Questions on Word Problems: Evaluation, Substitution answered by real tutors!

Tutors Answer Your Questions about Evaluation Word Problems (FREE)

Question 410339: one pipe can fill a tank in 3 minutes and a second pipe can fill the same tank in 7 minutes. how long will it take the two pipes to fill up this tank together?
Click here to see answer by josmiceli(19441)

Question 410534: Working on equations, and just want to make sure I have done my steps correctly in figuring if this equation represents a linear, quadratic, or exponential function.
x^2 - 7 = -4 x ( I think it is a Quadratic)

Thanks :o)
Click here to see answer by richard1234(7193)

Question 410536: Can you help and show me if I have done this problem correctly. Williamston Daily a daily newspaper. When they first started printing three years ago they had 6000 home delivery subscribers. The number of subscribers increases by 69 every month. Write an equation that shows the relationship between the number of subscribers, B, and the number of months the paper has been printed, n.
I think you would write this like, B = 6000n + 69 am I correct or not.
Thanks :o)
Click here to see answer by Theo(13342)

Question 410532: Hi I am trying to make sure I have done the steps correctly with this problem and just need to know if I am right whether or not this equation represents a linear, quadratic or exponential function.
y = 10x - 3 - 12x (I think it is a Linear)
Thanks :o)
Click here to see answer by Theo(13342)

Question 410631: A swimming pool area has a 5-foot wide concrete path all around it. The width of the pool is half of the length. The area of the pool and path together is 1,000 square feet. What is the total area of the concrete path.
Click here to see answer by ankor@dixie-net.com(22740)

Question 410721: Okay I need some help with making sure I know how to read this table correctly. This table gives for a particular object, the acceleration A caused by an applied force F. I am not sure what the acceleration of the given object if the applied force is 145.

Acceleration (A) 10 15 20 25 30
..........Force (F) 50 75 100 125 150
How would I figure this?
Thanks for your help :o)
Click here to see answer by Alan3354(69443)

Question 410531: Hi Just need some help with understanding this problem better, I think I know how to do this but I am not sure if I have worked it correctly.
Is this equation representing a linear, quadratic or exponential function?
y = 4^-x
Thanks for your help :o)
Click here to see answer by ankor@dixie-net.com(22740)

Question 410977: Please find the area of a rectangle whose length is 21 cm and whose perimeter is 90 cm.
Click here to see answer by dudeantariksh(10)

Question 411009: Need your help please if that is okay I am trying to figure out without graphing, to identify the slope and the y-intercept.
y = -1/2x + 2
Would it be Slope -1/2;y-intercept (0,2)
Thanks for your help :o)
Click here to see answer by richard1234(7193)

Question 411012: Hi I need some help with finding the other endpoint of a line segment with the given midpoint and one endpoint.
Endpoint: (0,0); Midpoint: (-4,10)
I am thinking it is (-20,8) but I am not sure.
thanks :o)
Click here to see answer by ewatrrr(24785)

Question 411011: Hi need some help with this problem, little bit confused.
I am to determine if the relationship represented in the table is linear. If it is linear, how would I write an equation?
x | 10 | 15 | 20 | 25 | 30 | 35 |
y | 10 | 20 | 30 | 40 | 40 | 50 |
I believe this is not a linear but if not how would I know.
Some of the choice I am looking at if it is linear would any of these fit.
y = 15x + 10
y = 10x + 20
y = 20x + 10
Thanks a bunch :o)
Click here to see answer by ewatrrr(24785)

Question 410145: 168 pieces of fruit 1/3 are not necturines what is the equation to figure how many are not necturines?
Click here to see answer by ewatrrr(24785)

Question 409096: Trevor launched a rocket in the soccer field. it landed 22 feet above the ground in a tree. if the rocket and trevor are 25 feet apart, what is the distance between trevor and the tree?
Click here to see answer by ewatrrr(24785)

Question 411174: I am having a hard time figuring out this problem can you help me understand it better.
I need to figure out the surface area of the solid right circular cylinder with
r = 9cm and h = 7cm
Would my surface area be 904.3cm^2
Thanks :o)
Click here to see answer by stanbon(75887)

Question 411157: I need some help with understanding how to use patterns or a linear equation to complete this table, would you be able to help me out and show me what I am doing wrong.
X , Y
1 , 1
3 , 7
5 , 13
10 , ?
50 , ?
100 , ?
I am not sure how to figure the "?" out.
Thanks :o)
Click here to see answer by stanbon(75887)

Question 411240: This is for a statistics class.
On an exam with a mean of M=82, you obtain a score of X=86.
a. Would you prefer a standard deviation of s=2 or s=10? (Hint: Sketch each distribution and find the location of your score.)
b. If your score were X=78, would you prefer s=2 or s=10?
c. Explain your answers.
Click here to see answer by ewatrrr(24785)

Question 411776: I need to solve the problem using 3.14 as an approximation for pie where appropriate. The Great Pyramid of Giza was built around the year 2560BC. It was originally 481 feet high with a square base measuring 751 feet on each side. Its slant height was 611 ft. Find the volume of the Great Pyramid. Round the answer to a four significant digits.
I see the V= (751 x 751) x 481 and them divide the answer by 3 but I guess I am not understanding where 3.14 comes in.
Thanks for the help :o)
Click here to see answer by richard1234(7193)

Question 411881: How many liters of 25 percent salt solution must be added to 20 liters of a 12 percennt solution to make a solution that is 20 percent salt?
Click here to see answer by mananth(16946)

