# it is an equation 9b- 4b+ 3b= 16 please write it step by step

58,438 questions, page 332
1. ## Statistics

Is is possible for the regression equation to have none of the actual (observed) data points located on the regression line?

asked by Julia on December 2, 2012
2. ## Math

I don't know how to solve this equation. cos(30) = x / 6 How would I solve this to find the missing side of a 30-60-90 triangle?

asked by John on May 25, 2018
3. ## geometry

in slope-intercept form, what is the equation of the line passing through (6,22) and parallel to the line joining (11,3) and (2,6)

asked by Anonymous on May 26, 2011
4. ## Logs

Solve the equation and check your solutions. Note any extraneous answers. log(3x-13)=2 - log x

asked by Kasey on April 26, 2016
5. ## math

Find the standard form of the equation of the circle with the given characteristics. Center: (5, -2); point on circle: (-3, -4)

asked by mary on May 26, 2018
6. ## calculus

the curve with equation 2(x^2+y^2)^2=9(x^2-y^2) is called a lemniscate. find the points on the lemniscate where the tangent is horizontal.

asked by Lee on October 30, 2011
7. ## Maths

The sketch shows a curve with equation y=ab^x where a and b are constants and b>0. The curve passes through the points (0,3) and (2,12). Calculate the value of a and b. Thank you.

asked by Julie on April 19, 2017
8. ## precalculus

can you please check my work? 7. Find the equation of the parabola y=ax2+bx+c that passes through the points(0,6),(-2,2), and(3,9/2). y=ax2+bx+c 6=a(0)2+b(0)+c 2=a(-2)2+b(-2)+c 9/2=a(3)2+b(3)+c 6=c 2=4a+(-2b)+6 9/2=9a+3b+6 -4=4a-2b -3/2=9a+3b a=-1/2, b=1

asked by Anonymous on December 3, 2016

Derive the rocket equation M(dV/dt) = -u(dM/dt)for a rocket in the (constant) gravitational field near the surface of the Earth.

asked by Eduardo on March 7, 2011
10. ## Differential Equations

x dy/dx + y = 1/y^2, solve using bernoulli's equation. i got to du/dx + (2u)/x = 2x(u)^(-1/2). the u^(-1/2) is obviously a problem if im going to solve it using an integrating factor. if that is not what you yourself have gotten to then please show me my

asked by Bryant on September 25, 2012
11. ## Math

Suppose that y varies inversely as t he cube of x. If y is 1/2 when x is 2 , find the constant of variation and variation equation

asked by Mary on August 28, 2014
12. ## Math

Find the equation that represents the linear function described in the table below. What are the x- and y-intercepts? x values / -8, -4, 4, 6, 12 y values / -4, -3, -1, -0.5, 1

13. ## math

Given 3x-2y=6, how do i find the area of triangle OPQ? I know I have to graph the equation first but I don't even know how to find the points?

asked by ali on August 28, 2008
14. ## college algebra

Solve the logarithmic equation. Log x +log2x = 4 Wouldn't this be no solution because log x is undefined?

asked by Deb on April 24, 2013
15. ## math

Please help me to find an equation for the tangent to the curve xsin2y=ycos2x at the point (phi/4, phi/2)

asked by deel on August 13, 2012
16. ## Math

Solve the equation 13r = 3/7. Express your answer in the simplest form. a r = 91/3 b r = 7/39 c r = 39/7 d r = 3/91 Is c the correct answer.

asked by Miya on April 8, 2015
17. ## trig identites

since sin2x+√3cos2x=2sin(2x+60) find the general solution for the equation sin2x+√3cosx=0 thank you

asked by phillip on May 10, 2013
18. ## analytical geometry

the points M(6,-8) and E(8,6) are on a circle with radius 10 units. Determine the equation of the line equidistant from points M and E

asked by Priya on January 24, 2012
19. ## Maths

The difference between the two roots of the quadratic equation x^2+ax+b=0 is 32 and the larger root is 3 times the smaller root. What is the value of a and b ?

asked by CHRIS on October 19, 2013
20. ## Algebra

If a circle of radius 5 is made to roll along the x-axis, what is the equation for the path of the center of the circle?

