Questions on Algebra: Systems of Linear Equations answered by real tutors!

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Question 391393: Brianna's family spent $134 on 2 adult tickets and 3 youth tickets at an amusment park. Max's family spent $146 on 3 adult tickets and 2 youth tickets. What is the price of a youth ticket?
Click here to see answer by ewatrrr(10682)

Question 391396: carl bought 19 apples of 2 different varieties to make a pie. the total cost of the apples was $5.10. granny smith apples cost $0.25 each and gala apples cost $0.30 each. how many of each type of apple did he buy?
Click here to see answer by solver91311(16868)

Question 391406: i am having problems solving one of my algebra questions. Can you help me please.Hear is the problem.
-2x+16>36+2x
Thank you for your time.
Click here to see answer by solver91311(16868)

Question 391400: 2x+4y

Click here to see answer by Alan3354(30959)

Question 391434: Solve each system by substitution.
y=-3x+9
-4x+2y=-2
Click here to see answer by ewatrrr(10682)

Question 391586: below are a rectangle and a right triangle.
The perimeter of the rectangle is 34 cm. The perimeter of the triangle is 30 cm. Find the values of m and n.
On the right triangle, the base is n and the side is m. The slope however is n+1. The rectangles base is n and the side is m.
Click here to see answer by edjones(7569)

Question 391042: Solve equation and
indicate if system is independent, dependent or inconsistent
Y= -x
Y= -x+3

Click here to see answer by robertb(4012)

Question 391694: I need help on the following word problem: A ring is made out of gold and copper. Gold has a density of 19.3 g/cm3. Copper has a density of 9 g/cm3. Mass m, density d, and volume v are related by the formula m=dv. The ring has a volume of 8.4 cm3, and a mass of 104.44g.
Let a=volume of gold, let c=volume of copper, mass of gold =dv=19.3a, mass of copper=dv=9c.
Solve the following system by elimination to find out how many grams of gold are in the ring.
a+c = 8.4
19.3a+9c=104.44
also what is the percent of gold by mass?
Click here to see answer by mananth(12270)

Question 391551: I'm trying to help my niece with her homework and I can't remember at all how to solve this problem.
She's trying to solve this linear equation or system. She says she's supposed to get the answer by using the 3y?
2x-3y=-7 (negative 7)
3x+y=-5 (negative 5)
I have the answer for her but would really like to know how to solve this and to show her the correct way.
Thank you!
Click here to see answer by ankor@dixie-net.com(15624)

Question 391730: 9=x-2y
3x+5=2y
Click here to see answer by ewatrrr(10682)

Question 391731: x-2y=-5
-3x-2y=-9
Click here to see answer by ewatrrr(10682)

Question 391771: Linear and non-linear Inequalities
For what values of x does the expression represent a real number?
Please solve this inequality drawing a number line and showing the interval notations.
Click here to see answer by stanbon(57219)

Question 391710: my Question is like that :3x+4y=s
6x+8y+t
a)determine particular values for s and t so that the system is consistent.
b)determine particular values for s and t so that the system is inconsistent.
c)what relationship between the values of s and t will guarantee that the system is consistent?
my work was stuck at here :eqn 1+eqn 2
-2s+t=0
2s=t
Click here to see answer by user_dude2008(1861)

Question 391841: Use the substitution method to solve the linear system.
y=3x
x=3y
Click here to see answer by richard1234(5390)

Question 391805: how do you solve/ write an equation in slope-intercept form for a line that passes through the given point and is parrel to the given line
y=-1/2+4x;(-3,5)

Click here to see answer by rfer(12644)

Question 391852: I need help solving these equations using the elimination method.
x + 8y = 28
-x + 5y = 11
5x + 2y = -13
7x - 3y = 11
0.3x - 0.2y = 4
0.2x + 0.3y = 29/19
8x - 9y = 32.5
7y - 2x = -10.5
0.05x + 0.25y = 11
0.15x + 0.05y = 12

Click here to see answer by richard1234(5390)

Question 391889: Solve using substitution method
6m + n = 29
m - 6n = 48
Click here to see answer by stanbon(57219)

Question 391399: 25x+30y=510 solve for x
Click here to see answer by jerryguo41(162)

Question 391399: 25x+30y=510 solve for x
Click here to see answer by richard1234(5390)

Question 391999: 4x + 5y=250

Click here to see answer by Alan3354(30959)

Question 392024: solve if possible 3x+y+z=0
2x-y+z=0
2x+y+z=0
Click here to see answer by Alan3354(30959)

Question 392024: solve if possible 3x+y+z=0
2x-y+z=0
2x+y+z=0
Click here to see answer by edjones(7569)

Question 392060: Use substitution to determine if the given ordeded pair is an element of the solution set ofr the system of equations

(2,8)
y-2x=4
2y+x=-8
Click here to see answer by rfer(12644)

Question 392280: what is 4x-3=7
Click here to see answer by ewatrrr(10682)

Question 392280: what is 4x-3=7
Click here to see answer by MathLover1(6614)

Question 392308: 15x-5y=-20
-3x+y=4
Click here to see answer by Alan3354(30959)

Question 392341: find an equation of the line containing the given pair of points. Express your answer in the form x =a,y=b or y=mx+b (-1,_1) and (9,9) what is an equation of the line?
Click here to see answer by NancyLam(35)

Question 392474: find the slope-intercept equationof the line that had the given characteristics slope 4 and y- interceot (0,3)
Click here to see answer by rfer(12644)

Question 392474: find the slope-intercept equationof the line that had the given characteristics slope 4 and y- interceot (0,3)
Click here to see answer by stanbon(57219)

Question 392306: A two digit number is 6 times its units digit. Find the number if the sum of its digits is 6.
Click here to see answer by ankor@dixie-net.com(15624)

Question 392464: can u help me with an equation plz the equation is:
x
- - 2=6
2
Click here to see answer by fafa(13)

Question 392668: a ine passes through (3,4)and(4,7)
write an equation for the line in point slope form
rewrite the equation in standard form using integers
Click here to see answer by Alan3354(30959)

Question 392664: carlos and maria drove a total of 280 miles in 5.5 hours. carlos drove the forst part of the trip and averaged 49 miles per hour. maria drove the remainder of the trip and avereged 54 miles per hour. for approximately how many hours did maria drive? round your answer to the nearset tenth if necessary.
Click here to see answer by nerdybill(6948)

Question 392730: elimination
x+3y=14
2x-3y=-8

Click here to see answer by Alan3354(30959)

Question 392730: elimination
x+3y=14
2x-3y=-8

Click here to see answer by ewatrrr(10682)

Question 392775: 7x-(2x-12)=-8
Click here to see answer by stanbon(57219)

Question 392937: Pablo's Pizza pays $8/hour for their delivery persons. Pedro's Pizza pays $6/hour and $1.25 per delivery for their delivery persons. How many deliveries must be made at Pedro's Pizza in order to be paid more for an 8-hour shift?
Click here to see answer by robertb(4012)

Question 393039: 4
-(2x-3)>12
5
Click here to see answer by mananth(12270)

Question 393058: I'm struggling to help my 8th grade daughter with her algebra........
this is one.......the solution to which system of equations has a positive y value? 4 choices are listed but this is the one that's supposed to be correct---
y=3x+3 and 2x+3y=0. I keep coming up with a negative value. Can you help? Thank you!
Click here to see answer by jim_thompson5910(28476)

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