Marth

Most popular questions and responses by Marth
1. SS

So... what were the correct answers?

posted on April 26, 2017
2. math

6 topping choices, 2 toppings per pizza: 6 choose 2, which is 6!/(2!4!)

posted on February 21, 2016
3. computer science

4×512MB = 2GB = 2^31 bytes. To address any byte requires 31 bits.

posted on February 21, 2016
4. math

It depends on the distribution of x bar.

posted on February 21, 2016
5. Stats/Probability

"Red OR Yellow" should be a giveaway. Here P(A and B)=0 because a red car is not yellow. P(A)+P(B)=0.12+0.04 = 0.16

posted on February 20, 2016
6. theoretical probability

There are 2 digits (8,9) greater than 7. So every student has a 1/5 chance of choosing a digit greater than 7. With 25 students, the expected number that choose a digit greater than 7 is 25/5 = 5. I would not say the "predicted" number, but rather the

posted on February 20, 2016
7. math

b) He can throw 5 types of pitches each pitch. With 5 pitches, there are 5^5 possible combinations.

posted on May 20, 2011
8. computer science

File sizes are given in bytes, while download speeds are given in bits. 4 GB = 4*1024 MB = 4*1024^2 KB = 4*1024^3 Bytes - 4*1024^3*8 bits. 43.2kbps = 43.2*1000 bits per second. The time required is 795.364s, or 220.935 hours. Note that 43.2kbps is quite a

posted on May 20, 2011
9. algebra

When the world record is less than 3.1, R is less than 3.1. 3.1 = -0.075t + 3.85 Solve for t (in years after 1930).

posted on May 20, 2011
10. Math

The fence forms the perimeter of the rectangle. What is the perimeter?

posted on May 19, 2011
11. math

Is the domain of g equal to A? Is the range of g a subset of B? if both are true, then g maps A to B.

posted on May 14, 2011

What is the length of ? Divide by its length, giving the result a length of 1 - an unit vector.

posted on May 14, 2011
13. math

How many inches are in a foot?

posted on May 14, 2011
14. math

What is the equation for the volume of a sphere? Try googling it.

posted on May 14, 2011
15. math

How could you get only x on the left hand side?

posted on May 14, 2011
16. geometry

It doesn't. 100 is not divisible by 6, nor is 83 divisible by 5.

posted on May 14, 2011
17. Math

13 is a good guess. But when in 2011 do they actually turn 13?

posted on May 14, 2011
18. math geometry

Use Pythagorean Theorem. a^2 + b^2 = c^2, where c is the hypotenuse of the right triangle.

posted on February 14, 2011
19. Math

Find the slope and y intercept of each, and compare. m = (y1-y2)/(x1-x2) to find the slope. y - y1 = m(x-x1) to write the line in slope-intercept form.

posted on February 9, 2011
20. Algebra

You can factor out a 4a from each term.

posted on February 3, 2011
21. MATH

No two numbers add to 50. Therefore we must use at least 3 numbers to get the sum. 25+19+6 = 50: a solution exists for 3 numbers.

posted on January 27, 2011
22. Math Algebra 2

Substitute in the values of p and r. p = 10 r = -4 p^2 - r^2 = (10)^2 - (-4)^2 = ?

posted on January 27, 2011
23. math

(1/8)-(1/8)2+(1/8)3 = (1/8)(1-2+3) by factoring.

posted on January 26, 2011
24. College Algebra

Correct

posted on January 22, 2011
25. beginning algebra

2 + 7/y = 3/5 7/y = 3/5 - 2 y/7 = 1/(3/5 - 2)

posted on January 22, 2011
26. algebra

y - y1 = m(x - x1) The point (x1, y1) is given as (4, -5). The slope m is given as -3.

posted on January 20, 2011
27. algebra

The probability that Jonas gets an orange is 5/11. Given that Jonas gets an orange, the probability that Beth gets an apple is 4/10. So the probability that Jonas gets an orange and Beth gets an apple is (5/11)*(4/10).

posted on January 20, 2011
28. Geometry

Let x and y be the sides. By Pythagorean Theorem, x^2 + y^2 = 600^2. x+y+600 = 1400

posted on January 18, 2011
29. MATH

881/5 = 880/5 + 1/5

posted on January 18, 2011
30. Math

To find the inverse, swap f(x) and x: f(x) = 10x-5 x = 10f^-1(x)-5 Now solve for f^-1(x).

posted on January 18, 2011
31. Math

Elaine takes 2.8s more than Pamela: Elaine takes 2.8s + 52.3s =

posted on January 18, 2011
32. Algebra

x^2-6x-3=0 x = (-b +/- sqrt(b^2-4ac))/(2a) x = (6 +/- sqrt(6^2 - 4(1)(-3)) ) / (2(1))

posted on January 16, 2011
33. Math

Set up a proportion: 8%/56 = 100%/x

posted on January 16, 2011
34. algebra

Plug the values in. h = 50m t = 2s v = 30m/s h+vt+4.9*t^2=?

posted on January 15, 2011
35. physics

V=d/t d=V*t Let t be the time the man is jogging. t-2 is the time the dog is running (since the dog waits 2s). When they catch up with each other displacement will be equal. (4m/s)(t-2)=(1.8m/s)(t)

posted on January 15, 2011
36. math

The difference of two squares is a^2-b^2, for a and b any expression. It should be easy to determine if a polynomial fits that form.

posted on January 15, 2011
37. Preap Physics!!

