# Keonn'a

Newest questions and responses by Keonn'a
1. ## Math

How long will it take for \$2,000 to double if it is invested at 7% annual interest compounded 3 times a year? Enter in exact calculations or round to 3 decimal places. It will take years to double. How long will it take if the interest is compounded

2. ## Math

Suppose you deposit \$2000 in an account with an annual interest rate of 7% compounded quarterly. Use the formula A=P(1+r/n)^n*t and round each answer to 2 decimal places, if necessary. a. Find an equation that gives the amount of money in the account after

3. ## Math

Simplify the expression. Do not assume the variables represent positive numbers. √64a^2

4. ## Math

Use the product property for radicals to simplify the following radical expressions as much as possible. Assume all variables represent positive numbers. Use sqrt(x) for √x and root(x)(y) for x√y. 3√750x^4y^7

5. ## Statistics

The frequency of an electromagnetic wave varies inversely with the wavelength. If a wavelength of 200 meters has a frequency of 800 kilocycles per second, what frequency will be associated with wave length of 400 meters?

6. ## Math

The volume of a gas is inversely proportional to the pressure. If a pressure of 30 pounds per square inch corresponds to a volume of 48 cubic feet, what pressure is needed to produce a volume of 60 cubic feet?

7. ## Statistics

The length a spring stretches is directly proportional to the force applied. If a force of 7 pounds stretches a spring 8 inches, how much force is necessary to stretch the same spring 3 inches?

8. ## Statistics

z varies jointly with y and the square of x. If z=256 when y=−8 and x=−4, find z when x=−3 and y=−4.

9. ## Math

z varies jointly with y and the square of x. If z=256 when y=-8 and x=-4, find z when x=-3 and y=-4.

10. ## algebra

y varies directly with the square x. If y=8 when x=2, find y when x=3.

11. ## Math

divide using the long division method. 6x^3-57x-13/3x+9

13. ## algebra

A company finds that it can make a profit of P dollars each month by selling x patterns, according to the formula P(x)=−0.002x^2+4.5x−800 . How many patterns must it sell each month to have a maximum profit? _______________ patterns What is the maximum

14. ## Math

Suppose a deposit of \$3,500 in a savings account that paid an annual interest rate r (compounded yearly) is worth \$3,910 after 2 years. Using the formula A=P(1+r)^t, we have 3,910=3,500(1+r) ^2Solve for r to find the annual interest rate (to the nearest

15. ## Math

Solve the follwing Equation (3)/(x+2)+(6)/(x^2+2x)=(3-x)/x I got no solution.

16. ## Math

simplify the following, leaving your final in lowest terms (x)/(x+2)+(5-x)/(x)-(4)/(x^2+2x) I got my answer as 3/x is that right?

17. ## Math

please show the steps so I can compare mine. Simplify the following , leaving your final answer in lowest terms. x/x+2+5-x/x-4/x^2+2x I got for my answer 3/x. Is it correct?

18. ## Math

6x+18/3x^2divide by x^2+5x+6/x^3-4x= I got 2(x-2)/x as my final answer. Please explain the steps. Thanks.

19. ## Math

The sum of a number and its reciprocal is 37/6. Find the number.

20. ## Math

Reduce the rational expression to lowest terms. If it is already in lowest terms, enter the expression in the answer box. Also, specify any restrictions on the variable. 6a^4+162a/3a^4-9a^3+27a^2

21. ## Math

Combine the following rational expressions 1/2y-5-30/8y^3-125 Lcm:(2y-5)(4y^2+10y+125) =1*4y^2+10y+25/(2y-5)(4y^2+10y+25)-30/(2y-5)(4y^2+10y+25) =4y^2-10y+25-30/(2y-5)(4y^2+10y+25) =(4y^2+10y-5)/(2y-5)(4y^2+10y+25) Please correct my answer and I know it is

22. ## Math

combine the following rational expressions (2x+2)/(3x^2+6x+3)+x-7/3x^2-3

23. ## Math

Reduce the rational expression to lowest terms. If it is already in lowest terms, enter the expression in the answer box. Also, specify any restrictions on the variable. 6a^4+162a/3a^4−9a^3+27a^2 6a^4+162a/3a^4-9a^3+27a^2 6a^3*a+6*27a/3a^4-9a^3+27a^2

24. ## Math

Reduce the rational expression to lowest terms. If it is already in lowest terms, enter the expression in the answer box. Also, specify any restrictions on the variable. 6a^4+162a^3a^4−9a^3+27a^2

25. ## Math Help me.