asked by coried on August 11, 2009
21. ## Math

Use the discriminant to determine how many real-number solutions the equation has. Problem 1 w2 - 2w + 2 = 0 A) 2 B) 1 C) 0 Problem 2 1 - 7a2 = -7a - 2 A) 2 B) 1 C) 0

asked by Sharee on August 5, 2010
22. ## math

rewrite the given equation using the substitutions x=r cos theta and y=r sin theta. Simplify your answer. x^2+y^2+3x=0

23. ## Calculus

Find the slope intercept equation of the line with the following properties :parallel to the line x=-1; containing the point( -7,2)

asked by Crystal on October 26, 2012
24. ## Calculus IVT

The function f is continuous on the closed interval [0,6] and has values that are given in the table above. The equation f(x)=3 must have at least two solutions in the interval [0,6] if k= ? A. 0 B. -1 C. 1 D. 2 E. 3

asked by jennifer on January 18, 2011
25. ## Calculus

Find the slope-intercept equation of the line with the following properties: parallel to the line x=-1;containing the point (-7,2)

asked by Crystal on October 26, 2012
26. ## MATH

how would you solve this equation? the measurement of a triangle is 2m more than the base. The area is 17.5m^2. Find the length of the base.

asked by Hannie on July 13, 2008
27. ## Calculus

If f(2)=3 and f'(2)=5, find an equation of a. The tangent line b. The normal line to the graph of y=f(x) at the point where x=2 So I plotted (2,3) and (2,5)...but that's not getting anywhere... Thanks

asked by Anonymous on February 24, 2010
28. ## algebra

Line JK passes through points J(–4, –5) and K(–6, 3). If the equation of the line is written in slope-intercept form, y = mx + b, what is the value of b?

asked by Tamera on November 8, 2019
29. ## algebra

how do you solve for w in a bmi equation, if only height (h=65 inches)is known and w (weight) is what is to be solved for? Bmi=703w/h^2

asked by Missy on October 4, 2013
30. ## algebra

Suppose you want to add a sprinkler system, and the location of one section of the sprinkler line can be described by the equation .

asked by frustrated on February 15, 2008

what is the net ionic equation for the reaction between a strong acid and a strong base? what does it mean by this question?/ (: thanks.

asked by yvette on March 4, 2013
32. ## Algebra

Solve the equation. 2log3 y = log3 4+ log3 (y+8) Here's what ive got take out the logs and say y^2= 4+ y +8 which simplifies to (y^2)-y=12 how do i simplfy the y?

asked by Kenya on April 30, 2011
33. ## precal : conics

find the equation of a parabola with vertex on line y = 2x, axis parallel to the y axis and passing through (3/2, 1) and (3, 4).

asked by rhinechilde on November 15, 2015
34. ## math

x=((30)/(5.15+1.84i))+(5.15+1.84i) i= square root of (-1) final answer of x=10.3 please show me how you drive this equation to get the 10.3. thank you so much.

asked by layth on September 21, 2010
35. ## math

2x(x-2)=x+3 2x-2=x+3 What error has been made in solving this equation, and what could be done to aviod this error? The 2x was NOT multiplied by the contents of the parenthsis. Should have been 2x2 - 4x

asked by cheryl on March 19, 2007
36. ## pre-calculus

how to find the equation of a parabola given foci(-7,-17), (-7,17 ),the absolute value of the difference of the distances of any point from the foci is 24

asked by Moana on August 12, 2017
37. ## Algebra

How do you find the excluded value if there is another variable or number in the denominator? Such as the equation 12(a) over a squared minus 3(a) minus 10?

asked by Haley on May 19, 2014
38. ## math

find the equation of the path of a point that moves so that its distance from (5, 0) is five~fourths of its distance from the line x=16\3

asked by austin on May 8, 2016
39. ## calculus

solve the following equation Log1/3(x2+x)-log1/3(x2-x)=2 the 1/3 should be lowered and the (x^2-x) should be higher. Can someone tell me what tools to use to make them like this when posting? x= ?

asked by Kyrstal on January 1, 2013
40. ## Pre-Calculus (absolute values)

