# Posts by helper

Total # Posts: 1,873

**MATH_ALGEBRA**

you're welcome :)

**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...

**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

**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

**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

**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

**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

**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

**math**

from above .03 = value of mixture this should be x + 100 = mixture total number of oz

**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

**Intermediate Algebra**

V = 2(pi * L^2) or V = 2pi * 2L^2

**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 = ...

**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

**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

**Algebra**

x = each base vertex angle = 1/2x + 10 solve x + x + 1/2x + 10 = 180

**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

**algebra**

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

**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

**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

**calculus**

A = Lw 25 = Lw w = 25/L P = 2w + 2L P = 2(25/L) + 2L P = 50/L + 2L

**Algebra 1**

5x + y = 5x + (3x âˆ’ 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

**Algebra 1**

no way to solve this

**math**

cannot solve either as separate equations

**math**

see your other post

**ALGEBRA**

4 + x(10 - 8) 4 + 10x - 8x 4 + 2x 2x = -4 x = -2

**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

**algebra**

don't understand what you need done repost

**MATH**

881/5 = 176 1/5

**Algebra 1**

5y + 4x = -41 what are you solving for?

**Algebra 1**

incomplete problem try again :)

**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

**math(algebra 1)**

2) you are correct x - y = 4 add + y to both sides x - y + y = 4 + y x = 4 + y

**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...

**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

**algebra**

set up ratio 3/2.5 = x/8 2.5x = 24 x = 9.6 $9.60 for 8

**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

**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 ...

**math**

b. 8th:7th = 2:3

**Math**

A = 4pir^2 TA = 4(3.14)(5^2) TA = 4(3.14)(25) TA = ?

**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)

**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)

**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

**math**

ratio to what? 125 : 150 : 100 5 : 6 : 4

**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?

**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.

**Pre-Algebra**

:) that's ok. also, you will have better response if posted separate.

**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

**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

**math**

not enough info to find d and c post the whole problem

**math 1 digit divisors word problem**

you're welcome :)

**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 ...

**Emploument English**

true, you are correct

**Math**

7 1/4 = 29/4 = 58/8 3 3/8 = 27/8 58/8 - 27/8 = 31/8 = 3 7/8

**math**

see your 1st post

**math**

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

**Sex Ed(English)**

A. 12 weeks

**math**

x/y - z = rw solve for x x - yz = yrw x = yrw + yz x = y(rw + z) A

**algebra**

-7 = -1/6x -42 = -x x = 42

**Sex Ed(English)**

thanks Writeacher, I was not clear :)

**Sex Ed(English)**

true

**math**

1/20 of 1.00 = .05 so, 1 nickle or 5 pennies

**Sex Ed(English)**

VERY correct

**geometry**

14q + 8 + 8q - 6 = 90 22q + 2 = 90 22q = 88 q = 4 14q + 8 = 64 8q - 6 = 26 64 + 26 = 90

**Sex Ed(English)**

true

**math**

5 : x = 25 : 30 5/x = 25/30 cross multiply 150 = 25x x = 6

**math**

60 x .80 = 48 spent 60 - 48 = 12 left to invest 12 x .80 = 9.60 $9.60

**Math**

see your 1st post

**math**

6x - 4y - 3x + y 3x - 3y

**math**

600 x .06 x 5 = ?

**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...

**Math/Radical Expressions**

If this is your equation g/t + g - g/t - g = 0

**MATH**

6/330 =0.018182

**Math**

5x = 4y - 30 2x + 3y +-12 (1) 5x - 4y = -30 (2) 2x + 3y = 12 multiply (1) by 3(5x - 4y = -30) (1) 15x + 12y = -90 multiply (2) by 4(2x + 3y = 12) (2) 8x + 12y = 48 ADD two new equations (1) 15x + 12y = -90 (2) 8x + 12y = 48 23x + 0 = -42 23x = -42 x = -42/23 substitute x = -42...

**math**

correction-this should be net salary * 12 mo. = annual net salary

**math**

you have a typo in $2,3500.00 Monthly wage - 468 = net salary net salary * 52 weeks = annual net salary

**math**

1 1/12 = 13/12 2 = 24/12 24/12 - 13/12 = 11/12 left

**math**

165/3 = ?

