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Coordinate-system/64377: This question is from textbook An Incremental Development
Find the distance between (-5, -2) and (4, -3)
1 solutions
Answer 45028 by checkley71(8403)   on 2006-12-08 22:18:20 (Show Source):
You can put this solution on YOUR website!THE DISTANCE BETWEEN THE X POINTS IS 4-(-5)=4+5=9
THE DISTANCE BETWEEN THE Y POINTS IS -3-(-2)=-3+2=-1
THUS WE HAVE A TRIANGLE WITH SIDES 9 & 1.
TO FIND THE HYPOTENUSE WE USE THE PATHAGOREAN FORMULA A^2+B^2=C^2 (C^2 BEING THE HYPOTENUSE.
1^2+9^2=C^2
1+81=C^2
C^2=82
C=SQRT82
C=9.0553851 OR THE DISTANCE BETWEEN THESE TWO POINTS.
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Numeric_Fractions/64258: can you please help me in these solution I really i appriciated thank you
1) Multiply: [(1/4)z + (1/3)][(1/4)z - (1/5)]
2)Simplify and evaluate:
(22x5y-3z4/40x-2y-8z5)3
thank you so much
1 solutions
Answer 45027 by checkley71(8403) on 2006-12-08 22:10:13 (Show Source):
You can put this solution on YOUR website!(1/4Z+1/3)(1/4Z-1/5)
1/4X*1/4Z+1/4Z*1/3-1/5*1/4Z+1/3*-1/5
1/16Z^2+1/12Z-1/20Z-1/15
1/16Z^2+(5/60Z-3/60Z)-1/15
1/16Z^2+2/60Z-1/15
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Numbers_Word_Problems/64290: This question is from textbook Algebra
hi!
could you help me with this word problem.
thanks.
the sum of two numbers is 15. three times one of the numbers is 11 less than five times the other. find the number.
1 solutions
Answer 44925 by checkley71(8403) on 2006-12-07 21:46:52 (Show Source):
You can put this solution on YOUR website!X+Y=15 OR X=15-Y
3X=5Y-11 SUBSTITUTING (15-Y) FOR X WE GET
3(15-Y)=5Y-11
45-3Y=5Y-11
-3Y-5Y=-11-45
-8Y=-56
Y=-56/-8
Y=7 SOLUTION
THEN X=15-7
X=8 SOLUTION
PROOF
3*8=5*7-11
24=35-11
24=24
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Equations/64289: i have $1.70 in dimes and quarters. i have 3 more dimes than quarters. how many of each coin do i have?....I am the father of a 7th grader trying to explain this to her...thanks for your help...
1 solutions
Answer 44924 by checkley71(8403) on 2006-12-07 21:38:17 (Show Source):
You can put this solution on YOUR website!10D+25Q=170
D=3+Q SO WE HAVE
10(3+Q)+25Q=170
30+10Q+25Q=170
35Q=170-30
35Q=140
Q=140/35
Q=4 SO WE HAVE 4 QUARTERS &
D=3+4=7 DIMES
PROOF
10*7+25*4=170
70+100=170
170=170
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Travel_Word_Problems/64261: This question is from textbook Algebra 1
A ship travels from New York to Southampton,England at 33 mph. A plane traveling 605 mph takes 104 hours less to make the same trip. How far apart are the two cities?
1 solutions
Answer 44922 by checkley71(8403) on 2006-12-07 21:29:36 (Show Source):
You can put this solution on YOUR website!DISTANCE=RATE*TIME
DISTANCE=33(T+104)
DISTANCE=605T SEEING AS THE DISTANCES ARE THE SAME WE HAVE
33(T+104)=605T
33T+3432=605T
3432=605T-33T
572T=3432
T=3432/572
T=6 HOURS FOR THE PLANE &
6+104=110
PROOF
33(110)=605*6
3630=3630
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Functions/64280: The revenue for a sandwich shop is directly proportional
to its advertising budget. When the owner spent $2000 a month on advertising, the
revenue was $120,000. If the revenue is now $180,000, how much is the owner
spending on advertising?
1 solutions
Answer 44919 by checkley71(8403) on 2006-12-07 21:16:56 (Show Source):
You can put this solution on YOUR website!2000/120000=X/180000
120000X=36000000
X=36000000/120000
X=$3000 OR HOW MUCH THE OWNER SPENT ON ADVERTISING TO GET 180000 REVENUE.
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Miscellaneous_Word_Problems/64282: You throw three darts at the board shown at the right (scores of 1, 4 and 10). If each dart hits the board, what possible point totals can you score?
1 solutions
Answer 44917 by checkley71(8403) on 2006-12-07 21:09:01 (Show Source):
You can put this solution on YOUR website!.....1.....4.....10
.....3.............=3
...........3.......=12
..................3=30
.....2.....1.......=6
.....2............1=12
...........2......1=18
.....1.....2.......=5
.....1............2=21
...........1......2=24
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Word_Problems_With_Coins/64163: This question is from textbook Florida Prentice Hall Mathematics Pre-Algebra
you hand a costomer $0.40 in change.
a. in how many ways can you do this without using pennies?
b. for part (a), make a table.
