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

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Question 449827: Hi I am completley lost on this question that was asked in my math homework.
a square has its length increased by 2 inches and its width decreased by 3 inches. the resulting rectangle has an area of 14 square inches. Determine the area of the original square?
help is much appericated thank you!
Click here to see answer by ankor@dixie-net.com(15747)

Question 449883: If y is halved, x is ________________.
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Question 449885: In I=PRT, If P and R are constant and T is tripled, I is ____________________.
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Question 449881: In the formula x=30/y, if y is doubled, x is _________________.
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Question 449890: A farmer can plow a field in 24 hours. His son, with a larger plow, can plow it in 12 hours. The farmer asked that they work together so they could finish before the rain started. It rained 7 hours later. Had they finished plowing before the rain?
Click here to see answer by rwm(914)

Question 449892: Ace has $3.15 in nickels and dimes. He has 15 more nickels than dimes. How many of each type of coin does he have?
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Question 449513: For primes "a" and "b", if a>b, the "ab" has __ unequal prime factors.
A)4
B)3
C)2
D)1
Please explain how you did it. Thanks.
Click here to see answer by richard1234(5390)

Question 449516: No matter what two integers I choose, their squares cannot differ by
A) 2002
B) 2003
C) 2004
D) 2005
Please explain your reasoning. Thank you.
Click here to see answer by richard1234(5390)

Question 450016: what do i do if the hypotonuse in a square root?
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Question 449906: The half-life of carbon-14 is 5700 years.Find the age of a sample at which 18% of the radioactive nuclei originally present have decayed.
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Question 450100: Annual losses for a manufacturing company in Texas increased from $135,000 in 2004 to 220,000 in 2009. Predict the losses in 2011.
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Question 450105: which is the median of the data set {1,4,4,4,5,8,8,10,11,11}?
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Question 450123: What is the approximate standard deviation of the data set {1,1,6,8,10,12}?
A 4.2
B 6.3
C 17.6
D 38.0
Click here to see answer by ewatrrr(10682)

Question 450146: 6% of 1000 students forgot there locker combination how many students is that?
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Question 450115: What is the expansion of the binomial (2k+4)^4?
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Question 450110: When rescuing a woman from a burning building, fireman found that the height of the window she was leaning out of was 1m less than the length of the ladder. The distance from the foot of the ladder to the building was 8m less than the length of the ladder. Find the length of the ladder.
Click here to see answer by ankor@dixie-net.com(15747)

Question 450276: Every human has blood type A,B,O or AB. 1/10 have type B and 23/50 have type O.
What is the probability that someone has blood type A or AB?
f 0.44
g 0.48
h 0.52
j 0.56
Click here to see answer by richard1234(5390)

Question 450273: A movie company surveyed 1,000 people. 229 people said they went to see the new movie on Friday, 256 said they went on Saturday. If 24 people saw the movie both nights, what is the probability that a person chosen at random saw the movie on Friday or Saturday?
a 0.413
b 0.437
c 0.461
d 0.485
Click here to see answer by jorel1380(2518)

Question 450289: Independent and Dependent events: Probability
Steven rolled a 1-6 number cube four times. The result was 4 odd numbers.
Click here to see answer by rfer(12731)

Question 450595: Joan And Maria earn money by babysitting . If Joan earn twice as much as maria,and the two girls earn$40, how much more does maria earn?
Click here to see answer by rwm(914)

Question 450807: Thanks for answering! WILL LEAVE GREAT COMMENT FOR YOU !
Two years from now, Jim will be twice as old as Joe will then be. Ten years ago, Jim was 5 times as old as Joe was. Find the present age of each person.
GOD BLESS!
Click here to see answer by ankor@dixie-net.com(15747)

Question 450818: Fifteen years from now, Mr. Thomas will be twice as old as Mrs. Thomas is now, whereas Mrs. Thomas will then be as old as Mr. Thomas will be 10 years from now, How old are Mr.Thomas and Mrs. Thomas?
THANKYOU!
Click here to see answer by jorel1380(2518)