**algebra**

3x - 5y = 61 3x - y = 17 multiply 1st by -1(3x - 5y = 61) -3x + 5y = -61 3x - y = 17 ADD two equations 0 + 4y = - 44 4y = -44 y = -11 substitute y = -11 in 3x - y = 17 to find x 3x - y = 17 3x + 11 = 17 3x = 6 x = 2 check x = 2, y = -11 in one of the equations I'll leave ...

**Math**

r = 5, h = 10 SA = 2 pi r^2 + 2 pi r h SA = 2(pi)(5^2) + 2(pi)(5)(10) SA = 2(pi)(25) + 2(pi)(5)(10) SA = 50pi + 100pi SA = 150 pi m^2 do you have the formula for a right circular cylinder? I've checked my math and I get 150pi m^2 if you can post the formula from your book ...

**Math**

r = 5, h = 10 SA = 2 pi r^2 + 2 pi r h SA = 2(3.14)(5^2) + 2(3.14)(5)(10) SA = 2(3.14)(25) + 2(3.14)(5)(10) SA = 50(3.14) + 100(3.14) SA = 157 + 314 = 471 m^2

**algreba**

n = number of trees 84n <= 2400 n <= 28.57

**math**

this is an easy one to graph. just pick some values for x or y and solve for the other value what are you having trouble doing? we can't graph it for you. for y = x + 1 x = 0, y = 1 (0,1) x = 1, y = 2 (1,2) x = 2, y = 3 (2,3) x = 3, y = 4 (3.4) x = 4, y = 5 (4,5) for y = ...

**Calculus**

forgot to add, there are other forms for this answer post your answer if you are not sure if equil. to above posted answers

**Calculus**

Answer 1/3 (sqrt(x^2 + 100))^3 - 100(sqrt(x^2+100)) + C this can be transformed into 1/3 (x^2 - 200)(sqrt(x^2 + 100) + C my book had 1st answer (not transformed) let me know if you need more help with this

**math**

A = Lw A = 9 * 3 A = 27 sq ft/units 27 * 12 = ?

**math**

I used an online calculator for this Mean = 59.64 Median = 58 Sample standard deviation = 10.19

**math**

this is a permutations 3 cds / 3 cases = 3! = 3 x 2 x 1 = 6 6 different ways

**algebra**

900/3 = 300/yr 300/7500 = .04 Or PRT = I R = I/PT R = 900/(7500 * 3) R = .04 = 4%

**math/algebra**

y = 1/2 x - 4 what do you need to do ?

**Math**

SA = 2 pi r^2 + 2 pi r h r = 5, h = 10 SA = 2(3.14)(5^2) + 2(3.14)(5)(10) I'll leave the math to you. express answer in sq m

**Geometry**

right triangle

**Geometry**

L = 11 w = 13'10" = 13.83' A = Lw A = 11 * 13.83 A = ? sq ft

**Geometry**

1) L = 120 - 20 = 100 w = 80 - 20 = 60 A = Lw A = 100 * 60 A = 6000 sq ft 2) 12,500/50 = 250 sq ft/dog 6000/250 = 24 dogs

**Geometry**

12 x 6 = 72 req, space needed x = total space .15x = 72 x = 480

**Geometry**

x = 1st angle x + 20 = 2nd angle x + x + 20 = 90 2x = 70 x = 35 35, 55

**Geometry**

using ratios 4'" = 4.75' 4.75 : 6 = x : 19 4.75/6 = x/19 cross multiply 90.25 = 6x x = 15.04167 x = 15 check my math, it's late for me

**Algebra 2**

L = length w = L - 3 A = Lw 28 = L * (L - 3) 28 = L^2 - 3L L^2 - 3L - 28 = 0 solve by completing the square if you are right L = -4, L = 7 since length can't be neg., throw out -4, so L = 7 and width = 4

**Math**

C = pi* d or C = 2* pi r C = pi * 10 C = 10pi

**Math (Algebra 2)**

answer is 5x^3 - 14x^2/3 - 40x/9 + 256/27 + (230/27)/(3x + 1) this is really something you need to do yourself because I can't show you how, I can only give you the answer

**Algebra 2**

x = heather now 5x = george now 5x + 4 = 3(x + 4) 5x + 4 = 3x + 12 2x = 8 x = 4 heather - 4 george - 20