Reduce the rational expression to lowest terms. If it is already in lowest terms, enter the expression in the answer box. Also, specify any restrictions on the variable. 25x^2−30x+8/25x^2−16

26. ## Math

Reduce the rational expression to lowest terms. 250y+100xy+10x^2y/125y−5x^2y

27. ## Math : Statistics

The formula h=vt−16t^2 gives the height h, in feet, of an object projected into the air with an initial vertical velocity v, in feet per second, after t seconds. If an object is projected upward with an initial velocity of 112 feet per second, at what

28. ## Math : Statistics

The length of a rectangle is 2 meters more than 2 times the width. If the area is 12 square meters, find the width and the length.

29. ## Math : Statistics

The dimensions of a rectangular photograph are even consecutive integers. The area of the photograph is 224square inches. Find the lengths of each side.

30. ## Math

Factor 9. 6a^4-11a^2-10 10. 2x^2(x-1)+3x(x-1)-2(x-1)

31. ## Math

Factor the following by taking out the greatest common factor. 9a^3b^2+81a^2b^3+108a^3b^3

32. ## Math

Find the third term of (2n+3m)^5 720n^3m^2 I received as my answer.

33. ## Math

From a group of 10 players a team 4 will be chosen for a dodgeball team. How many different teams are possible. 10 nCr 4 =210 but how can I work it out.

34. ## Math

Find the third term of (2n+3m)^5

35. ## Math

Use the Binomial Theorem to write the first three terms of the binomial. (4n−3m)^7

36. ## Math

Use the Binomial Theorem to write the first three terms of the binomial. (x+2y)^10

37. ## Math

Use the the Binomial Theorem to expand the binomial. (3a+4x)^3

38. ## Math

Multiply the following using the FoIL method. (5x-2/5) (5x+1/5) I got 25x^2-3x+2/25

39. ## math

A rectangular box is built by cutting out square corners from a 9" by 11" piece of cardboard, then folding the resulting flaps up to form the height. Let x represent the sides of the square corners being cut out. Express the volume of the box as a function

40. ## Math

The total cost (in dollars) for a company to manufacture and sell x items per week is C(x)=70x+400. If the revenue brought in by selling all x items is R(x)=90x−0.05x^2, find the weekly profit. How much profit will be made by producing and selling 60

41. ## Math

Find the equilibrium price and quantity for the supply and demand equations. d(p)=11,400−8p s(p)=2p The equilibrium price is at \$ ___________ and at a quantity of_____ units. 0 25 0 0

42. ## Math

Find the equilibrium price and quantity for the supply and demand equations. d(p)=11,400−8p s(p)=2p The equilibrium price is at \$ ___________ and at a quantity of_____ units.

43. ## Math

Find the break-even point for the following. Draw your own graph on a piece of paper. Fixed cost = \$20,000 Variables cost = \$13 per item Price = \$23

44. ## Math

Graph the solution set for the of linear inequalities. x−y≤3 x+3y≤3 x≥−2

45. ## Math

Graph the solution set for the of linear inequalities. x−y≤4 x+3y≤4 x≥−5

46. ## math

A manufacturing company finds that they can sell 300 items at \$3.50 per item and 500 items at \$1.50 per item . If the relationship between the number of items sold x and the price per item p is a linear one : Find a formula that gives x in terms of

47. ## Math

A manufacturing company finds that they can sell 300 items at \$3.50 per item and 500 items at \$ 1.50 \$1.50 per item. If the relationship between the number of items sold x x and the price per item p p is a linear one: Find a formula that gives x in terms

48. ## Math

an airplane flying with the wind can cover 660 miles in 2 hours. The return trip against the wind takes 2 1/2 hours.

49. ## Math

It takes a boat 2 hours to travel 26 miles downstream and 4 hours to travel 28 miles upstream.

50. ## Math

Susan invests 3 times as much money at 7% as she does at 4%. If her total interest after 1 year is \$1250, how much does she have invested at each rate?

51. ## Math

The sum of three numbers is 16. Two times the smallest is 2 less than the largest, while the sum of the largest and smallest is 11. Use a linear system in three variables to find the three numbers.

52. ## Math

one number is 3 more than 3 times another. The sum of the numbers is 11. Find the two numbers.

53. ## Math

this a system of equations A merchant decides to mix peanuts worth 5.25 per pound and trail mix worth 2.75 a pound to make a 10 pound mixture worth 4.75 per pound. how many pounds of each should his mixture contain? please help me.

54. ## algebra

solve the system of linear equations by graphing y=3/5x y=-1/5x-4 I need helping it.

