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July 29, 2015

Posts by Helper


Total # Posts: 1,739

maths
P = a + b + c add the three sides P = 8x - 7w + 3x + 9y + 3y + 5w combine like terms
January 21, 2011

math
by the cofunction property cos B = sin A so, if angle B = 33 angle A = ?
January 21, 2011

precalc
Sine is an odd function, sin(-θ)= -sin θ
January 21, 2011

precalculus
2 rads to converts radian to degrees, multiply by 180/pi 2 * 180/pi = (2 * 180)/3.14 = ?
January 21, 2011

algebra
3x + 9y = 18 y = mx + b solve for y, 9y = -3x + 18 y = -3x/9 + 18/9 simplify the equation
January 21, 2011

Math
A = pi r^2 pi = 3.14 r = 5 A = (3.14)*(5^2) A = (3.14)*(25) A = ? m^2 do the multiplication for your answer I don't know what this sentence means. Is this the same as the surface area and it would be 10m?
January 21, 2011

ALGEBRA
I followed that 3 + x(12*4) = 24 multiply 12*4 3 + 48x = 24 subtract 3 from both sides 3 - 3 + 48x = 24 - 3 48x = 21 divide both sides by 48 48x/48 = 21/48 x = 21/48 reduce fraction x = 7/16
January 21, 2011

ALGEBRA
what is 'pemdas'?
January 21, 2011

ALGEBRA
3 + x(12*4) - 24 if that is the problem then, 3 + 48x - 24 48x - 21 48x = 21 x = 21/48 x = 7/16 you can only combine 'like terms' x terms can only be added to other x terms, constant terms can only be added to other constant terms. do you understand?
January 21, 2011

ALGEBRA
I need to see the original problem first to help you. why did you add 48x + 3 to equal 51x? then the 'x' is gone in the next line?
January 21, 2011

Statistics
see 1st link below under 'Related Questions' for this exact problem
January 21, 2011

Taxes
No. Each partner includes his or her share of the partnership's income or loss on his or her personal tax return.
January 21, 2011

5th grade
17,13,27,33,25 put the numbers in order, from smallest to largest 13, 17, 25, 27, 33 the median is the number in the middle so, the median would be 25 for the mean, add all the numbers and then divide the sum by the number of numbers that you added. 13 + 17 + 25 + 27 + 33 = ? ...
January 20, 2011

Algebra -- Help
Train A has a lead of 12 min. RT = D T = time train B T + .20 = time train A 90T = distance train B 80(T + .20) = distance train A 80(T + .20) = 90T 80T + 16 = 90T 16 = 10T T = 1.6 hours train B overtake train A = 1.6 hours
January 20, 2011

geomitry
x = 1st angle 90 - x = 2nd angle 5x - 16 = 3rd angle x + 90 - x + 5x - 16 = 180 solve for x
January 20, 2011

math
what is the figure? square, cube, sphere, etc?
January 20, 2011

algebra
-6m + 3/11 = 77/11 to solve subtract 3/11 from both sides then divide both sides by -6
January 20, 2011

Pre-algebra
A = 1/2 bh multiply both sides by 2 2A = bh to find h, divide both sides by b can you finish this?
January 20, 2011

math
sketch a right triangle A = 55 degrees c = 50 a = unknown (kite height) sin 55 deg = a/c = a/50 = 0.8192 solve for a
January 20, 2011

help math ahhhh
9. 5x + 4y = 1 3x ? 4y = 7 what does ? mean ?
January 20, 2011

mathematics
simplify 2/(x^(-3/2))= 2x^(3/2)
January 20, 2011

AiMS MATH
Natural numbers are the counting numbers, 1, 2, 3, etc Integers are the counting numbers, together with their opposites and zero. whole numbers are the counting numbers without the zero. Rational numbers are the set of all numbers that can be written as quotients, ie, 1/2. ...
January 20, 2011

math
yes, correct good job! :)
January 20, 2011

math
5 * (thirdrt 48) - (thirdrt 750) breakdown the radicals 5 * (3rt 8)(3rt 6) - (3rt 125)(3rt 6) can you do this now?
January 20, 2011

math i need help please
B. what are you having trouble with? did you find r (common ratio)? post what you found for r and the first term so I can understand what part of this you don't understand.
January 20, 2011

