Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

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Question 177974: Solve each system by the addition method.
3/7x+5/9y=27
1/9x+2/7y=7
Thanx
Click here to see answer by jim_thompson5910(35256)

Question 178045: How do you find intercepts of a line in an equation such as y = -3x - 20
Click here to see answer by HyperBrain(694)

Question 178053: 2y=x+30
Click here to see answer by Mathtut(3670)

Question 178051: Find and interpret the C intercept for the line. C=2.85n + 30.52
Click here to see answer by Mathtut(3670)

Question 178113: I am in desperate...I can do these problems until I get to the answer and I miss every time, so could someone please give me step by step.
Find an equation of the line containing the given pair of points
(-2, -3) and (-8, -4)

THANKS!

Click here to see answer by nerdybill(7384)

Question 178144: 2x+3y=9 solve for y (can you explain step for step please)
Click here to see answer by jim_thompson5910(35256)

Question 178179: I replaced the numbers in this equation so I can solve my own numbers. Could someone please help me.
The medium age of first marriage is 24.5 years in 1995 to 25.1 years in 2000. Let 1995 be year 5 and 2000 be year 10.
a) Find the equation of the line through (5,24.5)and (10, 25.1).
b) What do x and y represent in your equation?
c) Interpret the slope of this line.
d) In what year will the medium age be 30?
I want to compare what I have in my problem so please show work. Thank you.
Click here to see answer by stanbon(75887)

Question 178181: I need help with this problem.
The percentage of workers with direct deposits. 32% in 1994 to 60% in 2004. Let 1994 be year 0 and 2004 be year 10.
a) Write the equation of the line through (0,32) and ( 10,60) to model the growth of direct deposit.
ok I got y= 14/5 or 2.8x+b. Did I do something wrong.
b) Using this equation, what will the year be when 100% of employees will use direct deposit. I got 2017. Please show your work. So I can see where I went wrong?
Click here to see answer by josmiceli(19441)

Question 178212: if i have the coordinates of a slope (-3,7)and (5,-1) how do i find the line of equation with the points
Click here to see answer by stanbon(75887)

Question 178212: if i have the coordinates of a slope (-3,7)and (5,-1) how do i find the line of equation with the points
Click here to see answer by nerdybill(7384)

Question 178219: What is the equation the y-axis?
Click here to see answer by stanbon(75887)

Question 178218: If M(-2,2) is the midpoint of segment PQ and the coordinates of P are (-9,7), find the coordinates of Q?
Click here to see answer by stanbon(75887)

Question 178269: following the guidelines of the Food and Drug Administration, Dale tries to eat at least 5 servings of fruit each day. For the first six days of one week, she had 5,5,3,5,4, and 5 servings. How many servings of fruit should Dale eat on Saturday to average at least 5 servings per day for the week?
Click here to see answer by EMStelley(208)

Question 178321: y= 3x+5
Click here to see answer by Alan3354(69443)

Question 178321: y= 3x+5
Click here to see answer by cartert(27)

Question 178329: 1. Find the equation of a straight line that passes through a point (�1,3) such that it is perpendicular to straight line y - 2x = 5.
2. Sketch a graph for a quadratic function given as below:
f (x) = x� - x - 6

Click here to see answer by jojo14344(1513)

Question 178274: If there are 12 volunteers and 8 pizzas haw many pizzas would each volunteer get?
Click here to see answer by cartert(27)

Question 178346: The sum of three consecutive integers is 114. Find the largest of these integers.
Click here to see answer by Mathtut(3670)

Question 178348: The sum of three consecutive integers is 114. Find the largest of these integers.
Click here to see answer by Mathtut(3670)

Question 178348: The sum of three consecutive integers is 114. Find the largest of these integers.
Click here to see answer by Alan3354(69443)

Question 178289: Please can you help me with this algrebra question.
Simplify the following; [-X]X[-2Y]X[-3Z]
My answer was 6x, but I was told it was the wrong answer.
Click here to see answer by mial_ibanez22(3)

Question 178394: 3X/3=2X/3+1
Click here to see answer by jim_thompson5910(35256)

Question 178409: Determine the intercepts of 6x+9y=18
please show work thanks

Click here to see answer by jim_thompson5910(35256)

Question 178435: Find the domain and range for the follow functiosn without using a calculator.
1.)
2.) x/x-1
Click here to see answer by user_dude2008(1862)

Question 178446: Write the equation of a line perpendicular to 7x +8y-12=0,which passes through the point (-2,5)
Click here to see answer by nerdybill(7384)