Question 411855: On a certain river, a motoboat can travel 34 miles per hour with the current and 28 miles per hour against the current. Find the speed of the motorboat in still water and the speed of the current.
Click here to see answer by mananth(16946)

Question 412074: a plane flies at 230 km/h, how far will it go in 1 1/2 hours?
Click here to see answer by stanbon(75887)

Question 412202: if i traveled 3 hours at an average rate of 60mph. due to traffic it took me 5 hours hours at an average rate of 36mph. what is my average of my entire trip
Click here to see answer by njusa(12)

Question 412253: "A baseball team played 5 more games this season than last season. Last season, the team won 60% of their games, and this season it won 55% of their games. The team won the same number of games this season as last season. Find the number of games played each season."
I AM NOT SURE HOW TO GO ABOUT SOLVING THIS...IS THERE A FORMULA TO FOLLOW? THANKS TONS!
Click here to see answer by stanbon(75887)

Question 412645: Ellen invested $9000, part at three percent per year and the rest at 5percent per year. After one year the total interest from these investments was $354. How much did she invest at each rate?
I have been looking at this for over an hour andnim not sure even how to start it.. Thank you so much!!
Click here to see answer by rfer(16322)

Question 412714: two cyclists start out at the same time and travel towards each other from points that are 210 miles apart. The frst cyclist travels at an average speed of 31 miles per hour, and the second travles at an averag espeed of 39 miles an hour. After how many hours will they meet?
Click here to see answer by checkley79(3341)

Question 412766: x^(5)=137
Click here to see answer by solver91311(24713)

Question 412980: I meant I need help completing the square
6x^2+5x=6
Click here to see answer by josmiceli(19441)

Question 413379: find the distance if speed = 64km/h and time = 3.5
Click here to see answer by algebrahouse.com(1659)

Question 413391: a car completes a 180 mile journey traveling at an average speed of 45 miles per hour. work out the time taken.
Click here to see answer by rfer(16322)

Question 413394: hector cycles at an average speed of 18 mph if it takes 3.5 hours to reach his destination, how far does he travel?
Click here to see answer by rfer(16322)

Question 413416: An investment of $1500 paid interest of $45 during a certain period. How much interest would an investment of $2000 invested at the same rate for the same length of time pay?
This is how I set up my problem.
1500/45=2000/x
1500x=2000*45
1500x=90000
x=60
Is this correct?
Thank you very much.
Click here to see answer by sudhanshu_kmr(1152)

Question 413512: the unit rate of 80 feet/20 seconds is ?
Click here to see answer by Alan3354(69443)

Question 413536: Include your work by showing the steps you took to solve it or explain in words what you did for the problem.
Solve the following problem:
hint( If consecutive integers are defined as n,n+1, etc. how could you find EVEN integers be defined)
Problem:
The sum of four consecutive EVEN integers is 308. write and solve an equation to find four integer's.

note; im in cyber school and this is the third time ive got this problem wrong. and the first time i turned to this site. their answer was wrong. Can someone please help me.
Thankyou,
Ashley
Click here to see answer by sudhanshu_kmr(1152)

Question 413545: Here's another one!
Tell what you must do to the inequality, then SOlve.
4J+5≥23+3J
your answer should be: J ≥ 18
thanks
Click here to see answer by richard1234(7193)

Question 413541: Again , third time im subbmitting this question. Guys if you dont know it please dont send it to me, cause i keep getting it wrong. I appreciate the effort. /:
Solve the following inequality:
2< - 8s
Her comments back to me is :
"You've missed the applying one rule that is different for solving inequalities from solving equations"
thankyou, hope you get to it fast.
Click here to see answer by jim_thompson5910(35256)

Question 414304: Please help me solve this problem:
If you earn $3,000 over 10 years on an investment that pays 5% compounded annually, what was the principle amount you started with?

Click here to see answer by ewatrrr(24785)

Question 414307: Please help me solve this problem:
How much interest does a $10,000 investment earn at 6% over 15 years compounded quarterly?
Click here to see answer by ewatrrr(24785)

Question 414521: If 4, 5, and 7 are factors of a number, list 4 other numbers that would also be factors of the number.
Click here to see answer by josmiceli(19441)

Question 414656: when you reverse the digits in a certain two-digit number you decrease its value by 36. what is the number if the sum of its digits is 10.
i don't know how to set the equation up.
if you could that would be great! :)
Click here to see answer by ewatrrr(24785)

Question 414662: the sum of the digits in a certain two-digit number is 12. when you reverse its digits you increase the number by 18. what is the number?
Click here to see answer by ewatrrr(24785)

Question 414654: A plane traveled 480 miles to Lisbon and back. the trip was with wind. it took 4 hours. the trip back was into the air. the trip back took 8 hours. find the speed of the plane in still air and the speed of the wind.
so far..i divided 480/4 = 120 (wind) and i divided 480/8 = 60 (air)
but i don't know how to set the equation up.
if you could that would be great! :)
Click here to see answer by ewatrrr(24785)

Question 414660: A plane traveled 756 miles to Shanghai and back. the trip was with wind. it took 9 hours. the trip back was into the air. the trip back took 18 hours. find the speed of the plane in still air and the speed of the wind.
so far..i divided 756/9 = 84 (wind) and i divided 756/18 = 42(air)
but i don't know how to set the equation up.
if you could that would be great! :)
Click here to see answer by josmiceli(19441)

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, 3871..3915