There are several types of potential energy - spring potential energy, chemical potential energy, etc.

posted on January 11, 2011
38. math

If the relationship is linear, then the line formed by any two points will pass through all points. Find the line through the first two points. Then check to see if the rest of the points are on that line.

posted on January 11, 2011
39. algebra

There are two solutions because of the absolute value sign. x-3x+5 = 7 or x-3x+5 = -7

posted on January 11, 2011
40. algebra 2

yes

posted on January 10, 2011
41. algebra

Jeffs car takes 20% less gas, so it gets 21/(1-0.2) miles per gallon. To drive 570 miles at 21 miles per gallon requires 570/21 gallons.

posted on January 10, 2011
42. algebra 2

You can factor out 4x from both terms.

posted on January 10, 2011
43. math

Teaching makes you learn something well. You've had scientific notation in class, right? Pretend I don't know scientific notation, and explain to me what it is. (That will be your answer).

posted on January 10, 2011
44. MATH 12 HELP!!

There are 15 choose 4 ways to choose 4 toppings. There are 15 choose 2 ways to choose salami, green pepper, and 2 other toppings. P{salami and green pepper) = C(15, 2) / C(15,4).

posted on January 9, 2011
45. Algebra 2

Use synthetic division with -3, then factor the remainder.

posted on January 9, 2011
46. Algebra

Let x be the amount of time of the breakeven point. Then 84+50x = 60x.

posted on January 9, 2011
47. Math: Algebra 2

Try factoring out (2x-3) through grouping.

posted on January 9, 2011
48. algebra

f(x) = 2x^2-3x f(0) = 2(0)^2-3(0) = 0 f(-1) = 2(-1)^2-3(-1) f(2)=?

posted on January 9, 2011
49. algebra 2

The zeroes are 1, 2, and 3, so the factors are (x-1), (x-2), and (x-3). Those are 3 factors for a 3rd degree polynomial, so no other factors are needed. f(x) = C*(x-1)(x-2)(x-3), where C is any constant. f(0) = 18 allows you to determine C.

posted on January 9, 2011
50. math

Let a be the value of "a", e be the value of "e", etc. for i, o, and u. Audacious has a u a i o u = 260. So 2a+i+o+2u = 260. Do the same for the other 4 words; you have 5 equations for 5 variables.

posted on January 9, 2011
51. geometry

The diagonal forms a right triangle with 2 sides of the square. The sides are of equal length, so you can use Pythagorean Theorem to find a side of the square.

posted on January 9, 2011
52. Math

Suppose you buy x shirts to be shipped as one order. What is the cost of the shirts? What is the cost of shipping?

posted on January 9, 2011
53. math analysis

If csc(x) = 30/150, sin(x) = 150/30. That is not in the range of sine.

posted on January 9, 2011
54. Calculus

The derivative of ln(u) is u'/u. Use Chain Rule for the rest.

posted on January 9, 2011
55. Algebra

What variables did you use in part a?

posted on January 9, 2011
56. math

The points at the tail of the skew affect the mean, but the median will remain in the middle of the curve.

posted on January 9, 2011
57. Math

Try writing an equation for each problem. It's easy to make a mistake while glancing over the answer choices.

posted on January 9, 2011
58. Algebra II

x^2+2x-3 factors into (x+3)(x-1). You can divide x^4-5x^3-16x^2+23x-3 by (x+3) and (x-1) using synthetic division, which may be easier.

posted on January 9, 2011
59. Math

Use L'hopital's Rule.

posted on January 7, 2011
60. algebra

-2x-

posted on January 7, 2011
61. Math

The player makes 60% of the shots. So the odds are 60:40 in favor of her making the first shot.

posted on January 6, 2011
62. physics

q1 exerts a force on q in the positive direction, and q2 exerts a force on q in the negative direction. F = k(q1q2)/r^2 is the force exerted on one point charge by another. ΣF = k(q*q1)/(0.24)^2 - k(q*q2)/(0.37)^2 = 24. q and q1 are given. q2=?

posted on January 6, 2011
63. math

a > b = "a is greater than b" a < b = "a is less than b"

posted on January 6, 2011
64. algebra

posted on January 6, 2011

1) Yes, the gravitational force diminishes the farther you get, but by what factor? Check the equation. 2) The speed of the earth keeps it in orbit around the sun. Changing the mass changes the gravitational force, which is also the centripetal force for

posted on January 5, 2011
66. math

Pythagorean Theorem: a^2 + b^2 = c^2 c is the hypotenuse

posted on January 5, 2011
67. math

You gain \$3 if you get a 6, and always pay \$0.90. E[X] = (1/6)*3 - \$0.90

posted on January 5, 2011
68. algebra

posted on January 5, 2011
69. Math

Yes

posted on January 5, 2011
70. algebra

25% was marked off the original price of \$88.

