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Question 839697: A chemist needs 10 L of 21% salt solution.
The chemist has two salt solutions available
at 15% and 25% salt. Write and solve a
linear system to find the volume of each
solution that needs to be combined to make
the mixture.

Click here to see answer by josgarithmetic(39617)

Question 839718: solve each linear system using elimintion
a) 4x+5y =14
2x-3y= -2
solve using substitution
a) 3a+b-4=0
2a-10=3b
b) 3p-6q =0
4p+q=3 i keep trying and when i check its always wrong :(

Click here to see answer by LinnW(1048)

Question 839787: find the equation of the line through the point (1,-6)and which is parallel to the line 3x-y+4=0
Click here to see answer by LinnW(1048)

Question 839802: how do you solve the following:
y = 4x-8 and y = 4x+10
using the substitution method.
Click here to see answer by Fombitz(32388)

Question 839770: slope-7 through (2,-8)
Click here to see answer by Fombitz(32388)

Question 839784: find the slope of the line 2x+y-4=0
find the equation of the line through point (2,4) and which is parallel to the line 2x+y-4=0
Click here to see answer by Fombitz(32388)

Question 839877: the slope is 7 and the y-intercept is -2: what's the answer?
Click here to see answer by ewatrrr(24785)

Question 839993: Stuck on a slope question, I think it is the fractions that are messing me up. Can you help me?
Find equations of the lines that pass through the point (1, 9) and have the given slope.
Given slope = 1/3
I used y-y1=m(x-x1) for all of them and did fine, this one is giving me trouble and don't want to get marked wrong. Any help is greatly appreciated!!
Click here to see answer by richard1234(7193)

Question 840032: Determine the linear function that relates the temperature in degrees Celsius, C, to the temperature in degrees Fahrenheit, F. [Note: At sea level, water freezes at 32�F (0�C) and boils at 212�F (100�C).]
A. F=?
B. Use the above function to determine the Fahrenheit temperature corresponding to 40�C.
Any help is much appreciated!
Click here to see answer by josgarithmetic(39617)

Question 840013: Solve the system by graphing.
y=2x-2
y=-3x+3

Click here to see answer by josgarithmetic(39617)

Question 840064: A chemist measured the pressure of a gas in atmospheres at different temperatures in �C:
Temp (�C) -136 -25 0 25 100 273
Pressure(atm) 0.50 0.91 1.00 1.09 1.37 2.00
Can you predict the temperature at which the pressure would equal zero? Please explain how you got to your conclusion.
Click here to see answer by KMST(5328)

Question 840127: Find the distance between the points. Give an exact answer and an aproximation to three decimal places. (-3,-7) (-9,-12)
Click here to see answer by Fombitz(32388)

Question 840190: Graphing using slope-intercept form
1. x=2y-6=0
2. -x+y=-5
3. -3x+y=-2
4. -2x+y=0
5. x=2y-6
6. x+y=-5
7. 6x+2y=-4
8. 2y=-4x
Click here to see answer by Alan3354(69443)

Question 840194: state the radius of the circle defined by each
equation and give the coordinates of one point
on the circle.
a) x^2+y^2= 49
b) x^2+y^2= 1.44
Click here to see answer by Fombitz(32388)

Question 840199: Find an equation for the circle that is centred at the origin and
a)has a radius of 3.7
b) has a radius of sqrt 8
c) has a diameter of 18
d) passes through the point (3,5)
gracias
Click here to see answer by josgarithmetic(39617)

Question 839943: Graph the function. Y= 40x
Click here to see answer by Fombitz(32388)

Question 840202: a) Show that the point B (-3,-2) lies on the
circle defined by x^2+y^2=13.
b) Find an equation for the radius from the
origin O to point B.
c) Find an equation for the line that passes
through B and is perpendicular to OB.
Click here to see answer by Alan3354(69443)

Question 839817: slope 3/4 through (-4,4)
Click here to see answer by Fombitz(32388)

Question 840164: Determine the general equation of the scant from any point ( A,f(A) to the point on f(x)= 4^x where x=2. Describe how you would use this to find the equation of the tangent at the point (2, f(2))
Click here to see answer by richard1234(7193)

Question 840273: find the equation of a line that is perpendicular to the line y=1/4+4 and contains the points (-9,0)
y=
Can someone please help
Click here to see answer by Fombitz(32388)