Question 450951: The ratio of a rectangular field is 5:4. The perimeter of the field is 324 meters. What are the dimensions?
My attempt:
324=2(5)+2(4)
324=18 divide by 18
X=36
Click here to see answer by robertb(4012)

Question 450969: It takes 4 minutes to fill a tank with water. The tank has a hole, however, through which water drains. In 16 minutes the tank can go from full to empty. How long will it take to fill the tank if the hole is not repaired?
Click here to see answer by stanbon(57984)

Question 450945: The ratio of two numbers is 5:7. If 6 is added to each number, the ratio of the numbers is 7:9. What are the numbers?
Click here to see answer by robertb(4012)

Question 451003: there's a total of 78 handshakes and the equation is h=p(p-1)/2 so how many people are there in a group?
Click here to see answer by nerdybill(7011)

Question 451520: How many milliliters of water must be added to 10 milliliters of a 30% sulfuric acid solution to make a 15% sulfuric solution?
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Question 451519: Becky has 20 coins; some are quarters and the rest are dimes. The total vaue of the coins is $3.65. Find the number of each kind of coin.
Click here to see answer by solver91311(17077)

Question 451516: Christie's mother gave her $9.00 to buy 10 cent and 15 cent stamps. Christie returned with $1.75 in change and a total of 60 stamps. How many of each kind of stamp did she buy?
Click here to see answer by rwm(914)

Question 451513: Sandy has a total of 41 quarters and nickels. The value of her money is $7.05. How many of each coin does she have?
Click here to see answer by pedjajov(51)

Question 451927: The owner of a home decorating shop wants to mix dried corn for $6lb., dried cranberries selling for $5/1b. and flour selling for $3 lb. to get 10 pounds of a mixture that would sell for $3.80/lb. he wants to use twice as many pounds of dries corn as drive cranberries. how many pounds of each of the 3 ingredients should he use?
Click here to see answer by stanbon(57984)

Question 451896: The bases in a baseball diamond are 90 ft apart. A player picks up a ground ball 11 ft from third base, along the line from second base to third base. Determine the angle that is formed between first base, the player's present position, and home base.
I'm not sure as to where to start with this question. Please clarify by showing all steps.
Click here to see answer by ankor@dixie-net.com(15747)

Question 452151: If 2 men take 8 days to mow a field and the faster man can do it alone in 12 days how long will it take the slower man to do it alone?
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Question 452283: Any "x" which satisfies ___ also satisfies 1- |x+1| <0.
a) x< -2
b) x> -1
c) x< 0
d) x<1
Click here to see answer by stanbon(57984)

Question 452282: In the sequence 4, 8, 64,..., each term after the first is the product of all the positive integer factors of the previous term. What is the fourth term of this sequence?
a) 2^36
b) 2^21
c) 2^12
d) 2^11
Click here to see answer by stanbon(57984)

Question 452378: The sum of a student's three scores is 228. If the first is 21 points more than the second, and the sum
of the first two is 3 more than twice the third, what was the first score?
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Question 452748: what value of x will make the rational expression x-3/x+7 undefined?
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Question 452714: x+4/2+x+2/3=x+1/1
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Question 452837: Use a half-angle identity to find the exact value of the expression. sin 112.5 degrees
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Question 453381: linda is going to visit a freind who lives in san luis obispo, which is 300 miles away. on the return trip, she was able to average 20 mi/hr faster, and it took her one hour and a quarter less time. what was her average speed on the way down, and what was her average speed on the way back.
Thanks alot!
Click here to see answer by pedjajov(51)

Question 452689: As x approaches infinity, find limit of (x + sin(exp^x))
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Question 453423: Can someone please help with this question?
Multiply
(6+4i)(8-2i)
Click here to see answer by ptaylor(2052)

Question 453499: Determine a value of b for which b^(1/6) is interger
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