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Question 351174: The sum of two numbers are 72. Their difference is 48. Find the numbers.
so far i did , let x represent the first number
let y represent the second number.
x+y=78
x-y=48
now i have to solve it but i don't know if i did.
thank you for helping.
Click here to see answer by ewatrrr(10682)

Question 351227: Model this situation using a linear system. A server earned $55 in tips, all in loonies and toonies. she had 38 coins altogether. how many toonies were there?
so far ; let x represent the number of loonies.
let y represent the number of toonies.
x+y=38
x-2y=55
now i need to solve it .
Click here to see answer by stanbon(57361)

Question 351406:
Click here to see answer by solver91311(16897)

Question 351406:
Click here to see answer by NRobinson(4)

Question 351396: 1/3(9x-3y)-(4x-1)+4y
Click here to see answer by rfer(12660)

Question 351421: Murray and Max must paint the fence around their home. The fence is 810 feet long (they have a nice piece of property). Murray agrees to paint 25% more of the fence than Max (He bet on the Knicks). How many feet of fence must each paint?
Click here to see answer by rfer(12660)

Question 351505: Billy rented a truck for one day. There was a base fee of 18.99 ,
and there was an additional charge of 50 cents for each mile driven.
Billy had to pay 227.07 when he returned the truck. For how many miles
did he drive the truck?
I just want to be sure I did this right.
18.99 + .50(x) = 227.07
.50(x) = 208.08
x = 416.16
Thanks for the help, anyone who answers!
Click here to see answer by mananth(12270)

Question 351673: Solve by the addition method: (x/4) – (y/3) = – 4 and (x/8) + (y/6) = 0

Click here to see answer by Fombitz(13828)

Question 351659: A field can be ploughed in 16 days. If 18 more hectares of land is ploughed daily, the work will be finished in 10 days. Find the area of the field.
Click here to see answer by ankor@dixie-net.com(15653)

Question 352018: the perimeter of a rectangle plot is 68m and the length of its diagonal is 26m what is the area?
Click here to see answer by robertb(4012)

Question 352041: khalid makes an investment at 4% simple interest. At the end of the 1 yr, the total value of the investment is $1560. How much was originally invested?
Click here to see answer by Fombitz(13828)

Question 352047: Jon has 1018 points in his math class. He must have 89% of the 1300 points
possible by the end of the term to receive credit for the class. What is the minimum number of additional points he must earn by the end of the term to receive credit for the class?
Click here to see answer by edjones(7569)

Question 352045: Jim has gotten scores of 81 and 67 on his first two tests. What score must he
get on his third test to keep an average of 75 or greater?
Click here to see answer by edjones(7569)

Question 352066: If lynn can type a page in p minutes, what piece of the page can she do in 5 minutes?
Click here to see answer by mananth(12270)

Question 352065: A magazine earned $ 68 million in 1998 from advertising revenue and
subscriptions. If the advertising revenue was 6 times the subscription revenue, how much did the magazine earn from advertising?
Click here to see answer by mananth(12270)

Question 352012: The perimeter of a rectangle is 82 yards.The width is 15 yards less than the length.What are the dimensions of the rectangle?
Click here to see answer by mananth(12270)

Question 352154: a video store received two shipments of videocassettes. the value of the first shipmetn which contained 8 short and 16 long was $224 the value of the second which contained 6 short and 18 long casseetes was $228 find the price of one long cassette
Click here to see answer by stanbon(57361)

Question 352044: On average, 10.8 % of the money consumers spend in
supermarkets in England goes to the purchase of snacks and baked
goods, which is four times the percent of money spent on cereals and
rice. What percentage of the money spent by consumers in England's
supermarkets is for the purchase of cereal and rice?
Click here to see answer by nyc_function(2733)

Question 352182: You put $4,750 into a bank paying 1.4% simple interest per year. Suppose you don’t take anything out of the account. How much do you have after two years?

Click here to see answer by sofiyac(695)

Question 352433: 2 diamond rings and 4 silver rings cost $1440. a diamond ring and a silver ring cost $660. how much does a silver ring cost ?
i know the answer is $60. we did it with process of elimination and could not figure out another way
we got 2x +4y=1440
x =y =660
Click here to see answer by mananth(12270)

Question 352517: Please help me to solve this question: Manning the gardener has 26 lb of a mixture of fertilizer and weed killer.If 1 lb of the mixture is replaced by weed killer the result is a mixture that is 5 percent weed killer.What percent of the original mixture was weed killer?
Click here to see answer by bsce(1)

Question 352525: the length of a rectangle is 17 feet less than 4 times the width. the perimeter is 196 feet. find the width (in feet)

Could you please show me the steps like how you did it? PLEASE
Click here to see answer by robertb(4012)

