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

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 455820: Solve |8x+2|-4=18.
A) -2 and -3
B)-3/2 and 2
C) -3 and 5/2
D 3/2 and -2
Click here to see answer by stanbon(57424)

Question 455822: What are the x-intercepts of the graph of y=(2x+3)(x-5)?
A) -3/2 and 5
B) -3/2 and -5
C) 3/2 and 5
D) 3/2 and -5
Click here to see answer by stanbon(57424)

Question 455824: the total value of the tokens in 2 bags is 2500 pounds where the red tokens value is 7 pounds each and the blue tokens value is 9 pounds each . how many tokens are (a)red . (b) blue .
Click here to see answer by stanbon(57424)

Question 455763: Solve the linear system by using elimination. 1/2x-3/2y=-29/2 , -1/2x+3y=33
Click here to see answer by solver91311(16897)

Question 455993: What Is the evaluation of 4 - (2 - r)+ 3
Click here to see answer by rfer(12678)

Question 456020: If 9^a *3^c = 177,147,
then 2a+c=
Click here to see answer by mananth(12270)

Question 456020: If 9^a *3^c = 177,147,
then 2a+c=
Click here to see answer by solver91311(16897)

Question 456377: Jennifer is twice as old as Ramon. The sum of their ages 7 years ago was 13. how old are they now?
Click here to see answer by richwmiller(9143)

Question 456454: for which value of m is the expression 15m^2/(3-m) undefined?
a. 1
b. 0
c. 3
d. -3
Click here to see answer by rfer(12678)

Question 456454: for which value of m is the expression 15m^2/(3-m) undefined?
a. 1
b. 0
c. 3
d. -3
Click here to see answer by richwmiller(9143)

Question 456457: for which value of m is the expression 15m^2/3-m undefined? show work
a. 1
b. 0
c. 3
d. -3

Click here to see answer by richwmiller(9143)

Question 456599: How do I substitute a problem like this?
y = x + 3
y = 2x + 12
Click here to see answer by mananth(12270)

Question 456640: christine went shopping and bought each of her five nephews a gift, either a video costing $14.95 or a cd costing $16.88. She spent $80.54 on the gifts. How many videos and how many cds did she buy?
Click here to see answer by richwmiller(9143)

Question 456650: At the begining of a walk, Roberto and Juaita are 6.6 miles apart. If they leave at the same time and wal in the same direction, Roberto overtakes Juanita in 11hours. If they wal towards each other, they meet in 1 hour. What are their speeds?
Click here to see answer by mananth(12270)

Question 456682: Simplify
1[-32 - (79 - 31)]= -80

Click here to see answer by indonesia00(3)

Question 456748: x/4 for x= 12
Click here to see answer by MathLover1(6649)

Question 456906: A restaurant has fixed costs of $143.75 per day and an average unit cost of $5.75 for each meal served. If a typical meal costs $7, how many customers must eat at the restaurant each day for the owner to make a profit?
Click here to see answer by mananth(12270)

Question 456911: A computer store has fixed costs of $8,925 per month and a unit cost of $850 for every computer it sells. If the store can sell all the computers it can get for $1,275 each, how many must be sold for the store to break even?
Click here to see answer by richwmiller(9143)

Question 456924: A machine to mill a brass plate has a setup cost of $600 and a unit cost of $3 for each plate manufactured. A bigger machine has a setup cost of $800 but a unit cost of only $2 for each plate manufactured. Find the break point.
Click here to see answer by richwmiller(9143)

Question 456910: A machine to mill a brass plate has a setup cost of $600 and a unit cost of $3 for each plate manufactured. A bigger machine has a setup cost of $800 but a unit cost of only $2 for each plate manufactured. Find the break points.
Click here to see answer by indonesia00(3)

Question 457040: (-10xy-15y)/5y
Click here to see answer by richwmiller(9143)

Question 457089: Solve by substitution method
3x-y=1
2x-3y=10

Click here to see answer by algebrahouse.com(1079)

