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

Tutors Answer Your Questions about Evaluation Word Problems (FREE)

Question 472420: Find slope of line that passes through the points (2, -5) and (3,4)

Click here to see answer by ewatrrr(24785)

Question 472423: ( -1) - (7 - 2 x ( -1))

Click here to see answer by jorel1380(3719)

Question 472427: Evaluate the variable expression when a = - 2, b = 3, and c = 4.
2( b + c ) - 3a

Click here to see answer by MathLover1(20849)

Question 472426: Write the equation of the line on the plane that has an y-intercept of 2
Click here to see answer by solver91311(24713)

Question 472438: Find the distance between the following points.

(1, 3) and (4, 7)

Click here to see answer by ewatrrr(24785)

Question 472680: if the pitch of a roof is 1/4, how many feet in the horizontal direction correspond to a rise in 3 feet?
now i know the answer is 12 and i tried plugging the numbers into slope intercept form and got negative 12 but didnt know eactly if that was the right way to do it or not....please help!!!! thank you
Click here to see answer by algebrahouse.com(1659)

Question 472863: Is the line through points P(1, 9) and Q(9, 6) perpendicular to the line through points R(-6, 0) and S(-9, 8)? Explain.
a. Yes; their slopes have product -1
b. No; their slopes are not opposite reciprocals.
c. No; their slopes are not equal
d. Yes; their slopes are equal
Click here to see answer by ewatrrr(24785)

Question 472869: Write the sum of the two vectors as an ordered pair.
(5, -2) and (0, 0)
Click here to see answer by stanbon(75887)

Question 472865: A glider lands 17 miles west and 9 miles south from where it took off. The result of the trip can be described by the vector (-17, -9). Use distance (for magnitude) and direction to describe this vector a second way.
a. about 19 miles at 28 degrees south of west
b. about 28 miles at 19 degrees north of west
c. about 19 miles at 28 degrees north of west
d. about 28 miles at 19 degrees south of west
Click here to see answer by stanbon(75887)

Question 472864: An airplane aver the Pacific sights an atoll at an angle of depression of 5 degrees. At this time, the horizontal distance from the airplane to the atoll is 4629 meters. What is the height of the plane to the nearest meter?

Click here to see answer by Alan3354(69443)

Question 473264: The second angle of a triangle measure 10 more than the first angle. The third angle measures 30 less than twice the second angle. what are the measure of the 3 angles
Click here to see answer by stanbon(75887)

Question 473285: Hi tutors, please help with the following math problem. Thank you very much.
Jack and Mark have 49 beads. Mark and Ben have 37 beads. Jack and Ben have 60 beads. How many beads does each of them have and the sum of all?
I tried by adding 49 + 60 then minus 37 and divide 3, which I got 24. After that, i am stuck as I couldn't figure out how many does each boy have. I totaled up the numbers to be 74 but the answer should be 73.
Click here to see answer by jim_thompson5910(35256)

Question 473291: Hi tutors, here's a challenging 5th grade word problem which I truly have no idea to work it out.
William and Grace have $87. Grace and Siti have $115. William has 3/7 of Siti's amount. How much money does Grace have at first?
Please help. Thank you.
Click here to see answer by stanbon(75887)

Question 473426: A motel rents double rooms at $35 per day and single rooms at $23 per day. If 27 rooms were rented one day for a total of $849, how many rooms of each kind were rented?
Click here to see answer by Theo(13342)

Question 473427: Solve the problem by using a system of equations.
A motel rents double rooms at $35 per day and single rooms at $23 per day. If 27 rooms were rented one day for a total of $849, how many rooms of each kind were rented?
Click here to see answer by stanbon(75887)

Question 473617: A chemist has 35% NaCl solution and 50% NaCl solution. How many liters of each should he mix to get 10 L of NaCl Solution with 40% base concentration?
Click here to see answer by Alan3354(69443)

Question 473727: Find the coordinates of two points on the given line, and then use those coordinates to find the slope of the line. (If an answer is undefined, enter UNDEFINED.)
4y = 4
Click here to see answer by Theo(13342)

Question 473732: Solve the problem by using a system of equations. (Objective 4)
The income from a student production was $18,000. The price of a student ticket was $3, and nonstudent tickets were sold at $6 each. Five thousand tickets were sold. How many tickets of each kind were sold?