I want to find the invariant points( points that are fixed) algrebraically of x^2 - 25 and its reciprocal. Would I set up my equation like this? 0 = x^2 -25 or 0 = 1/ x^2 - 25 Thanks

asked by Lucina on May 12, 2015
41. ## math

P (5,) and Q (-1, 2) are points on a straight line. Find the equation of the perpendicular bisector of PQ: y = mx+c how to find missing

asked by kudu on March 14, 2015
42. ## numerical analysis

find the smallest positive root of the equation f(x)=2sinx+x-2=0 using the false positive method.

asked by rosie on September 5, 2015
43. ## Geometry

1. What is the equation of the circle with center (-4,-3) that passes through the point (6,2)? A. (x-4)^2+(y-3)^2=25 B. (x-4)^2+(y-3)^2=125 C. (x+4)^2+(y+3)^2=25*** D. (x+4)^2+(y+3)^2=125 I think the answer is C but I'm not sure. Can someone help tell me

asked by Crystals on May 10, 2017
44. ## Calculus

Find an equation of the plane. The plane that passes through the point (−1, 2, 1)and contains the line of intersection of the planes x + y − z = 4 and 4x − y + 5z = 4

asked by john on January 31, 2014
45. ## Chemistry

A system is represented by the following equation: 2A(aq) + B(aq) --> 3C(aq) At equilibrium, [C]=0.6 M. Calculate the value of K if initially 1 mol of A and 2 mol of B were placed in a 1 L flask.

asked by Sandra on May 11, 2012
46. ## math

determine the equation of the line passing through the point (-4, 3) and parallel to the line segment joining A(5, -2) and B(3,4)

asked by Anonymoussssss on May 27, 2012
47. ## calculus

Hello. I need help finding the open intervals of this equation: f(x)=3x^2-12 I already took the derivative of it by using the derivative test and I got 2,-2 as critical numbers

asked by Mandy on January 28, 2008
48. ## ALG- timed

Find the equation of the circle that passes through the point P(1, 7) and whose center is the point C(4, 3). Then sketch its graph.

asked by K- ASAP on May 7, 2014
49. ## College Algebra

Find the slope intercept equation of the line with the following properties: Parallel to the line 5x+2y=1; containing points (-5,4)

asked by Mountain Scott on August 24, 2012
50. ## Math

Given that the points (16, −5) and (−40, 16) lie on a line, what is the equation of the line? Select two answers. A. y=−38x+1 B. y=−83x+1 C. y+5=−38(x−16) D. y+5=−83(x−16)

asked by Buddy on November 8, 2019
51. ## Chemistry

What would be the equation for NaOH + H2SO4 be? Would the porducts be H2O + NaHSo4 or H2O + Na2SO4? If it's the second one, which I think it is, where does that extra H go?

asked by Macy on October 13, 2015
52. ## math

Suppose you want to add a sprinkler system, and the location of one section of the sprinkler line can be described by the equation. Y= -1/2x-4 x y (x,y) -1 -2 -4 2 8

asked by scooby9132002 on May 31, 2009
53. ## Trig

Prove that the equation is an identity: cot4theta - csc4theta = -cot sq theta - csc sq theta How ??

asked by Don on December 17, 2011
54. ## math

Find the variation constant and an equation of variation if y varies directly as x and the following conditions apply.

asked by jay on February 21, 2016
55. ## Chenistry

How many moles of PbO are needed to produce 4 moles of Pb3O4? Given the equation 6PbO+O2 = 2Pb3O4

asked by Artie on January 19, 2011
56. ## basic algebra

Graph the line passing through the given point and having the given slope-intercept form of the equation of the line if possible. (1,-2),m=-1/2

asked by Camille Byrne on July 29, 2011
57. ## Math

Use properties of equality and numbers to solve each equation for x. A. 7+3x = 5x + 13 how am i suppose to solve i am kind of confused?!?!

asked by EmilyMay on April 3, 2012
58. ## Algebra

I did this problem, but would like to compare answers please if someone can help. Thanks! Find the equation of the line parallel to the line 3x + y = 5 and containing the point (4, – 2).

