hayharbr

If two quantities vary inversely, their product is always the same (constant of variation k). So rb² = k 100 • 4² = k 100 • 16 = 1600 = k so r • 10² = 1600 100r = 1600 r = 1600 ÷ 100 r = 16

in HELP! ALGEBRA 2 PROBLEM? Comment by hayharbr June 2021

x = total stones bought 6 + 6 + 6 + 6 = x 4 • 6 = x

in Math problem? Comment by hayharbr June 2021

if 4 + i√3 over 2 is a root, so is 4 - i√3 over 2 The sum of these is 8/2 = 16/4 the product is 16 - i^2 (3) over 4 = (16 + 3) / 4 = 19/4 so the quadratic giving those roots is (4x² - 16x + 19) [since the sum of the roots of ax^2 + bx + c is -…

in College Algebra problem? Comment by hayharbr June 2021

n = normal walking speed t = time walking with walkway 50 - t = time against 65 = (n + 2.6) • t 65 = (n - 2.6) (50 - t) From the first, 65/(n + 2.6) =t So that makes the second be 65 = (n - 2.6)[50 - 65/(n + 2.6)] FOIL it out 65 = 50n -…

in Algebra Distance Problem Help? Comment by hayharbr June 2021

n = normal walking speed t = time walking with walkway 50 - t = time against 65 = (n + 2.6) • t 65 = (n - 2.6) (50 - t) From the first, 65/(n + 2.6) =t So that makes the second be 65 = (n - 2.6)[50 - 65/(n + 2.6)] FOIL it out 65 = 50n -…

in Algebra Distance Problem Help? Comment by hayharbr June 2021

If y = mx + b, m is slope and b is y intercept. You could write this as y = 1x + 2.

in How do I do this algebra problem? Comment by hayharbr June 2021

A minus outside parentheses changes all the signs inside so do that first 5a - 9 + 8b + 1 + 7a - 4b then combine like terms 12a + 4b - 8

in Algebra 1 Polynomial help? Comment by hayharbr June 2021

Since the numerators are equal, the denominators must be as well. So 1 - cos x = cos x 1 = 2 cos x 1/2 = cos x so x = π/3 or 5π/3.

in (2/(1-cosx)) = (2/cosx)?? Comment by hayharbr June 2021

parallelogram

in a quadrilateral whose opposite sides are parallel is a? Comment by hayharbr June 2021

Since the three extra hours cost an extra $30, you know each extra hours costs $10. So since 9 is 3 more than 6, add another $30 to the $180.

in Algebra II word problem: help? Comment by hayharbr June 2021

Since the three extra hours cost an extra $30, you know each extra hours costs $10. So since 9 is 3 more than 6, add another $30 to the $180.

in Algebra II word problem: help? Comment by hayharbr June 2021

I say true; low levels would not require things like overtime expense for workers, or force the company to buy raw materials at higher prices due to increased demand, or stress the machinery and cause an increase in breakdowns. But I am not an ec…

in TRUE OR FALSE ECONOMICS ? Comment by hayharbr June 2021

I say true; low levels would not require things like overtime expense for workers, or force the company to buy raw materials at higher prices due to increased demand, or stress the machinery and cause an increase in breakdowns. But I am not an ec…

in TRUE OR FALSE ECONOMICS ? Comment by hayharbr June 2021

V = π r² h you'd divide both sides by (π r²) h = V / (π r²)

in Grade 9 math help please!!!!!!!!!!! Algebra? Comment by hayharbr June 2021

V = π r² h you'd divide both sides by (π r²) h = V / (π r²)

in Grade 9 math help please!!!!!!!!!!! Algebra? Comment by hayharbr June 2021

I think you'd have to give the equation in two parts (piecewise): a(n) = 13.5 - 2.5n if n is odd a(n) = 14 - 2.5n if n is even IMO anyway

in arithmetic series??????????????????? Comment by hayharbr June 2021

Divide $6.00 by 60 to get pay per minute = $0.10 or 10 ¢ then since 6 seconds is 1/10 of a minute, find 1/10 of 10 ¢ which is a penny

in Algebra problem, confusing problem? Comment by hayharbr May 2021

You shouldn't fail the course. You'd need to find out what % of your final grade the exam counts for (in our school it was 20%). So if you got say a 50 on the exam, you could still pass (85 • 0.80 + 50 • 0.20 = 78) At least that's how our sch…

in if you fail a regents do you fail the class? Comment by hayharbr May 2021

100% is the total, and 360 °: is the total (in a circle) so make a proportion. Say it's 35% 35/100 = d/360 then cross multiply 100d = 360(35) = 12600 divide by 100 and get d = 126 °

in how do you change a percent into a degree? Comment by hayharbr May 2021