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checkley75 answered: 3664 problems
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1 solutions
Answer 54338 by checkley75(3666)   on 2007-03-24 16:04:26 (Show Source):
You can put this solution on YOUR website!1/2 OF THE CORD (12)AND THE RADIUS (13) FORM 2 SIDES OF A RIGHT TRIANGLE. THE THIRD SIDE IS THE DISTANCE FROM THE CENTER. THUS:
12^2+X^2=13^2
144+X^2=169
X^2=169-144
X^2=25
X=5 DISTANCE FROM THE CENTER.
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Functions/72003: Help please:
Please show and explain work
Question 23 (Worth 2 points)
Find the product (x+5)(x+7).
Question 29 (Worth 2 points)
Solve the inequality and describe the graph of the solution.
-3x + 4 > 7
Question 31 (Worth 2 points)
Which of the following relations is NOT a function?
(2,1), (1,-2), (-3,2), (2,-3)
(2,-1), (-1,2), (-2,3), (3,-2)
(-3,-2), (-1,0), (0,1), (1,2)
(-2,1), (-1,2), (1,1), (2,3)
Question 36 (Worth 2.0 points)
What is the degree of this polynomial:
3x3 - 2y4 + 2xy2
Question 41 (Worth 2 points)
Solve the following expression when x = 4, and y = -3.
2(x-2y)
Answer blank 1:
Answer not accepted. Expected Answer: 20
Question Information: 2[4-2(-3)]=
2(4+6)=
2(10)=
20
Question 44 (Worth 2 points)
Find: - 8xy(4x2y + 7x - 6y2)
Question 46 (Worth 2 points)
Solve the following system of equations using the substitution method:
4x - y = -6
x + 2y = 3
1 solutions
Answer 54336 by checkley75(3666) on 2007-03-24 15:54:54 (Show Source):
You can put this solution on YOUR website!(X+5)(X+7)=X^2+5X+7X+35=X^2+12X+35
3X+4>7, 3X>7-4, X>3/3, X>1 (NO GRAPH)
THE REST I LEAVE UP TO YOU.
WE SOLVE PROBLEMS. WE DON'T DO HOMEWORK!
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Systems-of-equations/75645: 5) The first side of a triangle is 5 inches less than the second side, and the third side is twice as long as the first sides. If the perimeter of the triangle is 33 iches, find the lengths of the sides of the triangle.
6) The shortest side of a triangle is 8 feet less than the medium side, and the longest side is 4 feetlonger than 3 times the shortest side. If the perimeter is 27 feet, find the length of the shortest side.
1 solutions
Answer 54335 by checkley75(3666) on 2007-03-24 15:49:04 (Show Source):
You can put this solution on YOUR website!LET X BE THE SECOND SIDE
X-5 IS THE FIRST SIDE
2(X-5) IS THE THIRD SIDE
NOW WE ADD ALL THREE SIDES & SET THEM EQUAL TO 33
X+(X-5)+2(X-5)=33
4X-5-10=33
4X=33+15
4X=48
X=48/4
X=12 INCHES FOR THE FIRST SIDE
12-5=7 FOR THE SECOND SIDE &
2(12-5)=2*7=14 FOR THE THIRD SIDE
PROOF
12+7+14=33
33=33
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LET M=MEDIUM SIDE
M-8=SHORTEST SIDE
3(M-8)+4=LONGEST SIDE
M+(M-8)+3(M-8)+4=27
M+M-8+3M-24+4=27
5M=27+8+24-4
5M=55
M=55/5
M=11 THE MEDIUM SIDE
THE SHORTEST SIDE IS 11-8=3 FEET.
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Quadratic_Equations/75651: I appreciate your help,I really need some help with this.
Solve the following equations.
a)3x^2+bx-3=0
b)5x^2+bx+1=0
c)-3x^2+bx-3=0
d) Write a rule for judging if an equation has solutions by looking at it in standard form.
Thanks a bunch!
1 solutions
Answer 54334 by checkley75(3666) on 2007-03-24 15:38:28 (Show Source):
You can put this solution on YOUR website!3X^2+BX-3
(3X-3)(X+1) BX=0X
OR
(3X+1)(X-3) BX=-8X
-------------------------------------
5X^2+BX+1
(5X-1)(X-1) BX=-6X
OR
(5X+1)(X+1) BX=6X
--------------------------------------
-3X^2+BX-3
(-3X-3)(X+1) BX=-6X
OR
(3X+1)(-X-3) BX=-10X
--------------------------------------
DON'T KNOW IF THERE IS A SIMPLE RULE BUT TRY THIS ONE
WHEN THE AX^2 TERM HAS AN (A) VALUE=1 THEN THE SUM OR DIFFERENCE OF THE FACTORS OF THE (AX^2+BX+C) (C) VALUE=THE (B) VALUE - THEN IT IS FACTORABLE.
EXAMPLE:
X^2+9X+20 FACTORS OF 20 ARE 4&5 WHICH WHEN ADDED EQUAL 9 THUS:
(X+4)(X+5)=X^2+9X+20 FACTORS OF -20 ARE -4&5 OR 4&-5 AND WHEN ADDED MUST EQUAL -1
X^2-X-20=(X+4)(X-5)
X^2-21X+20 FACTORS HERE ARE -1&-20, 1&20 BUT THE SET THAT ADDS UP TO -21 ARE
-1&-20
(X-1)(X-20)
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Equations/75635: Determin the best method to solve the system of equations.
Then solve the system.