MATH I NEED HELP PLEASE!
Reposting a problem in all caps is rude. it's like you are shouting.
January 20, 2011

Analytical Geometry
(sin^2 x)/(sec^2 x - 1) (sin^2 x)/(tan^2 x) (sin^2 x)/(sin^2 x/cos^2 x) (sin^2 x) * (cos^2 x/sin^2 x) cos^2 x therefore, (sin^2 x)/(sec^2 x - 1) = cos^2 x
January 20, 2011

geometry
is this a triangle? is this a right triangle? need more specific info to solve
January 20, 2011

MATH HELP ME NOW PLEASE!!
see your above latest post
January 20, 2011

algebra
w = width 4w + 6 = length P = 2w + 2L 42 = 2w + 2(4w + 6) Solve for w
January 20, 2011

algebra
y = 2x + 5 y = 3x substitute, y = 3x in y = 2x + 5 y = 2x + 5 3x = 2x + 5 solve for x, use x value to find y What do the "?" mean? I see them in most of your posted problems. In this case, the "?" in this problem are part of the answer, so it didn't ...
January 20, 2011

arithmetic
Add 17 + 5 = 22 therefore, 17/18 + 5/18 = 22/18
January 20, 2011

math
G = Glen's present age B = Ben's present age B = 4/7 G G + 15 + B + 15 = 63 substitute, B = 4/7 G G + 15 + 4/7 G + 15 = 63 Solve for G
January 20, 2011

Trig
cos^2 x = 1 take square root of both sides +- cos x = 1 cos x = 1 cos x = -1 for what angle value is cos = 1 and cos = -1 ?
January 20, 2011

physics
should have added above, 1 mi = 5280 feet 1 mi = 1609.344 meters 1 mi/min = 60 mi/hr 1 mi/min = 88 ft/sec 1 mi/min = 26.8224 meters/sec sorry for the confusion. I wish there was a 'do over' button. :)
January 20, 2011

physics
1.00 mi in 4.00 min 1 mile/min = 60 mph 1 mile/4 min = 0.25 mi/min 1. 0.25 x 60 mi/hr = ? mph 2. 0.25 x 88 ft/sec = ? ft/sec 3. 0.25 x 26.8224 meters/sec = ? meters/sec
January 20, 2011

Math
circles that form E? how can a circle form an E? I don't understand
January 20, 2011

alg2
3x − 7 (sqrt x) + 2 = 0 -7(sqrt x) = -3x - 2 divide both sides by -7 (sqrt x) = 1/7(3x + 2) square both sides x = 1/49 (3x + 2)^2 expand the right side you will have a quadratic equation that can be solved either by completing the square or using the ...
January 20, 2011

alg 2
x^3/4 * x^3/4 * x^3/4 = x^9/64
January 20, 2011

5th grade math
w = 78 L = 68 p = 2w + 2L p = 2(78) + 2(68) can you do this now?
January 19, 2011

algebra 2
v^2 + 8v + 6 = 0 this cannot be factored either complete the square or use the quadratic formula to solve
January 19, 2011

algebra 2
quadratic formula x = (-b +- (sqrt(b^2 - 4ac))/2a 5x^2 + 3 = -7x 5x^2 + 7x + 3 = 0 a = 5, b = 7, c = 3 plug these into the formula and solve
January 19, 2011

alg. 2
2.25 + .15x = 1.50 + .18x solve for x
January 19, 2011

math
incomplete problem
January 19, 2011

Junior Math
(t^2-1)/(t^2+7t+10) - (2t+4)/(t^2-t-6) factor the denominators first (t^2-1)/(t+2)t+5) - (2t+4)/(t-3)(t+2) LCD is (t+2)(t+5)(t-3) Now, can you combine over the LCD?
January 19, 2011