Click here to see answer by ewatrrr(24785)

Question 473726: Find the coordinates of two points on the given line, and then use those coordinates to find the slope of the line. (If an answer is undefined, enter UNDEFINED.)
y = -10x
Click here to see answer by Alan3354(69443)

Question 473712: Write the equation of the line that satisfies the given conditions. Express the final equation in standard form.
Contains the point (5, 6)and is perpendicular to the y axis
Click here to see answer by Alan3354(69443)

Question 473710: Write the equation of the line that satisfies the given conditions. Express the final equation in standard form.
Contains the point (4, -5) and is parallel to the y axis
Click here to see answer by Alan3354(69443)

Question 473713: Write the equation of the line that satisfies the given conditions. Express the final equation in standard form.
Contains the point (-4, 9) and is parallel to the line x − 2y = 6
Click here to see answer by Alan3354(69443)

Question 473758: 7 1/9 - 4 2/3
Ive tried over and over and I got a=3/2. Am I on the right track
Click here to see answer by Alan3354(69443)

Question 473748: F(x)=2x-3 when f (-2) f(-1) f(0) f(1) f(2)
F(x)=-x^2+1 when f() equals the same as above
Click here to see answer by MathLover1(20849)

Question 473811: During the first part of a trip a canoeist travels 95 miles at a certain speed. The canoeist travels 22 miles on the second part of the trip at a speed of 5 mph slower. The total time for the trip is 3 hrs. What was the speed on each part of the trip?
Click here to see answer by ankor@dixie-net.com(22740)

Question 474036: During the first part of a trip a canoeist travels 95 miles at a certain speed.
The canoeist travels 22 miles on the second part of the trip at a speed of 5 mph slower.
The total time for the trip is 3 hrs. What was the speed on each part of the trip?
Please provide exact answers for each part!
Click here to see answer by mananth(16946)

Question 474064: Investment. Thomas inherited $10,000 and invested it in two treasury bonds which pay 4% and 5% simple interest. The annual interest is $435. Find the amount invested at 5%?
Click here to see answer by stanbon(75887)

Question 474095: A Daily Tripling Salary:
Suppose someone offered you a job for 10 days under the following conditions. You will be paid $5 for the first day, $15 for the second, and $45 for the third, and so on, tripling your previous day's salary each day. How much would you earn altogether?
Click here to see answer by htmentor(1343)

Question 474298: How many positive integer values of n are such that n is odd and n^3 is between 100 and 1000?
Click here to see answer by solver91311(24713)

Question 474305: The total current in a parallel circuit equals the sum of the currents in the branches. The total current in six parallel branches is 1.9A. Some of the branches have currents of 0.25A and others have 0.45A. How many of each type of branch are in the circuit?
Click here to see answer by stanbon(75887)

Question 474302: In the math club, 40% of the members are boys while 60% are girls. if 15% of the girls leave, compute the percentage of the girls now inthe club (to the nearest percent).
Click here to see answer by jorel1380(3719)

Question 474261: x
-
8.9 < -3 Please help me, I really don't understand on how to solve this.
Click here to see answer by Alan3354(69443)

Question 474425: Solve the differential equation (x^2 - 8x + 15) dy/dx = 6y + 5
Click here to see answer by Edwin McCravy(20054)

Question 474405: http://imageshack.us/photo/my-images/809/page656.jpg/
Thank you for spend time do my home work
Click here to see answer by Theo(13342)

Question 474503: Solve. 2x2 � 8x � 14 = 0

Click here to see answer by stanbon(75887)

Question 474508: Please help....Solve and graph x2 + x � 4 = 0. (x^2+x-4 =0)

Click here to see answer by sofiyac(983)

Question 474519: Solve. (x � 3)^2 = 2
Solve. 2x^2 � 8x � 14 = 0
Solve. 3x^2 = �21x � 15

Click here to see answer by sofiyac(983)

Question 474596: The tens digit of a 2 digit number is 2 larger than 3 times the units digit. If the sum of the digits is 10, find the number
Click here to see answer by jorel1380(3719)

Question 474604: Write the equation of the line that has the indicated slope and contains the indicated point. Express the final equation in standard form.
m=2, (-2,-3)
Click here to see answer by rfer(16322)

Question 474655: What is the largest possible value of the expression n/3 - 3/n where n is an integer from 2 to 10 inclusive? Show work.
Click here to see answer by stanbon(75887)

Question 474651: What is the largest prime, p, such that one thirteenth of p is less than 9? Show work.

Click here to see answer by richard1234(7193)

Question 474650: If 1/3 + 1/x = 1/7, then find the value of x.
Click here to see answer by MathLover1(20849)

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