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

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Question 115097This question is from textbook Introductory Algebra
: Graph an Equation of the form Ax + By = C

3x + y = 3This question is from textbook Introductory Algebra

Click here to see answer by checkley71(8405)

Question 115283: x=3y+7
x+y=-5
Click here to see answer by jim_thompson5910(13787)

Question 115285: 5x-4y=1
3x-6y=6
Click here to see answer by jim_thompson5910(13787)

Question 115292: Please help.
Solve the system by substitution.
3x - y = -7
x + y = -9
Thanks
JMS
Click here to see answer by solver91311(5072)

Question 115311: Two angles are complimentary to each other. Twice one angle is equal to the other angle plus the product of three and five.
Set up a system of linear equations to represent the two angles. (you will need two equations and two unknowns)
Graph each of the equations on one rectangular coordinate system.
What do you notice about the intersection of the two lines?

Click here to see answer by stanbon(26259)

Question 115322: can someone help me solve this problem?
1. consider the function f(x)=x^2 + 6x - 2
A. find h, the x-coordinate of the vertex of this parabola.
answer_______________________________________________
B. Substitute the two whole number values immediately to the left and right of h into the function to find the cooresponding y. Fill in the table below. Make sure your x-values are in increasing order in your table.
x y
__h=___ ________
_____ ________
_____ ________
_____ ________
_____ ________
C. Use microsoft exel to graph the function by plotting the points found in the table in part B.
need help ASAP
THANKS

Click here to see answer by scott8148(3382)

Question 115151This question is from textbook
: Julio Mendez is a carpenter. He is building a staircase between the first and second floors of a house, a height of 9 feet. The tread, or depth of each step, must be 10 inches. The slope of the staircase cannot exceed 3/4. What is the measure of the riser, or height of each step?This question is from textbook

Click here to see answer by checkley71(8405)

Question 115147This question is from textbook
: Julio Mendez is a carpenter. He is building a staircase between the first and second floors of a house, a height of 9 feet. The tread, or depth of each step, must be 10 inches. The slope of the staircase cannot exceed 3/4. How many steps should he plan?This question is from textbook

Click here to see answer by checkley71(8405)

Question 115360: what would the answer be for
given f (x) 5^2-2x+1 find f (-2)
Click here to see answer by stanbon(26259)

Question 115361: rewrite 2x-3y=-6 as a function of f (x)
Click here to see answer by stanbon(26259)

Question 115527: Given the following inequalities which point is located in the shaded area
y+1<-x
Y>1
The points are....
5,0
-1,2
-3,7
-4,2
Click here to see answer by stanbon(26259)

Question 115529: Given the following inequalities which point is located in shaded area?
x-2y>6
x+4y<-4
The points are....
3,-1
3,-5
-4,-3
0,-1
The answer I came up with was 3,-5 is this correct?
Click here to see answer by stanbon(26259)

Question 115525: Given the following inequalities which point is located in the shaded area
y<2x-3 (the < is underlined)
y<-1/2+2 (the < is underlined)
the points are...
-5,-2
2,6
3,-4
5,3
The answer I am coming up with is -5,-2 is this correct?
I am kinda confused on exactly how to do system of inequalities, I really appreicate your help!!
Click here to see answer by stanbon(26259)

Question 115592: solve for x
ax+b=b
Click here to see answer by tutorcecilia(2042)

Question 115597: 2x/3 - 2< or equal to 8 - x
Click here to see answer by jim_thompson5910(13787)

Question 115715: solve for x: X + 3(4x-5) = 5 -(2x-4)
Click here to see answer by jim_thompson5910(13787)

Question 115740: The length of a rectangle is 7 less than twice the width. the perimeter is 61. Find the dimensions.
Click here to see answer by checkley71(8405)

Question 115716: The length of a rectangle is 7 less than twice the width. the perimeter is 61. find the dimensions.
Click here to see answer by checkley71(8405)

Question 115866:
please help me solve this equation: 3x^2-x-2
Click here to see answer by checkley71(8405)

Question 115723: Hi! I need help solving the following equation.
2x+y=10
x^2+y^2=25
Thanks so much
Click here to see answer by ankor@dixie-net.com(6691)