ALGEBRA
x + 2y - 4 = 0 x + 2y = 4 to find x-intercept, y = 0 x + 2(0) = 4 x = 4 x-intercept = (4.0) slope intercept form (which you got right above) y = mx + b for Line A is y = -1/2 x + 2 slope m = -1/2 If two lines are perpendicular, the slope of one is the negative reciprocal of ...
January 19, 2011

math
5/4 x + 1/8 = 5/8 + x 5/4 x = 4/8 + x multiply both sides by 8, (LCD of 4 and 8) then solve for x
January 19, 2011

math
you need to use parentheses 5/4x1 divided by 8x = 5/8 + x ? what is "4x1"?
January 19, 2011

Algebra 1
you're very welcome :)
January 19, 2011

Algebra 1
f(x) = x^2 + 3 f(5) = 5^2 + 3 f(5) = ? 5^2 = 5 x 5 = 25 f(5) = 5^2 + 3 f(5) = 25 + 3 f(5) = 28
January 19, 2011

Algebra 1
No, f(5) does not = 10 f(x) = x^2 + 3 f(5) = 5^2 + 3 f(5) = ? 5^2 = ? 5^2 + 3 = ? show me how you got 10
January 19, 2011

Algebra 1
f(x) = x^2 + 3 f(2) = 2^2 + 3 f(2) = ? 2^2 = 4 f(2) = 2^2 + 3 f(2) = 4 + 3 f(2) = 7 the answer for f(2) is 7 when x = 2, the function value = 7 now, you do the other one
January 19, 2011

Algebra 1
just plug in the values for x and solve f(x) = x^2 + 3 f(2) = 2^2 + 3 f(2) = ? f(x) = x^2 + 3 f(5) = 5^2 + 3 f(5) = ?
January 19, 2011

math 5th grade
5/5 * 2/3 = ? 100, 10, 1, 1/10
January 19, 2011

Math
I = PRT 525 = 3500 *.06 * T Solve for T (time) this is simple interest
January 19, 2011

rectangular area
you're welcome
January 19, 2011

rectangular area
A = Lw 240 = 24w w = ?
January 19, 2011

To helper
I do when they post more than one of the same type problem, but I understand and will only set up for now on
January 19, 2011

Cylinder Height
r = radius 3r = height (h) SA = 2(pi)(r)(h) + 2(pi)(r^2) SA = 2(pi)(r)(3r) + 2(pi)(r^2) SA = 6(pi)(r^2) + 2(pi)(r^2) SA = 8(pi)r^2 402 = 8(pi)r^2 402 = 8(3.14)r^2 402 = 25.12r^2 16.00318 = r^2 rounding 16.00318 = 16 16 = r^2 r = 4 height = 3r = 3(4) = 12
January 19, 2011

algebra
|x + 5| > 9 remove absolute value sign x + 5 > 9 x > 4 -x - 5 > 9 -x > 14 when you divide by a negative, reverse the sense of the inequality x < -14 x > 4 x < -14
January 19, 2011

math
(3xy - 10) - (xy + 5) 3xy - 10 - xy - 5 2xy - 15
January 19, 2011

TO Helper
I figured those were yours. I'm going through those now (and others). I try to help everyone I can. I don't exactly understand the donut problem either because the equation doesn't seem to work if all donuts were sold. I'm hoping REINY or another math tutor ...
January 19, 2011

TO Helper
the screen name "Anonymous" belongs to anyone who left the name field blank, so I have no idea which posts are yours. I scan all problems and help where I can. I am not a tutor so I only help on problems I am sure of.
January 19, 2011