5x-2y=7
2x+5y=-3
1 solutions
Answer 54309 by checkley75(3666) on 2007-03-23 20:19:52 (Show Source):
You can put this solution on YOUR website!PROCESS OF ELIMINATION WOULD BE MY VOTE.
MULTIPLY EQUATION #1 BY 2 & EQUATION #2 BY -5.
2(5X-2Y=7), 10X-4Y=14
-5(2X+5Y=-3), -10-25Y=15 NOW ADD THESE 2 EQUATIONS THUS:
10X-4Y=14
-10X-25Y=15
---------------------------
0X-29Y=29
Y=29/-29
Y=-1 ANSWER.
NOW SUBSTITUTE -1 FOR Y AND SOLVE FOR X
5X-2*-1=7
5X+2=7
5X=7-2
5X=5
X=5/5
X=1 ANSWER.
PROOF
2*1+5*-1=-3
2-5=-3
-3=-3
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Graphs/75633: find the slope and y-intercept of the line which is the graph of the equation
2y=5(x+1)
1 solutions
Answer 54304 by checkley75(3666) on 2007-03-23 20:01:44 (Show Source):
You can put this solution on YOUR website!2Y=5(X+1)
2Y=5X+5
Y=5X/2+5/2 THE SLOPE OF THIS LINE IS (5/2) & THE Y INTERCEPT IS (0,5/2)
 (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = 5x/2 +5/2).
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Polynomials-and-rational-expressions/75550: The distance from a star to a planet is 3.1x10^18m. How long does it take light, traveling at 10^16m/year, to travel from the star to the planet?
1 solutions
Answer 54199 by checkley75(3666) on 2007-03-22 21:53:57 (Show Source):
You can put this solution on YOUR website!YOU NEED TO DIVIDE THE NUMERIC VALUES THUS:
3.1/1=3.1 NOW SUBTRACT THE EXPONENTS OF THE 10 VALUE THUS:
18-16=2 THUS WE HAVE AS A RESULT:
3.1*10^2
3.1*10^18/10^16=3.1*10^2 M/YEARS TO REACH THE THE PLANET.
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Geometry_Word_Problems/75472: This question is from textbook
Concrete is sold by the yard, which means by the cubic yard. It costs $70 per yard. How many cubic feet are in a cubic yard? How much would it cost to pour a slab that is 14ft by 16ft by 6in for a patio?
1 solutions
Answer 54195 by checkley75(3666) on 2007-03-22 21:44:01 (Show Source):
You can put this solution on YOUR website!THERE ARE 3*3*3=27 CUBIC FEET IN A CUBIC YARD.
14*16*.5=112 CUBIC FEET FOR THE SLAB.
112/29=3.86 CUBIC YARDS.
3.86*70=$270.20 FOR THE 112 CUBIC FEET (3.86 CUBIC YARDS).
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Circles/75495: a swimming pool has the shape of a semi-circle. if the area is 308 square meters, find the perimeter of the pool.[pi=22/7]
1 solutions
Answer 54187 by checkley75(3666) on 2007-03-22 21:31:06 (Show Source):
You can put this solution on YOUR website!AREA OF A CIRCLE=PI*R^2
308=(22/7*R^2)/2 CROSS MULTIPLY
(22/7*R^2)=616
22R^2/7=616 CROSS MULTIPLY AGAIN
22R^2=616*7
22R^2=4312
R^2=4312/22
R^2=196
R=14 METERS IS THE RADIUS OF THE POOL.
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Polynomials-and-rational-expressions/75496: This question is from textbook Elementary algebra
(x+2) to the 3 power.
I'm only getting half of this right....I am spreading it out, three times, and cross multipling but it's not working. Thanks for your help
Wasn't sure how to put the power in.
1 solutions
Answer 54185 by checkley75(3666) on 2007-03-22 21:25:38 (Show Source):
You can put this solution on YOUR website!X+2
X+2
----------------
X^2+2X+2X+4
X^2+4X+4
X+2
--------------------
X^3+4X^2+4X+2X^2+8X+8
X^3+6X^2+12X+8 ANSWER.
---------------------------------------
YOUR ANSWER & MY ANSWER IS THE SAME.
YOU NEED TO MULTIPLY EVERY TERM FROM THE FIRST MULTIPLICATION BY (X+2)
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Miscellaneous_Word_Problems/75501: Randall has been to bat 45 times so far this season. he has gotten 10 hits for a batting average of .222. how many consecutive hits would he get to raise his batting average to .300
1 solutions
Answer 54182 by checkley75(3666) on 2007-03-22 21:21:58 (Show Source):
You can put this solution on YOUR website!(10+X)/(45+X)=.5 CROSS MULTIPLY
.5(45+X)=10+X
22.5+.5X=10+X
X-.5X=22.5-10
.5X=12.5
X=12.5/.5
X=25 CONSECUTIVE AT HITS WILL RAISE THE AVERAGE TO 500
PROOF
35/70=.5
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Expressions-with-variables/75506: Social science. If there are 6 x 10(9th power) people on the Earth and there is enough freshwater
to provide each person with 8.79 x 10(5th power) L, how much freshwater is on the
Earth?
thanks
1 solutions
Answer 54179 by checkley75(3666) on 2007-03-22 21:16:42 (Show Source):
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Quadratic_Equations/75508: how do i solve x squared - 34 + 15, and how can i do it before tomorrow, 3-23-07, i have a MAJOR test tomorrow and stressing REALLY REALLY BAD over it
1 solutions
Answer 54176 by checkley75(3666) on 2007-03-22 21:11:19 (Show Source):
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