Question 116009: CAN SOMEONE HELP ME SOLVE THIS GRAPHING?
1. DESCRIBE THE TRANSFORMATIONSON ON A GRAPH OF f(x)=e^x. State the placement of the horizonal asympotote and y-intercept after the transformation. For example,"left 1" or "rotated about the y-axis" are descriptions
a) g(x)=e^x+3
description of transformation:
Horizonal asymptote:
y-intercept in (x,y) form:
b)H(x)=e^-x
description of transformation:
Horizonal asymptote:
y-intercept in (x,y)form

Click here to see answer by jim_thompson5910(13787)

Question 116221: Please help.
Solve the system by addition.
5x-3y=13
4x-3y=11
Thanks
JMS

Click here to see answer by bucky(1732)

Question 116371: 2(x+3)-3(x-2)=3x+6
Click here to see answer by MathLover1(1183)

Question 116373: solve for y: -4x + 2y = -12
Click here to see answer by MathLover1(1183)

Question 116381: Find two consecutive odd integers such that three times the second is twelve more than the first.
Click here to see answer by MathLover1(1183)

Question 116367: 3(x-2)=-12
Click here to see answer by edjones(3291)

Question 116401:
how do u find the slope of two points given?
Click here to see answer by checkley71(8405)

Question 116401:
how do u find the slope of two points given?
Click here to see answer by mpowell31(2)

Question 116384: A girl is selling homemade cookies for $.75 a piece. She spent $3 on posters to advertise her cookies. How many cookies must she sell so that her profit is at least $25?
Click here to see answer by heidi(17)

Question 116382:
The length of a rectangle is 7 less than 3 times the width. If the perimeter is 34, find the dimensions.
Click here to see answer by checkley71(8405)

Question 116704: 7(3-x)+1=5x-2
21-7x+1=5x-2
24=12x
24/12=2
12x/12=x
x=2
Click here to see answer by samgagner18(1)

Question 116708: 7-3x>or equal to x-5
Click here to see answer by jim_thompson5910(13787)

Question 116702: -2(x-7)=4x+10
Click here to see answer by jim_thompson5910(13787)

Question 116705: 2x+5>1
Click here to see answer by jim_thompson5910(13787)

Question 116940:
1,000 (3,500) + 200 (0) + 1,900 (85% P) + 100 (P) = 11,100,000
Click here to see answer by checkley71(8405)

Question 117148: use the point-slope form of the linear equation to find an equation of the line the given point. Then write the equation in standard form.
Slope -5/8;through (2,5)
Click here to see answer by jim_thompson5910(13787)

Question 117267: find the f(-1) for the following equation
f(x)=-2x3+4x2-6x+9
the 3 and the 2 are powers of 3 and 2
Click here to see answer by jim_thompson5910(13787)

Question 117266:
Thw equation y=0.10x +200 describes the award money in a recycling contest. What are the slope and the y-intercept for this equation.
Click here to see answer by checkley71(8405)

Question 117265: Adult tickets for a play cost $11 and child tickets cost $10. If there were 23 people at a perfromance and the theater collected $246 from tickets sales, how mant childern attended the play?
Click here to see answer by checkley71(8405)

Question 117264:
The length of a rectangle is 3 m more than twice its width, IF the perimeter of the rectangle is 42 m, find the dimensions of the rectangle.
Click here to see answer by checkley71(8405)

Question 117263:
A Chemist ahs 25% and a 50% acid soultion. How much of each soultion should be used to form 200 ml of a 35% acid soultion.
Click here to see answer by checkley71(8405)

Question 117262: 5x+7y=b
mx+y=22
Find the vaule of m and b in the following systems so that the soultion to the system is (-3,4).
Click here to see answer by edjones(3291)

Question 117408: An 18-ft board is cut into two piece, one of which is 4 ft longer that the other. HOw long is each piece?
Click here to see answer by edjones(3291)

Question 117403: Carla invested $28,000, part at 14% and part 9%. IF the total interest at the end of the year is $3,370, how much did she invest at 14%?
Click here to see answer by edjones(3291)

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