55. ## algebra

help me please I do understand I got the wrong answer: Solve the following system of linear equations by graphing 4x-2y=8 and x-y=0 1. 4x-2y=8 -2y/-2=4x/-2+8/-2 y=-2x/1-4 (0,-4) 2. x-y=0 -y/-1=x/-1+0/-1 y=1/-1+0 (0,0)

56. ## Statistics

A coin is tossed 8 times. The probability of getting a head on any one toss is 0.5. To the nearest thousandth, find the probability of getting 4 heads. P(4 heads)=we want 4 of 8 heads 8 nCr 4 (1/2)^4(1-1/2)^8-4 70(1/16)*(1/2)^4 I am lost from here

57. ## Statistics

A coin is tossed 10 times. The probability of getting a head on any one toss is 0.5. To the nearest thousandth, find the probability of getting 4 heads.

58. ## Statistics

A box contains twelve candies, five reds, four greens, and three blues. You select one piece at random, then replace it, then you select another. If P(BG) is the probability of selecting a blue first and a green second, find the following probabilities. a.

59. ## Statistics

You draw a card from a deck of 52 cards twice, each time replacing the card. Find the following probabilities (rounded to the nearest thousandths) of observing: a.) exactly 1 black card. P(1 black card)= b.) exactly 1 club. P(1 club)= c.) exactly 1 two.

60. ## Statistics

A bag contains 5 blue candies and 6 green candies. You randomly pick a piece of candy from the bag, observe the color, then put it back in the bag. You repeat this process 5 times. Find the following probabilities (rounded to the nearest thousandths): a.)

61. ## Statistics

A coin is tossed 8 times. The probability of getting a head on any one toss is 0.5. To the nearest thousandth, find the probability of getting 4 heads.

62. ## Statistics

A box contains twelve candies, five reds, four greens, and three blues. You select one piece at random, then replace it, then you select another. If P(BG) is the probability of selecting a blue first and a green second, find the following probabilities. a.

63. ## Math : Statistics

A box contains seven candies, four of which are green, and three of which are blue. You select one piece at random, then without replacing the first one, you select another. If P(BG) is the probability of selecting a blue first and a green second, find the

64. ## Math

Imagine the following scenario to solve the probability problem. Suppose A and B are independent events with P(A)=1/5 and P(B)=1/6 . Find each of the following. a.) P(A and B)=1/30 b.) P(A or B)= c.) P(not A)= d.) P(not(A and B))= I am confused...Please

65. ## Math

You draw a marble from a jar containing 5 red marbles, 5 green marbles, and 6 blue marbles. Find the probability of drawing a green given that you did not draw a red. P(green | not red)

66. ## Statistics

A box contains 7 pieces of candy: 1 green, 1 blue, and 5 red. You select one piece at random. Find the following probabilities: a.) P(green or red ) = 5/7-1/7=4/7 b.) P(green and red ) =6/7 c.) P (green or blue ) = 1/7-1/7=7 d.) P(not(green or blue) )

67. ## math

Two six-sided dice are rolled at the same time and the numbers showing are observed. Find the following. a. P(sum=8) (5,2) (2,5) 2/36 Please help me with the steps

68. ## Math

A box contains 7 pieces of candy: 1 green, 1 blue, and 5 red. You select one piece at random. Find the following probabilities. a.) P ( P(green or red ) = b.) P ( P(green and red ) c.) P ( P(green or blue ) = d.) P ( P(not(green or blue) ) =

69. ## Math

you selected one card from a deck of 52.what is the probability that is a face card; 12/52 face card or a heart 15/52

70. ## Math

Suppose A and B are events with P (A)=0.25, P(A or B)=0.5, and P (A and B )=0.07. Find each of the following. a. P(B)=0.07/0.25=.28 b. P (not B)= Please help me I need the steps to solve the question

71. ## Math

You select one card from a deck of 52 cards. What is the probability that it is b.) an eight or a spade? c.) a face card?5/26 d.) a face card or a spade? I am lost please help me I do not know where to started. never saw or play a card in my life. show me

72. ## Math

Suppose A and B are events with P(A)=1/6, P(B)=5/6 and P(A and B)=1/12. Find each of the following a. P(AorB)= Formula: P(A)+P(B)-P(A&B) 1/6+5/6-1/12=11/12 b. P(not A) 1-1/6=5/6 c.P(not B)= 1-1/12=11/12 I am lost here can please correct any mistakes I did

73. ## Math

Two six-sided dice are rolled at the same time and the numbers showing are observed. Find the following. a. P(sum=6) (1,6), (6,1) 1/36+1/36=2/36 b. P(sum=3) =1/36 c. P(sum is an odd number) 30/36 d. P(the two dice show same numbers) ? Can you check my

74. ## Math

Two six-sided dice are rolled at the same time and the numbers showing are observed. Find the following. a. (P=sum of 8) 2 dice: (3,5) (5,3), (2,6), (6,2) c. P(sum is an odd number) 2 dice (1,5) (3,3) (5,1) I am lost here please help me with the further

75. ## Statistics

Two six-sided dice are rolled at the same time and the numbers showing are observed. Find the following. a. P(sum=2) b. P(sum=3) c. P(sum is an even number) d. P (the two dice show different numbers)

76. ## Statistics

A baseball coach has a team of 22 players .In how many ways can be select a lineup of 9 players to start the game. ( order matters)

77. ## Statistics

How many different hands of 4 cards can be selected from a standard 52 card deck?

