 by richwmiller(9143) on 2010-04-27 15:24:13 (Show Source):
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Quadratic_Equations/297312: I have three problems, I really do not understand Quadratic equations or the formula.
1. (x - 1)^2 = -49 (quadratic equation, solve)
If they are real, specify whether they are rational or irrational.
1 solutions
Answer 214112 by richwmiller(9143) on 2010-04-27 15:22:17 (Show Source):
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Polynomials-and-rational-expressions/297303: Can someone help me figure out if the polynomial below is a monomial, trinomial or a bionomial or none of these. I just do not understand how to determine this and any explanation would greatly be appreciated. Thank you.
-19s^7-4s-8
1 solutions
Answer 214108 by richwmiller(9143) on 2010-04-27 15:01:34 (Show Source):
You can put this solution on YOUR website!poly means many
mono means one
bi means two
tri means three.
We are talking about terms
You are combining the terms.
-19s^7 and
-4s and
-8
count the terms.
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Rational-functions/297172: Hey what happened I thoiught you guys were supposed to respond back in a timely manner. I submitted a question yesterday and still not so much as a return message. If you guys don't respond yhen I can not go forward with my studies.
Here's my equation: Also if you could show me the steps and show me any tipps for solving this kind of question it would be greatly appreciated.
1 solutions
Answer 214106 by richwmiller(9143) on 2010-04-27 14:56:37 (Show Source):
You can put this solution on YOUR website!Hey what happened I thoiught you guys were supposed to respond back in a timely manner.
Response:
Wrong! We are volunteers. We don't have to do anything.
You are extremely lucky that anyone even responded to your problem.
I submitted a question yesterday and still not so much as a return message.
Response: So! Big deal.
We are volunteers. We answer 80% or more.
If you guys don't respond yhen I can not go forward with my studies.
Response:
Like we believe that!
it would be greatly appreciated.
Response: You should be.
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logarithm/297159: I do not understand any of these.. I know it seems kind of like a lot but these are the last few on a paper of 200questions that I don't understand =[
I put "v" next to the numbers and symbols that are supposed to go down.
1.) log7 +
1 solutions
Answer 214102 by richwmiller(9143) on 2010-04-27 14:43:55 (Show Source):
You can put this solution on YOUR website!It is not kind like a lot. It is a lot and a violation of the rules.
Check out these rules of the website and count your violations.
One problem at a time.
No similar problems.
Limit 4 problems a day
Use correct category
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real-numbers/297280: Form the inverse: If I eat a lot of sweets, then I will not feel well.
If I do not feel well, then I ate a lot of sweets.
If I do not eat a lot of sweets, then I will feel well.
If I feel well, then I did not eat a lot of sweets.
If I do not feel well, then I did not eat a lot of sweets.
If I feel well, then I did not eat a lot of sweets.
1 solutions
Answer 214099 by richwmiller(9143) on 2010-04-27 14:29:08 (Show Source):
You can put this solution on YOUR website!If I eat a lot of sweets, then I will not feel well.
Inverse : Negate both terms. Keep same order.
If I do not eat a lot of sweets, then I will feel well.
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real-numbers/297289: Determine if the argument is valid or invalid. Give a reason to justify answer.
You get soup or you get salad.
You did not get soup.
You got salad.
Valid by the law of detachment
Valid by the law of contraposition
Invalid by fallacy of the converse
Invalid by fallacy of the inverse
Valid by the law of syllogism
Valid by disjunctive syllogism
1 solutions
Answer 214097 by richwmiller(9143) on 2010-04-27 14:21:02 (Show Source):
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