posted on January 4, 2011
71. fraction x whole number

7/10*30 = 7/10*10*3 = 7*3 = 21

posted on January 4, 2011
72. algebra

If |3n+5| = 7, then 3n+5 = 7 or 3n+5 = -7. There are two possibilities for n; find both.

posted on January 4, 2011
73. Math

18 < 20-w 18-20 < 20-w-20 -2 < -w Flip the inequality sign when multiplying by -1. 2 > w

posted on January 4, 2011
74. science

The boiling point and condensation point are identical.

posted on January 4, 2011
75. Math

Numbers are ascending left to right. Is -7 to the left or to the right of -6?

posted on January 4, 2011
76. Math

Yes

posted on January 4, 2011
77. Math

x+8 < 11 x+8-8 < 11-8 x < 3 Inequalities are almost like regular equations.

posted on January 4, 2011
78. math

Ok. Then the perimeter of the triangle is w + l/2 + 5. So w+l/2+5 = 12m, and 2(l+w)=22m.

posted on January 4, 2011
79. Math

Draw a number line, and label -7 and -6.

posted on January 4, 2011
80. math

Let x be the amount of money Beth has. Let y be the amount of money Suzy has. "beth has \$0.60 more than suzy." x = 0.60+y. "together they have \$8.20." x+y = 8.20 Solve the system of equations.

posted on January 4, 2011
81. Math pre-algebra

3/1.65 = 5/x

posted on January 4, 2011
82. Math

This is a simple triangle problem - it may help to draw it out. Draw the height perpendicular to the ground, and the ramp is the hypotenuse. The solution is a proportion. Let x be Pam's height. Then 15/9 = (15+20)/x. x=?

posted on January 4, 2011
83. math

Is the base of the triangle the width of the rectangle, and the height of the triangle half the length of the rectangle?

posted on January 4, 2011
84. Math

x+8

posted on January 4, 2011
85. Math

10-4(5x+1) Distribute the 4 =10-20x-4 =6-20x

posted on January 4, 2011
86. math

Are you referring to the triangle formed by the diagonal of the rectangle and two of its sides? If the dimensions are 8m by 3m, the hypotenuse of said triangle cannot be 5m.

posted on January 4, 2011
87. Math

I appreciate trying to help, but please work out the problems to show how the answer is reached. (It also helps to check your work). Standard form of a line is ax+by = c, with a, b, and c integers. y+2 = (1/2)(x-4) Distribute the (1/2). y+2 = x/2-2

posted on January 4, 2011
88. Pre-Algebra

12+5 > y-5+5 17 > y

posted on January 4, 2011
89. math

The perimeter of the rectangle is 22m. So 2(l+w) = 22. l+w = 11 l = 11-w Also, l^2+w^2 = 5^2 by Pythagorean Theorem. Substitute in l = 11-w: (11-w)^2+w^2=5^2

posted on January 4, 2011
90. algebra

6.67*10^-11 = 6.67/10^11

posted on January 4, 2011
91. algebra

Substitute in x = 35-5y in 4x+9y = 52. 4(35-5y)+9y = 52 Solve for y. Then, plug the value of y into either of the original equations to find x.

posted on January 4, 2011
92. Math

Factoring the tens is a technique for mental multiplication which relies on the fact that 10*n, for any real number n, is easy to compute. 6*2 = 12 is a memory value. 6*20 = 6*2*10 = 12*10 = 120 60*20 = 6*10*2*10 = 12*10*10 = 1200

posted on January 4, 2011
93. Math

2+m < 2 2+m-2 < 2-2 m < 0

posted on January 4, 2011
94. math

(2/5)Q

posted on January 4, 2011
95. math

Let l be the length, and w be the width, of the rectangle. The perimeter of the rectangle is 2(l+w). The perimeter of the triangle is l+w+sqrt(l^2+w^2). sqrt(l^2+w^2) is the hypotenuse of the triangle. There are two equations and two variables. Find l and

posted on January 4, 2011
96. Math/Trig

The period of the parent function is 2pi. The factor of 1/2 applied to x changes the period to 2pi/(1/2) = 4pi.

posted on January 4, 2011
97. Math

t is the price of the movie ticket. We know that 3 tickets is less than twenty dollars, because the student got change back. 3t < 20

posted on January 3, 2011
98. algebra

Given the slope m and the point (x1, y1), use the equation y-y1 = m(x-x1) to find the equation of the line.

posted on January 3, 2011
99. math

8*5*9 = 4*2*5*9 = 4*10*9 = 36*10 = 360

posted on January 3, 2011
100. math

That is an expression. What is your question?

posted on January 3, 2011