1,063 Answered Questions for the topic Pre-Calculus

03/22/21

Find the minimum of the objective function, f, subject to the constraints. f=7x+4y, constraints= 5x+y≥60, x+6y≥60, 4x+6y≥204, x≥0, y≥0. thanks!!

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Pre Calculus

03/22/21

what is the answer

For positive acute angles A and B, it is known that cos⁡A=60/61 and tan⁡B=12/35.  Find the value of cos⁡(A−B) in simplest form.
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03/19/21

Find dy/dx for the indicated function y. y=8^x+e^3
Find dy/dx for the indicated function y. y=8^x+e^3dy/dx= ___________ ​(Type an exact​ answer.)
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Pre Calculus Math Algebra 1 Algebra 2

03/17/21

HELP PLEASE, can you show steps to, WILL SEND $$$$$!!!!
A coffee company purchases groups of coffee beans and then divides each group of coffee beans into premium beans, regular beans, and unusable beans. The company needs at least 280 tons of premium... more
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03/17/21

Increasing, Decreasing, and Concavity
The f(x) = x^3 - 6x^2 + 12x + 6 has the following intervals: (-oo,5)U(7,oo)Can someone tell me what interval is this function decreasing, what interval is the concave downward and upward, and what... more
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Pre Calculus Precalculus Pre Calculus

03/17/21

Verify the following identity
1)sin2x+sin4x/cos2x+cos4x=tan3xboth sins are over the cos please show work seeing the problems worked out helps me understand where I went wrong when I first worked it out and I learn better by... more
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Pre Calculus Calculus

03/12/21

Find the first five terms of the recursively defined sequence
 a1 = 5, an = (-1)(n-1)a(n-1) for all n ≥ 2
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Pre Calculus Precalculus Pre Calculus

03/10/21

Solve the equation on the interval 0≤x<2π .
2sin^2x=sinx+3
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Pre Calculus Precalculus Pre Calculus

03/10/21

Solve each equation on the interval 0≤x<2π .
a) tan(x/2)=√3b) sin2x=√3/2
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03/10/21

9.5.89: The total sales of a company​ (in millions of​ dollars) t months from now are given by S(t)=0.04t^3+0.8t^2+8t+7.

The total sales of a company​ (in millions of​ dollars) t months from now are given by S(t)=0.04t^3+0.8t^2+8t+7. ​(A) Find S′(t).​(B) Find ​S(6​) and S′(6) ​(to two decimal​ places).​(C) Interpret... more
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03/10/21

Find the profit function if cost and revenue are given by ​C(x)=128+2.4x and R(x)=8x−0.03x^2
Find the profit function if cost and revenue are given by ​C(x)=128+2.4x and R(x)=8x−0.03x^2The profit function is ​P(x)= ________
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03/10/21

Find the marginal revenue function.
Find the marginal revenue function.​R(x)=x(17−0.05x)R′(x)= _________
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03/10/21

9.7.11 Find the marginal cost function
Find the marginal cost function.​C(x)=210+3.3x−0.07xC′(x) = ____________
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Pre Calculus Calculus

03/07/21

LAW OF SINES AND COSINES
The sailing club leaves the marina on a heading N15oE and sails for 18 miles. They then change course, and after traveling for 12 miles on a heading N35oE, they experience engine trouble and radio... more
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Pre Calculus Math Calculus Precalculus

03/07/21

A Ferris wheel is....
A Ferris wheel is 15 meters in diameter and boarded from a platform that is 5 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel... more
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Pre Calculus

03/06/21

Consider this equation:
Consider the equation, cos(3t) =0.8. Find the smallest positive solution in radians and round your answer to two decimals.
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Pre Calculus Algebra 2

03/04/21

Find a polynomial f(x) of degree 3 with real coefficients and the following zeros: 4 , 2-i
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Pre Calculus Precalculus Pre Calculus

02/24/21

Find the exact values of the other 5 trig functions if cos θ = -1/3, pi/2 < θ < pi
Find the exact values of the other 5 trig functions if cos θ = -1/3, pi/2 < θ < pi
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Pre Calculus Precalculus

02/20/21

MATH HELP PLZ!!!
A​ sparkling-water distributor wants to make up 200 gal of sparkling water to sell for $5.00 per gallon. She wishes to mix three grades of water selling for $8.00, $3.00, and $4.50 per​ gallon,... more
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Pre Calculus Precalculus

02/20/21

MATH HELP PLZ!!!
A rug cleaning company sells three models. EZ model weighs 10​ pounds, packed in a​ 10-cubic-foot box. Mini model weighs 20​ pounds, packed in an​ 8-cubic-foot box. Hefty model weighs 60​ pounds,... more
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Pre Calculus Precalculus

02/19/21

The following augmented matrix is in​ row-echelon form and represents a linear system. Solve the system by using​ back-substitution, if possible.
[1 2| 5][0 1| -1]
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Pre Calculus Pre Calculus

02/11/21

Find f ∘ g and g ∘ f. f(x) = x3, g(x) = x2/3
(a)    f∘ g =(b)    g ∘ f=Find the domain of each function and each composite function. (Enter your answers using interval notation.)domain of f =domain of g =domain of f ∘ g =domain of g ∘ f =
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Pre Calculus Algebra

02/07/21

Find the equation of a tangent line to the given curve at an x-coordinate.
I need to find the slope-intercept form of the tangent line that is formed when the curve of the equation y=x^3-2x-2 intersects with x=1
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Pre Calculus

02/06/21

What is the standard form of the line that is parallel to line 7x-3y=21 and passes through the point (5,2)?

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Pre Calculus

02/06/21

SOLVE TRIANGLE ABC
Solve triangle ABC. (If an answer does not exist, enter DNE. Round your answers to one decimal place. Below, enter your answers so that ∠A1 is smaller than ∠A2.)b = 128,    c = 162,    ∠B = 47°
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