asked by Jamie on June 25, 2009
59. ## math

Find the equation of a parabola where the vertix is at origin and the parabola opens to the left and passes through (-1,2).

asked by pallavi on March 15, 2016
60. ## math cont'd

how would you solve this equation? the measurement of a triangle is 2m more than the base. The area is 17.5m^2. Find the length of the base.

asked by Hannie on July 13, 2008
61. ## maths trigonometry

solve the equation (2cos theta +1)(tan theta minus 1)=0 for all values between 0 and 2pii.

asked by lughano on March 3, 2017
62. ## Chenistry

How many moles of PbO are needed to produce 4 moles of Pb3O4? Given the equation 6PbO+O2 = 2Pb3O4

asked by Artie on January 19, 2011
63. ## Algebra 1

A line segment has endpoints j ( 2, 4 ) and l ( 6, 8 ). The point k is the midpoint of jl. What is an equation of a line perpendicular to jl and passing through k?

asked by Jaay on June 1, 2014
64. ## Alebra 2

If the system below were written as a matrix equation, by which matrix could you multiply both sides to obtain a solution? 4x + 6y = 24 5x + 8y = 40

asked by True on July 30, 2012
65. ## Algebra 1

A line segment has endpoints D (3, 2) and E (-3, -2). The point F is the midpoint of DE. What is an equation of a line parallel to DE and passing through F?

asked by Homura on June 1, 2014
66. ## Math - Coordinate Geometry

Find the equation of the line which passes through the point (6, -4) and is parallel to to the line 2x-3y+3=0. Please show working out as well, thanks.

asked by Anonymous on December 16, 2016
67. ## Math

determine weather 10 is the solution of the equation x+10=36 is 10 the solution no use multiplcation principle 10x=-90 -9 3[7-9{6-2)]= -87 find -x when x=-62/83*= 62/83

68. ## algebra

find the equation in slope-intercept form for the line that contains the given point and that is parallel to the given line. M(-5,2); -3x+8y=24

69. ## algebra

Solve the equation by a method of your choice: 6x2 + 5x + 1 = 0 If there are two solutions, separate the solutions by a comma.

asked by nikki on June 6, 2011
70. ## calculus

How do you estimate derivatives when you don't know the actual equation of the line on the graph, but you have just a picture of the graph?

asked by fr on October 3, 2011
71. ## maths trigonometry

solve the equation (cos theta +1)(tan theta minus 1)=0 for solution between 0 and 2pii.

asked by lughano on March 3, 2017
72. ## Math

Rewrite the given equation using the substitutions x=rcos(theta) and y=rsin(theta). Simplify your answer.

asked by Tommy on May 9, 2011
73. ## Chemistry

Consider the following generic chemical equation: 2W + 3X ? 3Y + Z When 5 units of W and 6 units of X are allowed to react, the limiting reactant would be: a)W b)x c)Y d)Z

asked by Anonymous on December 6, 2011
74. ## Trigonometric

tan^2 x − 7 tan x − 8 = 0 Use inverse functions where needed to find all solutions of the equation in the interval [0, 2π).

asked by Diana on March 16, 2015
75. ## math

An equation of the line in slope intercept form that passes through the point (-9, -1) and is perpendicular to the line y = 3x + 17? Please help...

asked by thomas on November 21, 2011
76. ## Analytic Geometry

Find the equation of the parabola through (-15/4 ,2) and (0,-1) whose axis is parallel to the x-axis and the latus rectum equal to 4

asked by xavier on February 11, 2013
77. ## algebra

Find all roots of the equation z^5 = i, i.e. ﬁnd the ﬁve values of i^1/5 and show them on an Argand diagram.

asked by Carrolyn on May 27, 2014
78. ## algebra

Find the equation for the graph of the path of a point​ P(x,y) that moves such that​ P(x,y) is the same distance from the point ​(14​,0) and the​ y-axis.

asked by jacob on December 3, 2016
79. ## Last equation question

where would I graph this?? once again I hate fractions and equations... graph the equation x=7/2 can someone help me figure this out thanks last question of the day..