78. ## Statistics

How many two-person committees can be selected from a set of 8 people. 8nCr2=28 I need a reason why it is 28 when you input it into the calculator

The following problem refers to an arithmetic sequence. if a_8=9 and a_16=17, Find the term a_1, the common difference d, and then find a_30. a_n=a_1+(n-1)*d

80. ## Algebra

The following problem refers to an arithmetic sequence. If a_1=4 and d=1 Find a_n and a_35.

81. ## algebra

find the range for the set of numbers: 13950,11250,14600,14300,14600,12200,11150,11300

82. ## Algebra

find the median for the set of numbers. 175,425,625,175 list in ascending order: 175, 425,625 please help me.

83. ## Algebra

Find the sum of the infinite geometric series. 4+1+1/4+.... Sum=a_1/1-r 4/1-4=? r=a_1/a_2 r=4/1=4 a_1=4 I am stuck?Please help me.

84. ## Algebra

find the sum of the infinite geometric series 4+1+1/4+...

85. ## Algebra

find the sum of the infinite geometric series 1/3+1/9+1/27 sum=a_1/1-r

86. ## Algebra

the following problem refers to a geometric sequence: Find S_10 for -1, -1/3, -1/9 r=-1/3/-1=1/3 a_1=-1 a_2=-1/3 a_n=a_1*r^n-1 a_n=-1*1/3^n-1 s_n= Help me.

87. ## Algebra

The following problem refers to a geometric sequence: If a_1=-2 and r=-1.Find s_28. This the formula was given by my instructor: S_n=a_1(1-r^n)/1-r =-2(1-(-1)^28)/1-(-1) =-2*2/2 =-4/2 =-2 where did I go wrong? Can You help me correct it please. Help me

88. ## Algebra

The following problem refers to a geometric sequence. If a_1=-2 and r=-1. Find a_20. a_n=a_1*r^(n-1) a_20=-2*-1^(20-1) I am stuck now please help me.

89. ## algebra

The following problem refers to an arithmetic sequence. If the seventh term is 9 and the fourteenth term is 16, find the term a1, the common difference d, and then find a27 and S27 i am struck please help me....

90. ## Algebra

The following problem refers to an arithmetic sequence. If the seventh term is 9 and the fourteenth term is 16, find the term a1, the common difference d, and then find a27 and S27

91. ## Algebra

4 ∑ i=1(x−1i)= (x-1(1) +(x-1(2)+(x-1(3)+(x-1(4) I am struck I need some help. Did I expand the problem right?

92. ## Algebra

Expand and simplify the following: 4 ∑ i=1(i+3/i+4) (1+3/1+4)+(2+3/2+4)+(3+3/3+4)+(4+3/4+4) 4/5+5/6+6/7+7/8 I am stuck here please help me.

93. ## Algebra

the following problem refers to a geometric sequence. If a_1=5 and r=3, find a_n. a_n=a_1 *r^n-1

94. ## Algebra

The following problem refers to an arithmetic sequence. If a_5=9 and a_14=18. Find the term a_1, the common difference and then find a_24.

95. ## Algebra

The following problem refers to an arithmetic sequence. If a_5=9 and a_14=18. Find the term a_1, the common difference and then find a_24.

96. ## Math

what is 15 plus 1/3? what is 20 plus 1/3 what is 25 plus 1/3?

97. ## algebra

a . a. Slope: X+1 Incorrect Preview x x-intercept: ( ( 0 Correct , 0 ) ,0) y y-intercept: ( 0 , (0, 1 Incorrect ) ) b . b. Slope: -2x-2 Incorrect x x-intercept: ( ( -2 Correct , 0 ) ,0) y y-intercept: ( 0 , (0, -2 Incorrect ) ) c . c. Slope: -2x-2

98. ## algebra

The equation -5x-3y=2 is a linear equation in standard form. From this equation, answer the following:a. Find the y and x-intercepts b. Write this equation in slope-intercept form.

99. ## Algebra

Find the slope of any line for perpendicular to the line through (-4,-5) and (6,-1).