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

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

Question 620554: y=4xx+y=5 how do i help my son solve whether it has one solution, no solution or many?
Click here to see answer by ewatrrr(10682)

Question 620242: Nelson wants to use a few pieces of silver to make a bracelet. Some of the jewelry is 70% silver, and the rest is 58% silver. Nelson needs 26.00g of 65% silver. How much of each alloy should he use?
Click here to see answer by ankor@dixie-net.com(15745)

Question 620674: It says, Simplify each expression. Show any factoring and canceling
10y-30/y^2-1 I have 10(y-3) / (y-1) (y+1).. Is that right am I missing any steps??
Thank you!
Click here to see answer by jim_thompson5910(28696)

Question 183533: Find the product.
5(a+3)=
Click here to see answer by lenny460(829)

Question 621096: find the slope intercept form for the line satisfying the following conditions x-intercept 2, y-intercept 4/5. The slope intercept form for the is_________
Click here to see answer by math-vortex(472)

Question 621385: If p = 2(L+B),make b the subject of the formula
Click here to see answer by ewatrrr(10682)

Question 621425: Translate into an algebraic expression, then simplify.
Subtract 4x – 2 from 3x – 3.
Click here to see answer by nerdybill(7003)

Question 621518: What is the square root of 17 -1/8?
Click here to see answer by Alan3354(31487)

Question 621498: use substitution to solve each system of equations. if the system of equation does not have exactly one solution, state whether it has no solution or infinitely many solutions.
x=3-2y
2x+4y=6
Click here to see answer by math-vortex(472)

Question 621587: The Martinez family and the Thomas family each used their sprinklers last summer. The water output rate for the Martinez family's sprinkler was 15L per hour. The water output rate for the Thomas family's sprinkler was 40L per hour. The families used their sprinklers for a combined total of 40hours, resulting in a total water output of 1225L. How long was each sprinkler used?
Click here to see answer by Amit Kumar Singh STANME(1)

Question 622170: Tickets sold in advance for a play cost $3 each. Tickets sold at the door for the same play cost $5 each. If 100 tickets were sold for this play for a total of $460, how many were purchased at the door?
Click here to see answer by matineesuxxx(27)

Question 622176: The sum of 3 consecutive odd integers is between 21 and 39. Which of the following inequalities exprsses the relationship if n represents the smallest integer?
21<3n+4<39
21<6n<39
21<3n+3<39
21<3n+6<39
Click here to see answer by matineesuxxx(27)

Question 622171: A 144-inch length of pipe is to be cut into 3 pieces. The second piece is twice as long as the first piece. The third piece is 20 incheslonger than the first piece. Each piece is to be sold to a different customer. If the pipe costs $0.08 per inch, how much will the longest piece of pipe cost?
Click here to see answer by matineesuxxx(27)

Question 622067: By what number should you multiply the first equation to solve using elimination?
–2x – 5y = –16
–8x + 3y = –18
Click here to see answer by ankor@dixie-net.com(15745)

Question 622220: Simplify:
(-5xsquaredysquared()4csquaredxcubedy to the 8th)
Click here to see answer by lynnlo(4169)

Question 622686: In the expression below, b is called the _____, and n is called the exponent.
b to the power of n.
Click here to see answer by lynnlo(4169)

Question 622994: Solve this equation:
4 and a half (3y) =12
Click here to see answer by Alan3354(31487)

Question 623141: Perform and simplify

Would be the correct answer?
Click here to see answer by fcabanski(888)

Question 623693: Solve using the SUBSTITUTION method. Must show all work for FULL credit. If system has no solution or an infinite number of solutions, Please state this.

3x + y = 26
-6x + y = -37
Thank you for your help -I am not really dumb, I just don't understand algebra.

