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edjones answered: 7568 problems
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1 solutions
Answer 311710 by edjones(7569)   on 2011-05-24 21:33:13 (Show Source):
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Equations/453560: I dont understand how to plug it into the formula, please help.
A basketball was thrown from one end of a court to the other. It had an initial upward velocity of 48 feet per second. How long did it take for the ball to hit the ground? Use the formula h = vt – 16t2.
1 solutions
Answer 311642 by edjones(7569) on 2011-05-24 16:12:01 (Show Source):
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Geometry_Word_Problems/453568: A survey of flower gardeners showed the following:
45 grew roses 7 grew both roses and tulips 4 grew all three types
16 grew tulips 5 grew both orchids and tulips 9 grew none of these three
13 grew orchids 10 grew both roses and orchids
(a) How many grew only roses?
(b) How many grew both roses and tulips, but not orchids?
(c) How many grew only tulips?
(d) How many grew none of these three or only orchids?
(e) How many flower gardeners were surveyed?
1 solutions
Answer 311633 by edjones(7569) on 2011-05-24 15:45:37 (Show Source):
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Linear-systems/453557: I'm trying to solve this system of equations by graphing:
5x+ y=32
6x+ 7=-8
What is the ordered pair?
1 solutions
Answer 311627 by edjones(7569) on 2011-05-24 15:34:10 (Show Source):
You can put this solution on YOUR website!It's a dot on the graph.
5x + y=32
If x=0 then y=32 and the ordered pair is (0, 32)
if x=1 then y=27 and the ordered pair is (1, 27)
if x=-1 then y=37 and the ordered pair is (-1, 37)
Connect the dots on graph paper and you have a straight line.
Do the same to the 2nd equation (you didn't put in a y after the 7) and draw a line the ordered pair where the lines cross is the answer to the system of equations.
.
Ed
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Probability-and-statistics/453558: A container contains 34 red marbles and 4 green marbles. 4 different marbles are randomly selected from the container.the probability that all of them are red (rounded to three decimal places) equals.
1 solutions
Answer 311624 by edjones(7569) on 2011-05-24 15:18:54 (Show Source):
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Probability-and-statistics/453552: Suppose each of the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 is written on a separate poker chip and placed in a hat. If one of the chips is randomly selected, determine the probability that the chip selected will contain an odd number or a number less than five.
1 solutions
Answer 311621 by edjones(7569) on 2011-05-24 15:12:25 (Show Source):
You can put this solution on YOUR website!There are 4 numbers less than five and 3 odd numbers not already counted.
4+3=7
7/10 the probability that the chip selected will contain an odd number or a number less than five.
.
Ed
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Length-and-distance/453439: A and B are cycling along the circular boundary of a playground. If they start toward each other from the opposite end of the diameter 150 m long with A riding at twice the speed of B, then find the distance traveled by B when two meet.
1 solutions
Answer 311616 by edjones(7569) on 2011-05-24 15:07:09 (Show Source):
You can put this solution on YOUR website!C=pi*d
=150pi m
150pi/2=75pi m. combined distance they travel.
b=b's speed
2b=a's speed
3b=their combined speed
75pi/3=25pi m. distance traveled by b.
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Ed
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Graphs/453449: So;lve each inequality
1.) -61 > b-31
2.) FiFteen is greater than a number minus 7.
3. A number plus 11 is less than of equal to 9.
Solve each problem by either drawing a diagram or writing an equation. Ezplain why you chose the method you did.
1. There are 45 students with in Jasons class. One-ninth of the students have hazel eyes. How many students have hazel eyes?
2. Alice is making casserole snacks. Each snack will be 2 inches by
4 inches. How many snacks will she have if she bakes 4 batches,
each in a 12-inch by 16-inch baking pan?
Choose a strategy to solve each problem.
3. Suppose you buy a basketball at a garage sale for $3.You then
sell the ball to a friend for $4.25.You buy the ball back for $4.75,
and then sell the ball for $5. How much money do you make?
4.
Derek gave Kyle half of his marble collection. Kyle gave Janis
half of the marbles he received from Derek. Janis kept 12 of the
marbles and gave the remaining 16 to Jill. How many marbles
did Derek give to Kyle?
5. Use a calculator or a table of square roots to find each square root to
the nearest tenth.
a. 43
b. 71
c. 56
d. 167
e. 214
f. 1,421
tELL WHEATHER EACH NUMBER IS RATIONAL.
