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October 26, 2014

Posts by Helper


Total # Posts: 1,700

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

math(algebra 1)
1)3x + y = 0, x - y = 4 Pick and equation, and solve for either x or y x - y = 4 x = 4 + y Substitute, x = 4 + y, for x, in the other equation and solve for y x = 4 + y 3x + y = 0 3(4 + y) + y = 0 12 + 3y + y = 0 12 + 4y = 0 4y = -12 y = -3 substitute y = -3 in either equation...
January 18, 2011

Math
43 heads = 43 animals ( I hope!!) C = number of chickens G = number of goats C + G = 43 2C + 4G = 108 solve simultaneously to find C and G if you are right, C = 32 G = 11
January 18, 2011

algebra
set up ratio 3/2.5 = x/8 2.5x = 24 x = 9.6 $9.60 for 8
January 18, 2011

5th math
4 feet = 4 x 12 in/ft = 48 inches from above, this should say write down the most times a factor was used within one factorization
January 18, 2011

5th math
mean is the average add all the numbers to get the sum divide the sum by the number of numbers you are adding. 33 + 41 + 37 + 27 + 32 = 170 since there are 5 numbers, you divide the sum by 5, to get the mean 170/5 = 34 the mean is 34 LCM 6, 4, 8 LCM is 24 how I was taught ...
January 18, 2011

math
b. 8th:7th = 2:3
January 18, 2011

Math
A = 4pir^2 TA = 4(3.14)(5^2) TA = 4(3.14)(25) TA = ?
January 18, 2011

math
y^2-3y=9 y^2 - 3y = 9 complete the square y^2 - 3y + 9/4 = 9 + 9/4 (y - 3/2)^2 = 45/4 +- (y - 3/2) = 45/4 solve for y y = 3/2 (sqrt5 + 1) y = -3/2 (-1 + sqrt5)
January 18, 2011

algebra 2 and trigonometry
y^2-3y=9 y^2 - 3y = 9 complete the square y^2 - 3y + 9/4 = 9 + 9/4 (y - 3/2)^2 = 45/4 +- (y - 3/2) = 45/4 solve for y y = 3/2 (sqrt5 + 1) y = -3/2 (-1 + sqrt5)
January 18, 2011

math
6th - 125 7th - 150 8th- 100 a) ratio 6th:7th 125:150 = 5:6 b) 8th:7th 100:150 = 4:6 = 2:3 c) 6th: total = 125:375 = 5:15 = 1:3 d) 8th:total = 100:375 = 4:15 check your b. ratio 2:3, not 3:2
January 18, 2011

math
ratio to what? 125 : 150 : 100 5 : 6 : 4
January 18, 2011

Pre-Algebra
vinegar - pH 3 baking soda - pH 9 9 - 3 = 6 units diff. 10 x 6 = 60x as acidic 10^6 = 1 million, so I can't see how that is right 10^1.77815 = 60 or, 6 x 10^1 = 60 is this a pre-algebra question or science?
January 18, 2011

trig
restate your question. I don't understand. is this a right triangle? "i have one degree 25" What does this mean? side b = 2.489 * 10^9 ? or 2,489,000,000? post question exactly as written from your book.
January 18, 2011

Pre-Algebra
:) that's ok. also, you will have better response if posted separate.
January 18, 2011

Pre-Algebra
vinegar - pH 3 baking soda - pH 9 9 - 3 = 6 units diff. 10 x 6 = 60x as acidic 10^6 = 1 million, so I can't see how that is right 10^1.77815 = 60 I am not a tutor, so you might want to repost this as a separate question
January 18, 2011

Pre-Algebra
if this is what you mean 1) a^8/a^8 = 1 2) -x^5/-x^4 = x 3) 15/5 * n^9/n = 3n^8 Also, use separate posts for 2 different questions/subjects
January 18, 2011

math
not enough info to find d and c post the whole problem
January 18, 2011

math 1 digit divisors word problem
you're welcome :)
January 18, 2011

math 1 digit divisors word problem
To have a remainder of 8, the divisor must be greater than 8. The only single digit greater than 8 is 9, so 9 must be the divisor. Since 8 is 1 less than 9, the dividend needs to be one less than a multiple of 9. Candidates are values of 3 digits, as the problem states. The ...
January 18, 2011

Emploument English
true, you are correct
January 18, 2011

Math
7 1/4 = 29/4 = 58/8 3 3/8 = 27/8 58/8 - 27/8 = 31/8 = 3 7/8
January 18, 2011

math
see your 1st post
January 18, 2011

math
7560 = 756. x 10^1 but like Esskay said above, scientific notation would not be used for 7560
January 18, 2011

Sex Ed(English)
A. 12 weeks
January 18, 2011

math
x/y - z = rw solve for x x - yz = yrw x = yrw + yz x = y(rw + z) A
January 18, 2011

algebra
-7 = -1/6x -42 = -x x = 42
January 18, 2011

Sex Ed(English)
thanks Writeacher, I was not clear :)
January 18, 2011

Sex Ed(English)
true
January 18, 2011

math
1/20 of 1.00 = .05 so, 1 nickle or 5 pennies
January 18, 2011

Sex Ed(English)
VERY correct
January 18, 2011

geometry
14q + 8 + 8q - 6 = 90 22q + 2 = 90 22q = 88 q = 4 14q + 8 = 64 8q - 6 = 26 64 + 26 = 90
January 18, 2011

Sex Ed(English)
true
January 18, 2011

math
5 : x = 25 : 30 5/x = 25/30 cross multiply 150 = 25x x = 6
January 18, 2011

math
60 x .80 = 48 spent 60 - 48 = 12 left to invest 12 x .80 = 9.60 $9.60
January 18, 2011

Math
see your 1st post
January 18, 2011

math
6x - 4y - 3x + y 3x - 3y
January 18, 2011

math
600 x .06 x 5 = ?
January 18, 2011

MATHAROOO
think of the midpoint of a line as being the half-point of a line there can only be one point that divides this line into 2 equal parts A--------MP--------B A--------C--------B C is the midpoint of line AB now, you could find the midpoint of segment AC A----MP----C--------B A...
January 18, 2011

Math/Radical Expressions
If this is your equation g/t + g - g/t - g = 0
January 18, 2011

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