Click here to see answer by ewatrrr(10682)

Question 623711: How would we check 3/a+1=5/a+7 I figured it out it come out to 13=a how do you check that please help!?
Click here to see answer by solver91311(17059)

Question 623726: I need help with 4a=3-b
4a=2-b
Click here to see answer by ewatrrr(10682)

Question 623767: translate english expressions to algebraic expressions using any variables.the difference between a number and 15?
Click here to see answer by fcabanski(888)

Question 623751: 5x3 + 40y6

Click here to see answer by Earlsdon(6294)

Question 623692: Suppose you live 3.6 miles from a hill. From your home you see a plane directly above the hill. Your angle of elevation to the plane is 28 degrees. What is the planes altitude. Thank you!
Click here to see answer by Alan3354(31487)

Question 623778: Im just wondering if I got this question right, multiply (a-6^2) my answer is a^2+12+36 ??
Click here to see answer by fcabanski(888)

Question 623818: The measure of the length of a field is 3x + 4 feet and the measure of the width of the field is x + 7 feet. Find an expression for its perimeter
Click here to see answer by lwsshak3(6742)

Question 624052: Solve the formula for the indicated variable. S=L(1-r) ,for r
Click here to see answer by jim_thompson5910(28696)

Question 624114: Consider the line y=7x-6
Find the equation of the line that is parallel to this line and passes through the point (6,-5)
Find the equation of the line that is perpendicular to this line and passes through the point (6,-5)
Click here to see answer by math-vortex(472)

Question 624158: Suppose that the amount of time it takes to build a highway varies directly with the length of the highway and inversely with the number of workers. Suppose also that it takes 150 workers 14 weeks to build 12 miles of highway. How many workers would be needed to build 15 miles of highway in 21 weeks?
Click here to see answer by lwsshak3(6742)

Question 624295: Solve the formula for the indicated variable. S=lw+wh+lh ,for w
Click here to see answer by nerdybill(7003)

Question 624335: add the following expression:
10/x - x/x+3=

Thanks!
Click here to see answer by ewatrrr(10682)

Question 624343: Which expression would represent "twelve diminished by six times a number"?
Click here to see answer by ewatrrr(10682)

Question 624411: add the following expression:
10/x - x/x+3=
Thank you :)
Click here to see answer by jim_thompson5910(28696)

Question 624457: how do you solve this order of operation problem step by step?
(1/2+1/3)/(2/3-1/12)

Click here to see answer by Theo(3504)

Question 624729: Divide (11x^2 + 2x^3 +14 + 17x) ÷ (2x + 5)
Click here to see answer by ewatrrr(10682)

Question 624819: Solve D = ABC for A .
Click here to see answer by Alan3354(31487)

Question 624945: COMPLEX expressions, ADD and Simplify.
(-5.2-5.3i) + (-8.5 + 6.9i)

My solution Answer is: -13.7 + 1.6i ( am I correct? )
Click here to see answer by Alan3354(31487)

Question 624946: SHORT ANSWER! Simplify the expression: and Express in terms of i
sqrt of -64
Click here to see answer by Alan3354(31487)

Question 625076: Using a scientific notation to divide the following two numbers.
Express the answer using scientific notation; retain at least
three decimal places.
(9.4.10^6)/(4.97.10^2)
Thank you in advance!
Click here to see answer by oscargut(900)

Question 625080: Simplify the following expression, and rewrite it in an equivanent form with POSITIVE exponents.
-7y^2
--------
21x^3y-^3
Click here to see answer by oscargut(900)

Question 625081: Raise the quanity in parentheses to the indicated exponent, and simplify the resulting expression. Then express your answer with a POSITIVE exponents.
( 30x^3y-5)^2
(---------)
(150x^-4y^2)
Super Big Thank you in advance!
Click here to see answer by oscargut(900)

Question 625289: Use synthetic division to divide then write the Q(x) and the remainder r.

Click here to see answer by jankiz(13)

Question 625330: Subtract the complex expressions, and SIMplify.
(4.1+6.3i)-(-9.4+3.4i)
I got 13.5 + 2.9i am I correct?

Thanks in advance....
Click here to see answer by lynnlo(4169)

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