asked by Kathy on October 8, 2009
80. ## math

Determine the values of k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros , check these values in the original equation

asked by Annie on January 25, 2012
81. ## math

find an equation in slope-intercept form of the line that has slope 2 and passes through point A(-8,7)

asked by lili on December 19, 2012
82. ## trig

How many solutions does the equation cos(x) + cos(−x) = 0 have if 0 < x < 2pi? (Radian measure is assumed for x.) (A) infinitely many (B) 1 (C) 2 (D) 3 (E) None of the above.

asked by dat on May 8, 2011
83. ## calc

The equation of the tangent line to y=f(x) at a=2 can be written in the form y=mx+b where f(x) =4sinx/4sinx+6cosx i already got 3/2 for m but i cant seem to find out how to get the value of b?

asked by sonia on May 9, 2008
84. ## chemistry

Is this equation correctly balanced? If not why. Al2S3+H2O----> Al2S3+3H2O---->Al2(SO)3+3H2

asked by What? on October 22, 2012

Fe3+ + I1- ¨ Fe2+ + I2 1. Balance the equation 2. Which element is being oxidized? 3. Which element is the reducing agent?

asked by Ellie on February 20, 2013
86. ## college math

can you build or generate at least 5 pythagorean triples using one of many formulas? and can u verify each one of them in the pythagorean theorem equation

asked by Quita on September 10, 2012
87. ## ALGEBRA 2

The formula for determining simple interest is I = prt. Which equation shows the formula solved for t?

asked by KELR on January 12, 2012
88. ## math

How do you use RECIPROCALS to solve equations without variables. I do not want the answer to the equation. I want the steps to solving it with RECIPROCALS. Thanks! ex. 37.6 + 2.5 ----------- 48(7.8 - 10.5)

asked by Lallie on February 23, 2009
89. ## math

Determine the values of k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros , check these values in the original equation

asked by Annie on January 25, 2012
90. ## Math

The sum of three consecutive numbers is 66.Form an equation to represent this information and find these numbers

asked by Hazel on June 7, 2016
91. ## Statistics

The least absolute deviation line equation for the data in the table is m = 0.1 x + 2.9 X 1,6,0.5,4,7.5,12,10,11 y 3,2.5,8,1,1.5,9,13,4 What is the sum of the absolute deviations?

asked by BoB on December 12, 2018
92. ## Vectors

Determine two other (non-trivial) points on the line that passes through P(5, 6, -2) and is parallel to the line with equation Vector r = (2,-3,4) + t(1,1, -3), t∈R.

asked by Jim on October 21, 2018
93. ## algebra

Give the equation of the line that passes through point (5, 1) and is parallel to the line y = 3x – 1. I am so lost. I have no clue how to do this. Can anyone please help?

asked by sabrina on February 21, 2010
94. ## Math

Find an equation of the hyperbola with its center at the origin. vertices:(3,0)(-3,0) Foci (5,0)(-5,0) My answer was x^2/3 - y^2/22 = 1. I do not know how to find a.

95. ## Maths

Solve 6x^2-17x+3=0 What is the smaller answer ? Answer -1000 if there is no real value of x that solves this equation

asked by Billy Bob Joe on May 1, 2018
96. ## Math

I need help in finding the vertex of a parabola using an equation in this form: Ax^2 + Bx+C I have a test on this tomorrow. For example: 3x^2 +1x - 2 How would I find the vertex in this?

asked by Clair on December 8, 2009
97. ## Math

In the interval 0 'less than or equal to' x 'less than or equal to' pi find the values that satisfy the equation cos 2x - sin x = 0

asked by Laura on August 19, 2016
98. ## math

Which equation shows the correct use of power of products property? a) (2x^5y^2)^3 = 6x5y^2 b) (2x^5y^2)^3 = 6x^15y^6 c) (2x^5y^2)^3 = 8x^8y^5 d) (2x^5y^2)^3 = 8x^15y^6

asked by victoria on September 11, 2013
99. ## chemistry

How many grams of HCl are produced according to the following equation, H2 + Cl2 = 2 HCl, when 4.0 g of hydrogen reacts completely?

asked by HElp on October 20, 2011
100. ## statistics

Find both the -intercept and the -intercept of the line given by the equation . Round your answers to decimal places.

asked by LJ on October 7, 2017