18
3/8
6.831
1 solutions
Answer 311610 by edjones(7569) on 2011-05-24 14:50:34 (Show Source):
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Radicals/453464: could you help me with the following - simplify
sqrt(5)*sqrt(30)
x/sqrt(5)
3sqrt(50)-2sqrt(72) + sqrt(24)
1 solutions
Answer 311605 by edjones(7569) on 2011-05-24 14:40:49 (Show Source):
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test/453488: A random selection of files from a student counseling center revealed the following reasons why college students seek services:
Mental health issues 25
Learning/school issues 15
Relationship issues 5
Other 5
1 solutions
Answer 311603 by edjones(7569) on 2011-05-24 14:37:30 (Show Source):
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test/453525: 1. (3x^2-2x+10)-(3x^2+3x+1)=
2. (y-y^2)-(2y-2y^2)-(3+y)=
3. (2w^3-3w^2+4)-(-2w^2+7w+1)=
4. (-x^7+10x+7)-(9x^7-4x-1)=
5. (x^4+3x^3-2x-19)-(-x^5+4x^4-3x-3)=
6. (2x^2+9x+1)-(x^2+4)=
7.(2a^3-3a^2+a)-(2a^3-3a^2+a+1)=
9.(11s-1)(11s+1)=
10.(8q+3pq)(8q-3pq)=
11.(mn+5n^2)(-5n^2+mn)=
12.(4xyz-2xy)(4xyz+2xy)=
13.(x-y)(x+y)(x^2+y^2)=
14.(4a-3b)(4a+3b)=
15.(kx+5)(kx-5)=
16.(2a^3-b^2)(2a^3+b^2)=
17.(3a+5x)(3a-5x)=
18.(mn-m^2)(-n+m)=
19.(-5k+3b)(b+2k)=
20.(-5k-3b)(-b-2k)=
21.(-2a+3b)(a^2b+b^2a)=
1 solutions
Answer 311600 by edjones(7569) on 2011-05-24 14:34:18 (Show Source):
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Probability-and-statistics/453425: In a certain microwave oven on the high power setting, the time it takes a randomly chosen kernel of popcorn to pop is normally distributed with a mean of 140 seconds and a standard deviation of 25 seconds.
(1)
What percentage of the kernels will fail to pop if the popcorn is cooked for (Round your answers to 4 decimal places. Omit the "%" sign in your response.)
(a) Two minutes %
(b) Three minutes %
(2)
Determine the time that would be allowed in order to get the following percentage of the kernels popped. (Round your answers to 3 decimal places.)
(c) 95 percent seconds
(d) 99 percent seconds
1 solutions
Answer 311568 by edjones(7569) on 2011-05-24 12:43:44 (Show Source):
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Probability-and-statistics/453424: The length of a Colorado brook trout is normally distributed.
(a) What is the probability that a brook trout's length exceeds the mean? (Round your answer to 2 decimal places.)
Probability
(b) What is the probability that a brook trout's length exceeds the mean by at least 1 standard deviation? (Round your answer to 4 decimal places.)
Probability
(c) What is the probability that a brook trout's length exceeds the mean by at least 2 standard deviations? (Round your answer to 4 decimal places.)
1 solutions
Answer 311563 by edjones(7569) on 2011-05-24 12:26:54 (Show Source):
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Probability-and-statistics/453426: The time it takes to give a man a shampoo and haircut is normally distributed with mean 22 minutes and standard deviation 3 minutes. Customers are scheduled every 30 minutes.
(a)
What is the probability that a male customer will take longer than the allotted time? (Round your answer to 4 decimal places.)
Probability
(b)
If three male customers are scheduled sequentially on the half-hour, what is the probability that all three will be finished within their allotted half-hour times? (Round your answer to 4 decimal places.)
1 solutions
Answer 311559 by edjones(7569) on 2011-05-24 12:11:20 (Show Source):
You can put this solution on YOUR website!a)
z=(30-22)/3=2.6667
.0038 probability that a male customer will take longer than the allotted time
.
b)
1-.0038=.9962
.9962^3=.9886 the probability that all three will be finished within their allotted half-hour times.
.
Ed
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Permutations/452129: Hi.
A quiz has five true-false questions and 3 multiple choice questions with 4 options each. How many possible ways are there to answer the 8 questions..
Ive already decided that you should use permutations on this because order does matter, correct?
1 solutions
Answer 310905 by edjones(7569) on 2011-05-21 01:06:59 (Show Source):
You can put this solution on YOUR website!Incorrect. Order doesn't matter.
There are 2 possible ways to answer the t/f questions and 4 possible ways for the multiple choice.
2^5 * 4^3
=32*64
=2048 possible ways.
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Ed
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