Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

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Algebra: Expressions involving variables, substitution

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Question 95120This question is from textbook Algebra 1
: I'm in 8th grade taking algebra so I can get a high school credit and so far we have had four teachers since school started in July. We have the smart board system but it has been down for several days and the teacher realy didn't explain the work that we have been doing and it really confuses me can you please help me undetstand this more?This question is from textbook Algebra 1

Click here to see answer by ankor@dixie-net.com(6691)

Question 95245: I don't understand this problem:
I've recieved many different answers for this problem and now I'm confused and I don't know what to do.
4/8 divided by 4/3 is what ?????
Click here to see answer by stanbon(26259)

Question 95243: I don't understand this problem:
The peremeter of a rectangle is 100 ft. One side is 6ft longer than the other side. What is an equation to find the legth of "x" of the shorter side? Do not slove. Only find an equation that will satisfy the qustion.
Click here to see answer by checkley71(8405)

Question 95240: SLOVE:
8X-10=2X
Click here to see answer by checkley71(8405)

Question 95241: Simplify:
PLEASE HELP ME

Please help me, I've recived many different asweres for this problem and I'm not sure how to do it or which answer is correct.

(16^-1 x^-4 y612)^-3/4
This problem is: Parenthesis 16 raised to the negative 1, x raised to the ngative 4th y raised to the 12th, end of parenthesis. Outside of the parenthesis, the whole problem is raised to negative 3 over 4. The question asks to simplify this problem
Click here to see answer by scott8148(3382)

Question 95242: I can't seem to understand this problem..

Please help me, I'm beging someone ....PLEASE

F(X)=X^2-2, THEN, F(X+2)-F(X)=????
Click here to see answer by ionesco(12)

Question 95244: I don't understand this problem:

Solve:
10ax-5=6x+4
Click here to see answer by stanbon(26259)

Question 95365: twice the sum of 15 and a number
Click here to see answer by Edwin McCravy(2920)

Question 95379This question is from textbook
: Number of hours in m minutesThis question is from textbook

Click here to see answer by edjones(3291)

Question 95335: I don't know how to set this problem up and i can solve it on my own if you could just show me how to set the problem.
"Kara has driven 75 miles. She averages 55 mi/h. How many more hours must kara drive to travel a total of 350 miles?"
This is a variable problem that is in word problem form.
If you could just please get back to me soon it would be much appreciated..
Thanks!
Katie
Click here to see answer by ankor@dixie-net.com(6691)

Question 95362: twice the sum of 15 and a number
Click here to see answer by scott8148(3382)

Question 95418: Casey and Clarissa want to surprise their father and build a fence for the pig pen in the shape of a Triangle. They have 74' of fencing.
The second side of the fence is two times longer than the first side. The third side of the fence is 10 feet longer than the first side. What are the dimensions of the tringular fence.
I tried: x + 2x + 10 + x = 74
4x - 10 = 74 - 10
4x = 64
This is where I get lost, as to what calculatons come next. Do I divide?...the final numbers do not total 74! Help!
Click here to see answer by checkley71(8405)

Question 95429: n
___=c-n, solve for n
a+b

Click here to see answer by edjones(3291)

Question 95428: Prt=I, solve for r
Click here to see answer by edjones(3291)

Question 95516: Hi can you help me work the following problem?
The elevator in the Washington Monument takes 75 seconds to travel 500 ft. to the top floor. What is the speed of the elevator in miles per hours? Give your answers to two significant digits.
Thanks.

Click here to see answer by bucky(1732)

Question 95403: The opposite sides of any rectangle are equal. If a rectangle is twice as long as it is wide and its perimeter is 48 inches, how wide is it? How long?
Click here to see answer by bucky(1732)

Question 95543: One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.
I have tried this below, but I am unsure if I have done this correctly. This is so confusing, and driving me crazy as I try to figure this out.
x(x+12)=x+2x
Click here to see answer by stanbon(26259)

Question 95563: Each student is given 20 problems. Five points are awarded for each correct answer, and two points are deducted for each incorrect answer. Ellen's score was 72. How many correct answers did she have?
Is this the correct way:
20(5x-2y)=72
Click here to see answer by checkley71(8405)

Question 95342: can you help me write an algebraic expression in words for these problems?
15-b, z-7, x/16, (2)(t). my teacher went over it with our class, but i didn't understand it.
Click here to see answer by kiljoy(51)

Question 95889This question is from textbook mcdougal littell
: 5a+5b divided by 5a+10This question is from textbook mcdougal littell

Click here to see answer by checkley71(8405)

Question 95889This question is from textbook mcdougal littell
: 5a+5b divided by 5a+10This question is from textbook mcdougal littell

Click here to see answer by tutorcecilia(2042)

Question 95940: 1/2x - 1/6y = 3
2/5x + 1/2y = 2
These are to be solved using the elimination method. I do not even know where to begin! Help please!
Thank You
Nancy
Click here to see answer by scott8148(3382)

Question 95987This question is from textbook algebra structure and method book1

: Inga lives 3 miles more than twice as far from school as Brent. If Brent lives b miles from school then INga lives____miles from school.

