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Question 353260: how can i figure this math problem out classroom on one side of the drama building are all numbered with consecutive odd integers. If the first room on this side of the building is numbered d, write an expression in d for the sum of the first seven classroom numbered in a row. then simpilfy this expression.
i dont understand how to do it may u PLEASE explain to me
Click here to see answer by sudhanshu_kmr(1152)

Question 353267: Write equation in slope-intercept form.
3x + 2y = 10
Click here to see answer by ewatrrr(24785)

Question 353410: Write the system of linear equations in trian-
gular form
x + y + z = 7
3x + 4y + z = 13
2x − 2y + 9z = 7
What is triangular form and how would I solve this problem using it?
Click here to see answer by stanbon(75887)

Question 353415: "How do you graph this line, using the slope-intercept form
what I have tried:
2y/2=2
1/2/2=?
-10/2=-5
y=?x-5
Click here to see answer by Alan3354(69443)

Question 353415: "How do you graph this line, using the slope-intercept form
what I have tried:
2y/2=2
1/2/2=?
-10/2=-5
y=?x-5
Click here to see answer by edjones(8007)

Question 353471: The sum of the denominator and numerator of a fraction is 14. When 7 is added to each, the resulting fraction has a value of 3/4. What is the original fraction?
Click here to see answer by edjones(8007)

Question 353542: X + Y = 10 , 3X + Y = 12
I need some help trying to figure these problems out can some one please help me
Click here to see answer by mananth(16946)

Question 352702: solve each equation for y, find three solutions of the equation, and then graph it.
2y+x=-2
Click here to see answer by sofiyac(983)

Question 353720: A chemist has one solution that is 80% acid and another that is 30% acid. He needs 200 liters of a solution that is 62% acid. How much of each should be used?
Let x=number of liters of 80% solution
Y= number of liters of 30% solution
Click here to see answer by stanbon(75887)

Question 353734: Please help me solve this. Find the value of k such that the system of linear equations is inconsistent.
4x + 2y = 6
−6x + ky = −8

Click here to see answer by robertb(5830)

Question 353780: two athletes race around a 400-m track oval at a speed of 6 and 8 meters per second, respectively. How long will it take before the faster athlete gains one lap on the slower ones?
Click here to see answer by solver91311(24713)

Question 353817: two groups of tourists traveled by automobiles. One party averaged 45 kilometers per hour and the other 35 kilometers per hour. The faster party traveled 30 km farther than the slower party and made the trip in two hours less time. How long did each party travel?
Click here to see answer by mananth(16946)

Question 353820: an airplane traveling 280 miles per hour was reported over an airfield. Another plane took off from the airfield 6 minutes later and followed the first plane. The second plane's average speed was 320 miles per hour. Assuming the planes did not change speed and direction, how far from the airfield did the second plane overtake the first plane?
Click here to see answer by mananth(16946)

Question 353805: A repair technician charges $80 for the first thirty minutes of each house call plus $2 for each additional minute. The repair technician charged a total of $170 for a job . how many minutes did the repair technician work ?
A 45 min B 55 min C 75 min D 85 min
Click here to see answer by nerdybill(7384)

Question 353867: Use a t-table and find at least three points
y=-2/5x+2
Click here to see answer by ewatrrr(24785)

Question 353990: how would you solve a problem such as:
A rectangular piece of cardboard is made into an open box (that is, it has no top) by cutting a 2-inch square from each corner and turning up the sides. If the original piece of cardboard (before the corners are cut out) has an area of 216 square inches and the completed box has a volume of 224 cubic inches,
determine the dimensions of the piece of cardboard.
Click here to see answer by scott8148(6628)

Question 354067: Two athletes race around a 400-m track oval at a speed of 6 and 8 meters per second, respectively. How long will it take before the faster athlete gains one lap on the slower one?
Click here to see answer by mananth(16946)

Question 354066: i need help solving the Matrix system using lines equation
1 -9/2 3/2
9 8 2
using -9r1+r2 (neg9 times row1 plus row 2)
HOW IN GODS NAME DID THEY GET
1 -9/2 3/2
0 97/2 -23/2

Click here to see answer by Alan3354(69443)

Question 354409: I am trying to explain this to my son, but he is not getting how I am explaining it. Here is the question: The equation y=1.95x + 18 is used to model the relationship between the number of people fed by each farm worker and the time elapsed since 1950. What question is being asked in the equation y=1.95(10) + 18? What is the answer?
Click here to see answer by scott8148(6628)

Question 354418: How many kilograms of nuts must be added to 1.8 kg of plain banana bread batter to produce a batter that is 10 % nuts?
Click here to see answer by Alan3354(69443)

Question 354471: How do you clear a fraction?
Click here to see answer by robertb(5830)

Question 354562: 1. I need help with the following questions. Determine whether the point(1,4) is a solution of the system. Using the subsituting method.
6x + 9y = 42, 5x + 0y = 5
2. The point 1, 9 lines on the line 2x +10y =92. Determine if this a solution.