Question 352533: Choose the one alternative that best completes the
statement or answers the question.
Find f(x) and g(x) such that h(x) = (f  g)(x).
1) h(x) = |6x + 9|
A) f(x) = x, g(x) = 6x + 9
B) f(x) = -| x | , g(x) = 6x + 9
C) f(x) = |-x | , g(x) = 6x - 9
D) f(x) = | x | , g(x) = 6x + 9
Click here to see answer by Jk22(389)

Question 352534: 45% of those who purchase music CDs online are 18-23 years old. This is three
and one-half times the number who are 38-43 years old. What percent of online
music purchasers are 38-43 years old?
Click here to see answer by Jk22(389)

Question 352444: find the dimensions of a rectangular persian rug whose perimeter is 32 ft and whose area is 63 ft squared
Click here to see answer by mananth(12270)

Question 352530: Find an equation for the circle.
Center at ( 2, - 6), diameter of length 6.2
Click here to see answer by Waveez(3)

Question 352207: A new car worth $45000 is depreciating in value by $5000 per year. Write a formula that models the car's value, y, in dollars, after x years. Use the formula from part (a) to determine after how many years the car's value will be $10000. Graph the formula from part (a) in the first quadrant of a rectangular coordinate system. Then show your solution to part (b) on the graph.
Click here to see answer by sofiyac(695)

Question 352851: Evaluate |2x – 3| when x = 2
Click here to see answer by nyc_function(2733)

Question 352856: Solve 2(x – 4) < 3x + 8. Choose how you want to express the solution.
Click here to see answer by nyc_function(2733)

Question 352947: To rent a van it intially costs $87 down plus $.031 per mile.
Write a fuction that describes the total cost of renting the van. I dentify the independent and dependent variables and tell what each one represents.
How far can you drive the van if you have $275? What is the cost if you drive 1358 miles?
Click here to see answer by robertb(4012)

Question 353159: use the distrbutive property to helpyou solve the equation
5(w-5)=20
i come up with
5w-25=20
+25 +25
5w=45/5
w=9
is this correct?
Click here to see answer by abcdefghijklmnop(1)

Question 353244: A room in a house is 8 feet longer than it is wide and has a an area of 180ft^2. Find the dimension

Click here to see answer by ewatrrr(10682)

Question 353356: A long distance telephone call using Down East Calling costs 10 cents for the first minute and 8 cnts for each additional minute. The same call on Long Call Systems costs, 16 cents for the first minute and 6 cent for each additional minute. For what length phone calls is Down East Calling less expensive:
Click here to see answer by stanbon(57361)

Question 353334: Please help me solve this equation 2/3y+2=1/5+y
Click here to see answer by edjones(7569)

Question 353403: Mila is saving for university. She has $9000, of which some is in a savings account earning 3.25% per year and the rest is in a GIC earning 5% a year. If she earned $324 in simple interest last year in total, how much was invested in her GIC?
Click here to see answer by mananth(12270)

Question 353564: Here is the story problem: There is a 6-person rectangular table for $20.00 and a 10-person round table for $52.00. There is a wedding for maximum of 230 people. The hall holds at least 37 tables of which 10 are rectangular. What is the maximum cost for the tables and how many are needed.
Click here to see answer by ewatrrr(10682)

Question 352853: a) Simplify as much as possible: 7[x – 2(4 + 3x)]
b) Simplify as much as possible: [14 – 2(8 – 3²)] ÷ 6

Click here to see answer by sofiyac(695)

Question 353623: three times the sum of twice a number and 6 equals 5 times the number less 10 find the number

Click here to see answer by sofiyac(695)

Question 353592: Perimeter of a rectangle. A rectangle has a fixed width
and a variable length. Let P represent the perimeter and L
represent the length. P = 28 inches when L = 6.5 inches
and P = 36 inches when L = 10.5 inches. There is a linear
equation that expresses P in terms of L.
a) Find the equation.
b) What is the perimeter when L = 40 inches?
c) What is the length when P =215 inches?
d) What is the width of the rectangle?

Click here to see answer by sofiyac(695)

Question 353333: Please help me solve this equation 1/6y+1/4y=-1
Click here to see answer by Fombitz(13828)

Question 353640: there are 385 surfers in surf city. Two-thirds are boys and one-twelfth are girls. if there are two girls fro every boy, how many boys and girls are there in surf city?
Click here to see answer by Alan3354(30993)

Question 353926: How many liters of some solution containing 15% of chemicals should be added to the same kind of solution with 65% chemicals to obtain 10 liters of solution with 50% of chemicals?
Click here to see answer by checkley77(12569)

Question 353950: A crew of 8 can row 20 kilometers/hour in still water. The crew rows upstream and then returns to its starting point in 15 minutes. If the river is flowing at 2 kilometers/hour, how far upstream did the crew row?
Please be detailed in your answer, Thank You!
Click here to see answer by scott8148(6628)

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