I can't figure out the expression this is what I am trying ???? inga = 2(brian) +3 Brian = School + b This question is from textbook algebra structure and method book1

Click here to see answer by ankor@dixie-net.com(6691)

Question 95998: Answer each question with an algebraic expression. You are not writing equations, so do not try to solve.
a) One number is six less than five times another number. If the smaller number is x, what is the larger number in terms of x?
b) The sum of two numbers is 35 and the smaller number is y, what is the larger number in terms of y?
Click here to see answer by ptaylor(1578)

Question 95997:
Answer each question with an algebraic expression. You are not writing equations, so do not try to solve.
a) One number is six less than five times another number. If the smaller number is x, what is the larger number in terms of x?
b) The sum of two numbers is 35 and the smaller number is y, what is the larger number in terms of y?
Click here to see answer by checkley71(8405)

Question 96119: if 1=2n what's its property?
Click here to see answer by Earlsdon(4898)

Question 96150: {4x-2y=9
y=2x+5
Click here to see answer by checkley71(8405)

Question 96226: how old is pepe if 9 years he will be 4 years as old as he is now.
Click here to see answer by stanbon(26259)

Question 96238: y-1 divided by 5 equals 6
what is Y?
Click here to see answer by prabhjyot(164)

Question 96258: write as an algebraic expression.
the number of days in x weeks
Click here to see answer by tutorcecilia(2042)

Question 96318: I need help simplifying the expression (2/3a)(3/2b)
Click here to see answer by checkley71(8405)

Question 96330This question is from textbook Algebra 1
: Hi i am on page 54 and my problem is 15.15.15. aand my teacher gave me 3,375 how do i do itThis question is from textbook Algebra 1

Click here to see answer by checkley71(8405)

Question 96254: write as an algebraic expression.:
the number of days in x weeks
Click here to see answer by mathman409(67)

Question 96421: 3c+5d=17
3c+8d=5
Click here to see answer by checkley71(8405)

Question 96448This question is from textbook
: Fruit baskets cost $16 each. How many do you have to sell to raise $115?This question is from textbook

Click here to see answer by anjali_yamini(27)

Question 96514: y=mx+b solve for m
Click here to see answer by stanbon(26259)

Question 96342: If you have $8000 to invest for college and you are investing part at 7% interest and part at 5% interest, how much should you invest at each rate in order to get $500 in interest after one year?
Click here to see answer by scott8148(3382)

Question 96644: 18 and three times d
Click here to see answer by checkley71(8405)

Question 96639: HOW DO YOU TRANSLATE THE VERBAL PHRASE INTO AN EXPRESSION OF "THE QUOTIENT OF TWICE A NUMBER t AND 12
Click here to see answer by checkley71(8405)

Question 96827: 2. The sum of three consecutive even integers is 114
a. Define a variable for the smallest integer
b. Define variables to represent the 2nd and 3rd integers
c. Write an equation for the sum of the tree consecutive even integers.
d. Solve the equation to find the three even integers.

Click here to see answer by jim_thompson5910(13787)

Question 96703This question is from textbook College Algebra
: I need help setting up this word problem...I have tried several approaches and none of them seem to work..the problem states:
A cosmetics company sells 12,800 bottles of lotion a month at a selling price of $6.50. A marketing survey indicates that for each $0.25 decrease in selling price, the monthly sales will increase by 900. Determine an equation relating the selling price, p and the number x of bottles sold.
How do I do this? This question is from textbook College Algebra

Click here to see answer by scott8148(3382)

Question 97038: 12-8x+3
Click here to see answer by jim_thompson5910(13787)

Question 97063: I am having difficulty with this problem. Solve the System.
x+4y=8
3x=3-12y
Here's what I came up with...
x = -7/15
y = 2/3
It doesn't seem correct.
Click here to see answer by mathslover(126)

Question 97095: y = (3x)/(x+1)
Solve for x
Click here to see answer by checkley71(8405)

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