2x +10y = 92, -6x -2y = -24
3. Use the elimination method. If the system has no solution or an infinite number of solution state this.
-6x -6y = -12, -6x - 7y = 14
4. Use elimination method. If the system has no solution or infinite number of solution state this.
22x + 10y =147, 0x + 2y = -14
Click here to see answer by Alan3354(69443)

Question 354850: solve the system using any algebraic method..
x+y=2
3x-2y=6
Click here to see answer by Fombitz(32388)

Question 354949: what is the x-intercept for the equation: 3x - 7y = 11
Click here to see answer by mananth(16946)

Question 355026: the ten's digit of a two digit number is 3 greater than the unit's digit. if the number is divided by the sum of the digits, the quotient is 6 and the remainder is 8. find the number.
Click here to see answer by stanbon(75887)

Question 355016: one alloy contains 80% gold (in weight) and another alloy contains 55% gold. how many grams of each alloy should be contained to make a 40kg of an alloy that contains 70% gold?
Click here to see answer by mananth(16946)

Question 354992: I am supposed to solve the systems of equation in three variables.
5x+2y=4
3x+4y+2z=6
7x+3y+4z=29
Click here to see answer by Edwin McCravy(20056)

Question 355693: can you help me solve this? 2/t=t/4t-6. I cannot get the correct answer of (6,2)
Click here to see answer by Fombitz(32388)

Question 356136: perimeter of a rectangle is 204 inches. the length exceeds the width by 62 inches. what is the length and width?
Click here to see answer by mananth(16946)

Question 356133: -7/2x is equal to or greater than -1/4
Click here to see answer by nyc_function(2741)

Question 356127: y-9>2y-2 are 1, -14, -17, -3 soultions
Click here to see answer by edjones(8007)

Question 356118: i 2005, the shabelle river rose an estimated 5.25 inches every 15 hours.the increase in water level is represented by the functon f(x)=5.25, where x is the numbe of hours.
Click here to see answer by Jk22(389)

Question 356253: Solution of Linear Systems by the Echelon Method.
4x-y+3z=-2
3x+5y-z=15
-2x+y+4z=14
And:
x+2y+3z=11
2x-y+z=2
Thank you in advance!
Click here to see answer by Alan3354(69443)

Question 356299: How do i make a system that will have an infinite number of solutions in the y=a+bx form?
Click here to see answer by Fombitz(32388)

Question 356304: Do two linear equalities always have a solution? If not, why not? If yes, under what conditions?

Click here to see answer by Fombitz(32388)

Question 356553: Solve the system algebraically:
x-2y=1
y= sq root of (x-1)
Click here to see answer by stanbon(75887)

Question 356539: Solve the system by the method of substitution.
6x-3y-4=0
x+2y-4=0
Click here to see answer by Alan3354(69443)

Question 356540: Solve the system by the method of substitution.
1/2x + 3/4y = 10
3/4x - y = 4
Click here to see answer by Alan3354(69443)

Question 356646: Please help me solve this equation:
x - 1 < = 5 or x + 3 > = 10
Click here to see answer by stanbon(75887)

Question 356646: Please help me solve this equation:
x - 1 < = 5 or x + 3 > = 10
Click here to see answer by mananth(16946)

Question 356656: I need help with -3(7-3n)+2n=5(2n-4).
Click here to see answer by stanbon(75887)

Question 356658: I need help with -7+8(5-3q)=3(7-9q).
Click here to see answer by rfer(16322)

Question 356654: I need help with 1/3(7x+5)=3x-5.
Click here to see answer by rfer(16322)

Question 356652: I need help with 1/2(8n-2)= -(-8+9n)-5n.
Click here to see answer by rfer(16322)

Question 356653: I need help with 2/3(9n-6)=4(n+1).
Click here to see answer by rfer(16322)

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