1 solutions
Answer 44835 by checkley71(8403) on 2006-12-06 22:04:49 (Show Source):
You can put this solution on YOUR website!NICKELS...+..DIMES...+...QUARTERS...=.40
8X5.................................=.40
6X5=30....+...1X10=10..............30+.10=.40
4X5=20....+...2X10=20..............20+.20=.40
2X5=10....+...3X10=30..............10+.30=.40
0X5=0.....+...4X10..................=.40
1X5=5.....+...1X10=10....+..1X25=25..5+10=25=.40
3X5=15...................+..1X25=25..15+25=.40
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Graphs/64169: Given f(x) = –x3 + 3x2 + x + 7, find f(–3), f(0), and f(1)
1 solutions
Answer 44834 by checkley71(8403) on 2006-12-06 21:54:46 (Show Source):
You can put this solution on YOUR website!F(X)=-X^3+3X^2+X+7
F(-3)=-(-3)^3+3(-3)^2-3+7
F(-3)=-(-27)+3(9)-3+7
F(-3)=27+27-3+7
F(-3)=58
---------------------------------
F(0)=-(0)^3+3(0)^2+0+7
F(0)=0+0+0+7
F(0)=7
----------------------------------
F(1)=-(1)^3+3(1)^2+1+7
F(1)=-1+3+1+7
F(1)=10
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Graphs/64171: Determine which two equations represent parallel lines. Justify the answer.
(a) y = (5/7) x + 3
(b) y =(7/5) x + 5
(c) y = (7/5) x – 5
(d) y = –(5/7) x + 5
1 solutions
Answer 44831 by checkley71(8403) on 2006-12-06 21:46:19 (Show Source):
You can put this solution on YOUR website!THE SLOPE OF A LINE IS THE DETERMINING FACTOR IN IDENTIFYING IF THEY ARE PARALLEL OR PERPENDICULAR.
PARALLEL LINES HAVE THE SAME SLOPE.
THEREFORE B) Y=(7/5)+5 & C) Y=(7/5)-5 ARE PARALLEL
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Systems-of-equations/64111: Hi! Could someone please help me with this problem.
Let x=4,y=-3 and z=2
xy^2-3z^2
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(xy)^2(-3z)^2
1 solutions
Answer 44805 by checkley71(8403) on 2006-12-06 17:07:00 (Show Source):
You can put this solution on YOUR website!xy^2-3z^2 ......=4*(-3)^2-3(2)^2=4*9-3*4=36-12=24
-----------.........---------------------------------------------------------
(xy)^2(-3z)^2...=(4*-3)^2(-3*2)^2=-12^2*-6^2=144*36=5184
24/5184=1/216
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Equations/64154: I'm need the point-slope from for this to figure out the other froms of the equations, but im not sure how to get point-slope from from the following infromation... please help.
Line L passes through (1,-6)with slope 3/2. Write the point-slope form, slope-intercept form, and standard form of an equation for line L.
1 solutions
Answer 44802 by checkley71(8403) on 2006-12-06 16:48:02 (Show Source):
You can put this solution on YOUR website!Y=mX+b m=3/2 THE SLOPE & b=THE Y INTERCEPT
Y=3/2X+b SUBSTITUTE THE X & Y VALUES TO FIND THE Y INTERCEPT
-6=3/2*1+b
-6=3/2+b
b=-6-1.5
b=-7.5
THUS THIS LINE EQUATION IS
Y=3/2X-7.5
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Miscellaneous_Word_Problems/64152: Members of the Ski Club contributed equally to obtain $1800 for a holiday trip. When 6 members found that they could not go, their contributions were refunded and each remaining member then had to pay $10 more to raise the $1800. How many went on the trip?
1 solutions
Answer 44801 by checkley71(8403) on 2006-12-06 16:43:18 (Show Source):
You can put this solution on YOUR website!1800=m*c m=members & c=contribution
m=1800/c also
1800=(m-6)(c+10)
1800=(1800/c-6)(c+10)
1800=1800+18000/c-6c-60
-18000/c+60=-6c now multiply every term by c to eliminate the c in the denominator
-18000+60c=-6c^2
6c^2+60c-18000=0 divide all terms by 6
c^2+10c-3000=0
(c-50)(c+60)=0
c=50 & c=-60 the original cost is $50 then there were 1800/50=36 contributors
when 6 backed out there were 30 & they paid $60 each
proof
1800=30*60
1800=1800
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Functions/64053: Science and medicine. Celsius temperature readings can be converted to
Fahrenheit readings using the formula E=9/5C+32. What is the Fahrenheit
temperature that corresponds to each of the following Celsius temperatures: -10,
0, 15, 100?
1 solutions
Answer 44685 by checkley71(8403) on 2006-12-05 21:05:14 (Show Source):
You can put this solution on YOUR website!E=9/5C+32
E=9/5*10+32
E=18+32=50
--------------------
E=9/5*0+32=32
----------------------
E=9/5*15+32
P=27+32=59
---------------------
P=9/5*100+32
P=180+32=212
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Functions/64054: When x number of units are sold, the price of each unit (in
dollars) is given by P=-x/2+75. Find the unit price when the following quantities
are sold: 2, 7, 9, 11.
1 solutions
Answer 44682 by checkley71(8403) on 2006-12-05 21:00:45 (Show Source):
You can put this solution on YOUR website!P=-X/2+75
P=-2/2+75
P=-1+75=74
--------------
P=-7/2+75
P=-3.5+75
P=71.5
---------------
P=-9/2+75
P=-4.5+75
P=70.5
-----------------------
P=-11/2+75
P=-5.5+75
P=69.5
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Travel_Word_Problems/64037: Paul and Charlene are 420 miles apart. They start toward each other with Paul driving 16mi/h faster than Charlene. They meet in 5 hours. Find Carlene's speed.
Any help is appreciated.
1 solutions
Answer 44678 by checkley71(8403) on 2006-12-05 20:50:08 (Show Source):
You can put this solution on YOUR website!450=5(x+x+16)
450=5x+5x+80
10x=450-80
10x=370
x=37/10
x=37 mph solution for Charline's speed.
37+16=53 mph for Paul's speed
proof
450=5*37+5*53
450=185+265
450=450
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