Mark M.

07/23/19

A solution of 10% sulfuric acid and one of 25% sulfuric acid are to be used to make 500 ml of 20% sulfuric acid. how many ml of each solution needs to be used in the mixture?

A solution of 10% sulfuric acid and one of 25% sulfuric acid are to be used to make 500 ml of 20% sulfuric acid. How many ml of each solution needs to be used in the mixture? (Answer to the nearest... more

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Trigonometry

07/23/19

find the nth roots

Find all complex square roots of −4-4sqrt3 i . In other words, find all complex solutions of x^2=-4-4sqrt3 i

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Algebra 2 Identities Trig Functions

07/23/19

What is tan(x - pi/4)?

If sin x= 7/25, and 0 < x < pi/2, what is tan(x - pi/4)?

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Trigonometry

07/23/19

Complex number in trigonometric form

write the complex number z=2+4i in trigonemetric form. Express the angle θ in radians where 0 is equal to or lesser than θ2pi. z= __(cos__+isin__)please help me fill in the blanks

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Trigonometry

07/23/19

Sum and difference identities

Use the information given below to find tan+αβtan a=5/12, with a in quadrant Icos b=8/17, with b in quadrant IVgive exact answer not a decimal approximation tan(a+b)=Please help and explain

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Algebra 2 Arithmetic Sequence

07/23/19

Find a1 if s20=450 d=5

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Math Algebra 1 Algebra 2

07/23/19

Can someone help me answer this?

√15/x

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Trigonometry

07/23/19

What is 1-tan^2x?

Why can't we say that as 1+sec^2x=tan^2x that 1-tan^2x=-sec^2x?Edit: Here I made a mistakeIt is 1+tan^2x = sec^2x So there isn't a really simple way to get 1-tan^2x.

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Math Algebra 1 Algebra 2

07/23/19

I don’t know the answer, can someone help me out?

3√19/27

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Precalculus

07/22/19

Find f(x) and g(x) so that the function can be described as y = f(g(x)).

This is the function: y= (9/x2) +2

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Algebra 1

07/22/19

Compare and Contrast Domains

Compare and contrast the similarities and differences in the domains of the two following radical functions f(x) and g(x) below:

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Trigonometry

07/22/19

trig finding the exact value

find the exact value of sin(u-v) given that sin u=3/5, and sin v=4/5.find the exact value of cos(u+v) given that sin u=4/5, and sin v=5/13.

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Prealgebra

07/22/19

to figure out how many peanuts are in the bag

jane bought a bag of peanuts.philip took 1/3 of the peanutsjoy took 1/4 of the remaining peanutsbrent took 1/2 of the remaining peanutsThere were 71 peanuts remaining in the bagHow many peanuts... more

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Calculus

07/22/19

Derivatives-Trigonometric: Question is in the description

Find the equation of the tangent line to the curve y = 5 sec ( x ) − 10 cos ( x ) at the point ( π / 3 , 5 ) . Write your answer in the form y = mx + b where m is the slope and b is the y... more

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Sat Math

07/21/19

can someone help me solve this problem

Ahmed needs to produce 5000 milliliters of 50% alcohol solution. At his disposal he has 80% alcohol solution and 40% alcohol solution. How much of each does he need in order to produce his desired... more

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Calculus Exponential Function

07/21/19