Question 457097: Par on a golf course is 72. If a professional golfer shot rounds of 78, 70, and 70 in a tournament, what will she need to shoot on the final round to average par?
Click here to see answer by Alan3354(30993)

Question 457099: Some bank robbers leave town, speeding at 71 mph. Twelve minutes later, the police give chase, traveling at 80 mph. How long will it take after the robbery for the police to overtake the robbers?
Click here to see answer by rfer(12678)

Question 457098: After being discounted 45%, a radio sells for $49.20. Find the original price.
Click here to see answer by rfer(12678)

Question 457491: Given that , find
i) the value of y when and ,
ii) x in terms of a and y.

*Please answer as soon as possible.
Click here to see answer by josmiceli(9698)

Question 457491: Given that , find
i) the value of y when and ,
ii) x in terms of a and y.

*Please answer as soon as possible.
Click here to see answer by amoresroy(333)

Question 457679: x/9+3/8=5/8x
Click here to see answer by MathLover1(6649)

Question 457742: 8/x+7-5/x-3
They are supposed to be fractions. So the 8 is over x+7, same with the 5 and x-3.
Click here to see answer by MathLover1(6649)

Question 457864: Can you please provide me with a formula that I can use to solve this, and similar, problems? Thanks sooo much!

The high school baseball team played 6 fewer games this year than last year but won 60% of the games played, compared with 50% of its games last year. The team won one more game this year than last year. How many games did the team play each year?
Click here to see answer by josmiceli(9698)

Question 458024: If =,then m(n-2)+n(m-2)is?
Click here to see answer by Alan3354(30993)

Question 458021: The value of x,y and z respectively on simplifying the equation 2x+3y=0,3y+4z=14.2x+4z=26 is?Thanks a lot.
Click here to see answer by Alan3354(30993)

Question 458139: A piece of sheet metal, w = 18 inches wide, is bent to form the gutter shown in the illustration. If the cross-sectional area is 28 square inches, find the depth of the gutter.

Click here to see answer by ankor@dixie-net.com(15667)

Question 458259: Can you please help me with the following problem?
6b = 3(b-33)
Thank you! I am trying to help my son with his homework. I appreciate your help.
Kerri
Click here to see answer by rfer(12678)

Question 458281: please help solve this -4x-(-8)=-32 solve for x
Click here to see answer by solver91311(16897)

Question 458281: please help solve this -4x-(-8)=-32 solve for x
Click here to see answer by MathLover1(6649)

Question 458405: If ,then m(n-2)+n(m-2)is?options are (a)-1,(b)1 (c)0 (d)1/2
Click here to see answer by jim_thompson5910(28598)

Question 458620: 7x=5+5x
Click here to see answer by rfer(12678)

Question 459168: Solve by substitution. Check your answer.
x = 2y
y = 2x + 3
Click here to see answer by algebrahouse.com(1079)

Question 459417: You are given that √8=2ⁿ⁺¹
Find the value of n
Click here to see answer by sudhanshu_kmr(1152)

Question 459422: Find the value of
1) 32⅕ (32 to the power of 1/5)
2) 32 ⅖ (32 to the power of 2/5)
Thanks :)
Click here to see answer by sudhanshu_kmr(1152)

Question 459422: Find the value of
1) 32⅕ (32 to the power of 1/5)
2) 32 ⅖ (32 to the power of 2/5)
Thanks :)
Click here to see answer by stanbon(57424)

Question 459426: A large rectangular movie screen in an Imax theater has an area of 6,984 square feet. Find the dimensions of the screen if it is 25 feet longer than it is wide.
Click here to see answer by edjones(7569)

Question 459739: I am so lost, I understand the concept but not when fractions and decimals are involved please help!
Solve by elimination method, type the solution as an ordered pair.
1) 5x + 5y= -13
7x -2y= 11
2)0.3x-0.2y=4
0.2x+0.3y=5/25
3)8x -9y=24.5
7y-2x= -8.5
4)0.05x+0.25y=44
0.15x+0.05y=48
Click here to see answer by richwmiller(9143)

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