Questions on Algebra: Graphs, graphing equations and inequalities answered by real tutors!

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Question 1163631: May someone please help me on this question? I just don't understand why it's C (or is it not C and if so what is it)?
Thank you so much!
https://postimg.cc/4mSMW6Pq

Click here to see answer by solver91311(24713)

Question 1163694: if f(x) = x^n, ( n belong to R) prove that
f’(x) = n x^(n-1)

Click here to see answer by ikleyn(52778)

Question 1163843: Find the slope of the line that passes through the given points, if possible. (If an answer is undefined, enter UNDEFINED.)
(−5, −8), (3, 8)
Click here to see answer by solver91311(24713)

Question 1163855: A party planner charges $5,875 for a formal party for 100 people and $3,125 for 50 people.
Write an equation modeling this data. (Let x represent the number of people, and let y represent the total charge in dollars.)
Click here to see answer by solver91311(24713)

Question 1163912: Hi!
How many miles did the car trave totally?
I got 120 and 205 and I don't know which one is correct.
Thanks!
https://postimg.cc/MvrDfBVb

Click here to see answer by greenestamps(13198)

Question 1163958: graph h(x) =
−1/2x x < 0
x^2−1 x ≥ 0
Click here to see answer by solver91311(24713)

Question 1163960: how to graph h(x) =
−1/2x x < 0
x^2−1 x ≥ 0
Click here to see answer by Alan3354(69443)

Question 1163990: Find a linear inequality with the following solution set. Each grid line represents one unit.
Image: https://latex.artofproblemsolving.com/4/8/2/48234b947b623e95b3f920ee2e9ce6cb24dcfa4b.png
(Give your answer in the form ax+by+c>0 or ax+by+c>=0 where a,b, and c are integers with no common factor greater than 1.)

Click here to see answer by solver91311(24713)

Question 1164007: Find the coefficient of y^4 in the expansion of (2y - 5)^7.
I first answer was 70000, but it was incorrect.
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Question 1164035: Find the value of $B - A$ if the graph of $Ax + By = 3$ passes through the point $(-7,2),$ and is parallel to the graph of $x + 3y = -5.$
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Question 1164191: what is the graph of x<3 domain and -4
Click here to see answer by greenestamps(13198)

Question 1164191: what is the graph of x<3 domain and -4
Click here to see answer by ikleyn(52778)

Question 1164395: graph y=-5x+2
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Question 1164395: graph y=-5x+2
Click here to see answer by josgarithmetic(39617)

Question 1164413: The salaries of the President and Vice President of a certain country total $552,400 a year. If the President makes $247,600 more than the Vice President, find each of their salaries.
Click here to see answer by ikleyn(52778)

Question 1164448: Peter invested some money at 6% annual interest, and Martha invested some at 12%. If their combined investment was $6,000 and their combined interest was $510, how much money did Martha invest?
Click here to see answer by ikleyn(52778)

Question 1164452: Use two equations in two variables to solve the application.
Two pairs of shoes and four pairs of socks cost $103, and three pairs of shoes and five pairs of socks cost $150. Find the cost of a pair of socks.
Click here to see answer by Alan3354(69443)

Question 1164451: A merchant wants to mix peanuts worth $3 per pound with jelly beans worth $1.50 per pound to make 40 pounds of a mixture worth $2.10 per pound. How many pounds of each should he use?
Click here to see answer by Alan3354(69443)

Question 1164450: A chemist has one solution that is 60% alcohol and another that is 35% alcohol. How much of each must she use to make 15 liters of a solution that is 55% alcohol?
Click here to see answer by Alan3354(69443)

Question 1164501: Solve each of the following compound inequalities. Graph the solution and write the
solution set in interval notation.
𝑥 + 5 ≤ −2 𝑜𝑟 𝑥 + 5 ≥ 2
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Question 1164510: Graph the line y=2x-6
Click here to see answer by Alan3354(69443)

Question 1164604: x+2y=4

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Question 1164680: Find an equation whose graph has the given slope and y-Intercept.
Slope -3/4; y-intercept 2.
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Question 1164685: maximize P = 6x = 3y
subject to:
material 20x + 5y <= 600lbs.
machinery 25x + 20y <= 1000 hrs
labor 20x + 30y <= 1200hrs
x, y > 0
Click here to see answer by greenestamps(13198)

Question 1164776: Draw the area of solution for the following inequality system on
Cartesian chart
2x + y ≥ 4
3x + 4y ≤ 12
x ≥ 0
y ≥ 0
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Question 1164786: I am trying to graph 3y= -5x, I tried by substituting x for 0 then y for 0. I ended up somehow getting 0,1/3. I just tried again and I was able to get 0,-3. I have looked it up to see if i was right or not because I wasn't sure and it did something completely different. So now im all messed up and I have no idea if what I am trying is the right thing, can you help?
Click here to see answer by josgarithmetic(39617)

Question 1164862: If a line contains the point (0, -1) and has a slope of 2, then which of the following points also lies on the line?
A) (0,1)
B) (1,1)
C) (2,1)
Click here to see answer by Boreal(15235)

Question 1164893: graph the equation 7x-4y=28

Click here to see answer by Alan3354(69443)

Question 1165043: Y=x+2
Click here to see answer by josgarithmetic(39617)

Question 1165061: Find the gradient between the points (5, -1) and (3, 5)
Click here to see answer by Edwin McCravy(20054)

Question 1165121: I am trying to graph a line with slope 8 and y-intercept -8
Click here to see answer by Edwin McCravy(20054)

Question 1165121: I am trying to graph a line with slope 8 and y-intercept -8
Click here to see answer by josgarithmetic(39617)

Question 1165158: how do I graph g(x)=(x+2)^2 -3 using transformations of x^2
Click here to see answer by josgarithmetic(39617)

Question 1165168: https://answers.yahoo.com/question/index?qid=20200917233907AAlD881
Can you help me determine g(x)
Click here to see answer by greenestamps(13198)

Question 1165168: https://answers.yahoo.com/question/index?qid=20200917233907AAlD881
Can you help me determine g(x)
Click here to see answer by solver91311(24713)

Question 1165167: Help me sketch a graph please
https://answers.yahoo.com/question/index?qid=20200917233932AA5syZB
Click here to see answer by solver91311(24713)

Question 1165184: Suppose that the function h is defined, for all real numbers, as follows.

h(x)= -1 if x<0
2 if x=0
-2 if x>0
Graph the function h.
Click here to see answer by Seutip(231)

Question 1165236: Suppose that the function f is defined for all real numbers as follows.
f(x)= x^(2)+1 if x<1
2 if x=1
8-3x if x>1
Graph the function f. Then determine whether or not the function is continuous.
Click here to see answer by ikleyn(52778)

Question 1165237: Suppose that the function f is defined for all real numbers as follows.
f(x)= 6 if x<-4
-10+x^(2) if -4<=x<4
2x-2 if x>=4
Graph the function f. Then determine whether or not the function is continuous.
Click here to see answer by solver91311(24713)

Question 1165263: I don´t understand... :(
Suppose that the function f is defined for all real numbers as follows.
f(x)= x^(2)+1 if x<1
2 if x=1
8-3x if x>1
Graph the function f. Then determine whether or not the function is continuous.
Click here to see answer by solver91311(24713)

Question 1165338: Please help me solve this , represent the rational function f(x)=x2-3x-10/x using a table of values. Plot the points given in the table of values and sketch a graph by connecting the points.
Click here to see answer by ikleyn(52778)

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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11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 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23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975