Question 178391: 1.ELECTRICIAN CHARGED MARY $29.96 FOR A SERVICE CALL PLUS $39.96 PER HOUR FOR A TOTAL OF $169.82 FOR INSTALLING HER LIGHT. HOW MANY HOURS HE SPENT INSTALLING THE LIGHT?
2.JOHN PLANS A ROAD TRIP FROM NEW YORK TO WASHINGTON IN HIS TOYOTA.HE STAYED OVERNIGHT IN NEW JERSEY. ON WEDNESDAY, HE DROVE FROM NEW YORK TO NEW JERSEY AT AN AVERAGE SPEED OF 47 mph. HIS DRIVING TIME ON THURSDAY IS 2 HOURS LONGER THAN HIS DRIVING TIME ON WEDNESDAY. IF THE TOTAL DISTANCE FROM NEW YORK TO NEW JERSEY IS 326 MILES, THEN WHAT IS THE TOTAL NUMBER OF HOURS HE DROVE ON BOTH DAYS?
HOW FAR IS NEW YORK FROM NEW JERSEY?

Click here to see answer by cartert(27)

Question 178461: write the equation of a line parallel to x+2y=7.which passes through the point(-5,-4)
the answer I came up with was y=-1/2x-13/2 is this correct?
Click here to see answer by stanbon(75887)

Question 178263: Graph the line
y = 3x+1 using two orderd pairs.
Now from your graph what is the x-value on the line when y = 8?
What is the exact value of x when y = 8 on your line using algebra to solve for it?

Click here to see answer by cartert(27)

Question 178504: I am not sure where to start with this one.
Graph 2x+5y-2>3y-10+2x
Click here to see answer by stanbon(75887)

Question 178445: Studies have shown that the population of rats inside an average sized house grows exponentially depending upon the number of cats that can be found on the premises. A a function of time the population of rats is approximated by the equation:
p(t)=P(K/C)^t
Where K=4.2 is a constant derived from experiment P is the initial popuation of rats, C is the number of cats, and t is given in weeks.
How many cats are necessary to stop the number of rats from increasing? Explain.
Click here to see answer by stanbon(75887)

Question 178533: 5x-3(2x-7)=11x+3
Click here to see answer by jojo14344(1513)

Question 178535: Tickets to a concert cost $25 for lower-level seats and $10 for upper-level seats.
A company plans to buy up to 30 tickets for employees and spend up to $500. Write
and graph a system of linear inequalities to represent all the possible combinations of lower-level and upper-level tickets the company can buy.
I got: x + y is less than or equal to 30
25x + 10y is less than or equal to 500
my problem: I don't know where to go from here to graph.
PLEASE HELP!
Click here to see answer by stanbon(75887)

Question 178537: COULD YOU PLEASE HELP ME SOLVE THIS EQUATION FOR Y. I have tried and I am still not getting anythere with it. Thank you.
1/2(4X -6) = 2/3(6X -9)+3
Click here to see answer by Alan3354(69443)

Question 178539: How do you solve this inequality and show the answer on the number line?
1. -2<3x+1<11
2. -3< (2x- 1)/3<7
I am getting somewhat confused with my formula. Help , I am desperate. Thank you.
Click here to see answer by solver91311(24713)

Question 178534: Graph y=(1/3)^x. Identify the domain, asymptote, and range.
Did I do this right?
x=3 -2 -1 0 1 2 3
y=27 9 3 1 1/3 1/9 1/27
Domain=all real #s
asymptote=y=0
Range=all positive real #s
Click here to see answer by jim_thompson5910(35256)

Question 178444: please help me with this solution. I am not getting the right answer.
John plans a road trip from Chicago to Detroit in his Toyota with an overnight stay in Hammond,Indiana. On Wednesday, he drove from Chicago to Hammond to Detroit at an average speed of 69 mph. His driving time on Thursday is 2 hours longer than his driving time on Wednesday. If the total distance from Chicago to Detroit is 326 miles, then what is the total number of hours he drove on both days? How far is Detroit from Hammond?
Thank you.
Click here to see answer by Mathtut(3670)

Question 178552: Write a system of two equations in two unknowns for each problem. Solve each system by the metheod of your choice.
Ziggy's Famous Yogurt blends regular yogurt that is 3% fat with its no-fat yogurt to obtain lowfat yogurt that is 1% fat. How many pounds of regular yogurt and how many pounds of no-fat yogurt should be mixed to obtain 60 pounds of low-fat yogurt?
Click here to see answer by Mathtut(3670)

Question 178328: From a base elevation of 7200 ft, a mountain peak in Colorado rises to a summit elevation of 14598 ft over a horizontal distance of 15848 ft find the grade of the peak?
Click here to see answer by ankor@dixie-net.com(22740)

Question 178591: help! i dont understand this problem...i know what real and imaginary numbers are but this one really confused me! thanks!
Find the real and imaginary parts of the complex number.
-8/9 i
1 ___ (real part)
2 ___(imaginary part)

Click here to see answer by cartert(27)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 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