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

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Question 253317: According to the Guinness Book of World Records, the peregrine falcon has a record diving speed of 168 miles per hour. Write this speed in feet per second.
Click here to see answer by palanisamy(496)

Question 253318: An Everglades air boat travels 78 miles downstream in the same amount of time it requires to move upstream a distance of 48 miles. The boat's engines drive in still water at an average rate of 16 mph greater than the rate of the current. Find the speed of the boat and the water current. (Find the system of two equations and use the system to find the speed of the boat and the current).
Click here to see answer by palanisamy(496)

Question 253360: which equation is equivalent to y=3x^2+6x+5?
A. y=3(3x+3)^2-9
B. y=3(x+3)^2-4
C. y=3(x+1)^2+4
D. y=3(x+1)^2+2
Click here to see answer by palanisamy(496)

Question 253410: Pam is playing with red and black marbles. The number of red marbles she has is three more than twice the number of black marbles she has. She has 42 marbles in all how many red marbles does Pam have?
I got 29 red marbles but i am not sure if the equation i used to solve it was correct.
2x+3=42

Click here to see answer by tushki(2)

Question 253413: solve the linear system:
2x = 3y
x+3y = 9

Click here to see answer by stanbon(57967)

Question 253413: solve the linear system:
2x = 3y
x+3y = 9

Click here to see answer by richwmiller(9144)

Question 253411: How to solve linear system:
2x + 4y = 0
3x + 7 = y
Click here to see answer by richwmiller(9144)

Question 253391: for y=3|7-2x| + 5, which set describes x when y<8?
A. {x|3 B. {x|3 C. {x|x<3 or x>4}
D. {x|x<3 or x> 10}
Click here to see answer by edjones(7569)

Question 253427: hello my question is to solve 755=(755/36y)+(-755/66x)
y=(18/5x)+(348/5)
to solve using elimination thank u so much for ur help
Click here to see answer by richwmiller(9144)

Question 253597: -2(-1)+y=0
Click here to see answer by checkley77(12569)

Question 253612: A child is holding nickels, dimes and quarters in his hand that add up to $4.95 There are the same number of dimes and quarters but there are twice as many nickels as dimes. How many nickels are there?
Click here to see answer by richwmiller(9144)

Question 253710: Solve each system by substitution
3x+y=-8
-2x-y=6
Click here to see answer by jim_thompson5910(28715)

Question 253698: two trains leave pitsburg at the same time, one traveling east and the other traveling west. the eastbound train travels at 40miles per hour, and the westbound train travels at 30 miles per hour. let T represent the amount of time since their departure. write an equation that could be used to determine when the trains will be 245 miles apart and in how many hours will the trains be 245 miles apart?

Click here to see answer by palanisamy(496)

Question 253858: solve
{3x-4y=8
{y=x-1
Click here to see answer by jim_thompson5910(28715)

Question 253868: Suppose your class sells gift wrap for $4 per package and greeting cards for $10 per package. Your class sells 205 packages in all and receives a total of $1084. Find the number of packages of gift wrap and the number of packages of greeting cards sold.
Click here to see answer by richwmiller(9144)

Question 253900: please solve 3x+2y=20
Click here to see answer by checkley77(12569)

Question 253952: x+y-2z=0
3x+y=1
5x+3y+7z=2
x=
y=
z=
Click here to see answer by jim_thompson5910(28715)

Question 253952: x+y-2z=0
3x+y=1
5x+3y+7z=2
x=
y=
z=
Click here to see answer by dabanfield(803)

Question 253952: x+y-2z=0
3x+y=1
5x+3y+7z=2
x=
y=
z=
Click here to see answer by drk(1908)

Question 253988: 3x+4y-3z=5
x+6y+2z=3
6x+2y+3z=4
Click here to see answer by jim_thompson5910(28715)

Question 254012: a+b+c=12
a=5b
a+c=9
Click here to see answer by edjones(7569)

Question 253998: a+b+c=18
8a=b+c
a+c=11
Click here to see answer by edjones(7569)

Question 253930: Solve the equation \frac(1)(4) y - 4 = \frac(1)(8) y .
and
Solve for x:
1/4 x + 1/2 = 4(5/6 x + 1)
thanks
Click here to see answer by Alan3354(31532)

Question 254019: √x^16/√4x^8
Click here to see answer by stanbon(57967)

Question 254038: Solve by graphing. Write no solution or infinetly many solutions where appropriate.

Please and thank you.
Click here to see answer by stanbon(57967)

Question 254044: I'm sorry, you may have already seen this question, but that was because I submitted it in the wrong section.
"Use the graph to solve the linear system. Check your solution algebraically."
The intersecting point is at (6,-2)
-x+y=8
x+9=4
What do I do next? How do I check the solution?
I am in Alegbra I, second semester Honors, and I am struggling with these problems. Please help!

Click here to see answer by richwmiller(9144)

Question 254227: Hi I have this word problem I need help on figuring out the formula to use. the problem reads.
A skirt and a blouse together cost $75. The skirt costs $15 more than the blouse. What is the cost of the skirt? What is the cost of the blouse?
I would greatly appreciate your help on this problem Thank you
Scott
Click here to see answer by richwmiller(9144)

Question 254243: Go the the grocery store to purchase coke and sprite. You have $10. Coke is $1.20 each and sprite is .80. What is the linear model of the situation.
Click here to see answer by drk(1908)

Question 254314: what is the answer to (5x-6y)-(3x+9y)=
Click here to see answer by drk(1908)

Question 254330: Solve each system using substitution. Write no solution or infinitely many solutions where appropriate.

Please and Thank You!
Click here to see answer by drk(1908)

Question 254349: Solve each system using substition. Write no solution or infinitely many solutions where appropriate.

PLEASE AND THANK YOU!!
Click here to see answer by stanbon(57967)

Question 254355: how do you graph a linear equation?
Click here to see answer by Alan3354(31532)

Question 254356: Factor the expression 8x^4 - 8x^3 - 6x^2
Click here to see answer by stanbon(57967)

Question 254356: Factor the expression 8x^4 - 8x^3 - 6x^2
Click here to see answer by richwmiller(9144)

Question 254421: x-1=y+1
x+1=2(y-1)
Click here to see answer by palanisamy(496)

Question 254419: x-1=y+1
x+1=2(y-1)
Click here to see answer by richwmiller(9144)

Question 254498: A man has a collection of 29 classic cars and motorcycles. The total number of wheels for both the cars and motorcycles is 96. How many cars does this man have?
Click here to see answer by richwmiller(9144)

Question 254512: A man has a collection of 29 classic cars and motorcycles. The total number of wheels for both the cars and motorcycles is 96. How many cars does this man have? The answer is 19 cars and 10 motorcycles. What are the steps taken to solve the equation.

Click here to see answer by JimboP1977(308)

Question 254511: Snookers lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $12360?
Click here to see answer by ankor@dixie-net.com(15746)

Question 254629: x+y=10
2x=y-13
Click here to see answer by drk(1908)

Question 254689: I am trying to solve an equation using a graph. 11=4x+3 I dont understand where I need to plot the numbers. Please help..my email is carlwamt@metrocast.net
Click here to see answer by richwmiller(9144)

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