MATH ALGEBRA
2x- 3y + 30 = 0 ? to find x and y intercepts, put equation in the form ax + by = c x intercept = (c/a, 0) y intercept = (0, c/b) to find x-intercept, y = 0 2x - 3(0) = -30 2x = -30 x = -15 x intercept = (c/a, 0) x intercept = (-15, 0) to find y-intercept, x = 0 2(0) - 3y = -30...
January 19, 2011

4th Grade
2/9 * 36 = 72/9 = 8
January 19, 2011

Algebra 1
-0.2x < -10 divide both sides by -0.2 when dividing by a neg, reverse the sense of the inequality x > 50
January 19, 2011

algerbra
yes, you are correct
January 19, 2011

alg. 2
x^2 - 16x + 4 = 0 x^2 - 16x = -4 (-16^2)/4 = 256/4 = 64 x^2 - 16x + 64 = -4 + 64 x^2 - 16x + 64 = 60 (x - 8)^2 = 60
January 19, 2011

MATH_ALGEBRA
you're welcome :)
January 19, 2011

MATH_ALGEBRA
(1) F + 1000P = 32 (2) F + 3500P = 44.50 you have to solve these 2 equations simultaneously By elimination method, to eliminate F, multiply one of the equations by -1 -1(F + 1000P = 32)= -F - 1000P = -32 Now ADD these two equations together -F - 1000P = -32 F + 3500P = 44.50 0...
January 19, 2011

MATH-ALGEBRA
y = 2/5x - 3 P (0,5) parallel lines have equal slopes slope intercept form of an equation y = mx + b m = slope, b = y-intercept parallel to y = 2/5x - 3, and through P(0, 5) m = 2/5 y intercept = 5 so, the equation would be D. y = 2/5x + 5
January 19, 2011

math
A = B + 5 B = C + 7 C = THE DIFFERENCE BETWEEN 13 AND 9 D = A - B C = 13 - 9 = 4 B = C + 7 = 4 + 7 = 11 A = B + 5 = 11 + 5 = 16 D = A - B = 16 - 11 = 5 A = 16 B = 11 C = 4 D = 5
January 19, 2011

algebra
quadratic formula x = (-b +- (sqrt(b^2 - 4ac)))/2a 1) x^2 = 9 x^2 - 9 a = 1, b = 0, c = -9 x = 0 +- (sqrt(0^2 - 4(1)(-9)))/2(1) x = + - (sqrt(0 + 36))/2 x = +- (sqrt36)/2 x = +- 6/2 x = +- 3 x = 3, -3 you try number 2
January 19, 2011

math
Supplementary angles: two angles whose measures total 180 deg x = 1st angle 3x - 4 = 2nd angle x + 3x - 4 = 180 solve for x to find the angles
January 19, 2011

algebra
for michele (3x-2)/(5)-2<(2x-3)/(2) multiple both sides by LCD of 10 2(3x - 2) - 20 < 5(2x - 3) 6x - 4 - 20 < 10x - 15 6x - 24 < 10x - 15 -9 < 4x -9/4 < x x > -9/4
January 19, 2011

Math
if this your problem | 1 - 4x/3 | < 3 remove absolute value sign 1 - 4x/3 < 3 and -1 + 4x/3 < 3 1 - 4x/3 < 3 -4x/3 < 2 -4x < 6 x > -6/4 x > -3/2 -1 + 4x/3 < 3 4x/3 < 4 4x < 12 x < 3 so solution is -3/2 < x < 3
January 19, 2011

math
from above .03 = value of mixture this should be x + 100 = mixture total number of oz
January 19, 2011

math
x = number oz of cheaper tea .02x = value of cheaper tea 100 = number oz of better tea .05 * 100 = 5.00 = value of better tea .03 = value of mixture .03(x + 100) = value of mixture .02x + 5.00 = .03(x + 100) .02x + 5.00 = 3.00 + .03x 2.00 = .01x x = 200 200 oz of .02 tea
January 19, 2011