Question 840277: translate into an equation.
three times jennifers age is 26 more than herberts age
Click here to see answer by Edwin McCravy(20055)

Question 840247: =-w-10
Click here to see answer by Alan3354(69443)

Question 840247: =-w-10
Click here to see answer by richard1234(7193)

Question 840385: Graph the following line 4x = 12
provide coordinates:
A (____,_____)
B (____,_____)
Click here to see answer by richard1234(7193)

Question 840415: write the equation in slope-intercept form for the line perpendicular to y=8x-9 that passes through (9,-9)
Click here to see answer by josgarithmetic(39617)

Question 840446: Given the equation xy+2y=5x+4, show that y is a function of x and determine the domain in interval notation.
Click here to see answer by josgarithmetic(39617)

Question 840453: x/3+y/5=1
Click here to see answer by jim_thompson5910(35256)

Question 840509: IF the slopes of the lines 2y-6bx = 7 & 5y+30x+13 = 0 are equal, find the value of b?.
Click here to see answer by grishma.kshatriya(27)

Question 840487: 10xy-3x^2-3y^2=13, determinate x and y
Click here to see answer by Fombitz(32388)

Question 840480: Tell whether the equation x + y = 3 is linear. Make a table of values for the
equation. Graph the points.

Click here to see answer by Fombitz(32388)

Question 840564: Determine the slope of the line passing through the points (7,-1) (-6,5).
Click here to see answer by Fombitz(32388)

Question 840564: Determine the slope of the line passing through the points (7,-1) (-6,5).
Click here to see answer by ewatrrr(24785)

Question 840564: Determine the slope of the line passing through the points (7,-1) (-6,5).
Click here to see answer by stanbon(75887)

Question 840573: Suppose you are given the coordinates of the vertices of TRIANGLE GHI. Which of the following pieces of information will help you determine the equation of the median from H?
a) The coordinates of H and the length of GI
b) The slope of GI and the coordinates of H
c) the midpoint,M, of GI and the slope of HM
d) the length of GH and the slope of HI.
Click here to see answer by jim_thompson5910(35256)

Question 840530: Find and equation of the line satisfying the given condition :
- Through the two points (-1,-5) and (3,6)
Click here to see answer by jim_thompson5910(35256)

Question 840578: which of the following is true?
a) A line segment is the part of the line between two specific points, not including the points themselves.
b) The slope of a line segment is the same as the slope of the line containing the line segment.
c) Parallel line segments have slopes that are opposite in sign.
d) Perpendicular lines have the same slope.
Click here to see answer by jim_thompson5910(35256)

Question 840447: For f(x)=-2x^2+3x+1 find f(2+h)-f(2)/ (divded by) h
Click here to see answer by Fombitz(32388)

Question 840500: the tens digit of a two digit number is half of the units digit. when the digits are reversed the number is increased by 36 find the number
Click here to see answer by LinnW(1048)

Question 840591: simplify and solve the system using elimination
2(x-4) +3(y+2) =-8
4(x+1) +5(y-1)= -9
Click here to see answer by Edwin McCravy(20055)

Question 840574: Suppose you are given the coordinates of the vertices of TRIANGLE ABC. Which of the following pieces of information will help you determine the equation of the altitude from A?
a) The coordinates of A and the negative reciprocal of the slope BC
b) The negative reciprocal of the slope AB
c) the midpoint of BC and the coordinates of A
d) the length of AB and the slope of AC.
Click here to see answer by Edwin McCravy(20055)

Question 840681: A chemist needs 10 L of 21% salt solution.
The chemist has two salt solutions available
at 15% and 25% salt. Write and solve a
linear system to find the volume of each
solution that needs to be combined to make
the mixture.

Click here to see answer by ewatrrr(24785)

Question 840765: How do you use systems of equations to solve the question Randy has some $1 bills and $5 bills in his wallet. He has 15 bills in all. He counts the money and finds he has $47. How many of each type of bill does Randy have?
Click here to see answer by josmiceli(19441)

Question 840791: Give the slope and the y intercept of the line -10x-2y=6

Click here to see answer by Fombitz(32388)

Question 840814: x - 10 = -6x + 10
Solution: x = 12
Please post your question completely .
Is it solve for x or check the solution x = 12
I am answering it for the solve for x .

Click here to see answer by grishma.kshatriya(27)

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