Intermediate Algebra
V = 2(pi * L^2) or V = 2pi * 2L^2
January 19, 2011

algebra
(4/(x + 2) - 4/x)/2 = 1 rewrite as (4/(x + 2) - 4/x) * 1/2 = 1 4/(2(x + 2)) - 4/2x = 1 4/(2x + 4) - 4/2x = 1 LCD 2x(2x + 4) (8x - 4(2x + 4))/(2x(2x + 4)) = 1 multiply both sides by 2x(2x + 4) 8x - 4(2x + 4) = 2x(2x + 4) 8x - 8x -16 = 4x^2 + 8x -16 = 4x^2 + 8x 4x^2 + 8x + 16 = ...
January 19, 2011

math!!!
g(x) = 2x^2 + x - 1 The degree of an equation that has not more than one variable in each term is the exponent of the highest power to which that variable is raised in the equation. b. 2 is the answer
January 19, 2011

math!!!
h = -6(t - 2.5)^2 + 38.5 plug in a few values for t when t = 1, h = 25 when t = 2, h = 37 when t = 2.5, h = 38 when t = 3, h = 37 you try, what do you think the answer is
January 19, 2011

Algebra
x = each base vertex angle = 1/2x + 10 solve x + x + 1/2x + 10 = 180
January 19, 2011

Algebra II
3/x^3 divided by 1/x^2 is this your problem? instead of dividing, invert and multiply 3/x^3 * x^2/1 = 3x^2/x^3 = 3x^-1 = 3/x
January 19, 2011

algebra
8/26 = m/13 cross multiply means denominator of 1st * numerator of 2nd numerator of 1st * denominator of 2nd 26M = 104 M = 4
January 19, 2011

algebra
11T/28-T / 4 = 1 rewrite problem 11T/28 - T * 1/4 = 1 11T/(4(28 - t)) = 1 11T/(112 - 4T) = 1 11T = 112 - 4T 15T = 112 T = 7.47
January 19, 2011

advance algebra
X=smaller number y= bigger number y - x = 192 9x = bigger number 9x - x = 192 8x = 192 x = 24 smaller number bigger number = 9x = 9(24) = 216
January 19, 2011

calculus
A = Lw 25 = Lw w = 25/L P = 2w + 2L P = 2(25/L) + 2L P = 50/L + 2L
January 19, 2011

Algebra 1
5x + y = 5x + (3x − 11) = 13. where are you getting these problems? there is no way to solve the way you have written this. copy the problem exactly from your book
January 19, 2011

Algebra 1
no way to solve this
January 19, 2011

math
cannot solve either as separate equations
January 18, 2011

math
see your other post
January 18, 2011

ALGEBRA
4 + x(10 - 8) 4 + 10x - 8x 4 + 2x 2x = -4 x = -2
January 18, 2011

Algebra 1
5y + 4x = -41 what are you solving for? copy the complete problem from your book there isn't anything to solve for above, unless 5y + 4x = -41 5y = -41 - 4x y = (-41 - 4x)/5 4x = -41 - 5y x = (-41 - 5y)/4 is this what you want there is nothing else to solve for
January 18, 2011

algebra
don't understand what you need done repost
January 18, 2011

MATH
881/5 = 176 1/5
January 18, 2011

Algebra 1
5y + 4x = -41 what are you solving for?
January 18, 2011

Algebra 1
incomplete problem try again :)
January 18, 2011

Geometry
a + b + c = 1400 a + b + 600 = 1400 a + b = 800 using Pythagorean theorem a^2 + b^2 = 600^2 a + b = 800 a^2 + b^2 = 600^2 solve simultaneously I got a = 258.579 b = 541.421 or a = 541.421 b = 258.579
January 18, 2011

math(algebra 1)
2) you are correct x - y = 4 add + y to both sides x - y + y = 4 + y x = 4 + y
January 18, 2011

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