# Recently Submitted Homework Problems: pre-calculus

109. Is this funtion linear? if so, rewrite in y=b+mx.g(w)= 1-12w/3(Answered)

230. solve the triangle. round angle measures to the nearest minute and side measures to the nearest tenth. a=11.4, b=13.7, c=12.2(Answered)

287. Okay my question has to do with triangle trig, law of cosine and sin, etc. I have to draw a polygon with 6-10 sides, and provide enough info for someone to be required to find 3 or more missing angles and 3 or more missing sides. solve and find the area of the polygon.(Answered)

476. Simplify: 77(sqrt 5x^3)-27(5x^3)(Answered)

548. Find k such that f(x) = x3 - kx2 + kx + 16 has the factor x - 2.(Answered)

1121. Need help simplifying this expression. cos^2(x)(sec^2(x) -1)(Answered)

1180. find all zeros of the polynomial

f(x)=6x^7-x^6-40x^5+2x^4+74x^3+11x^2-40x-12(Answered)

1201. suppose x=-6tan(theta) and the angle theta is in the second quadrant. Write algebraic expressions for sin(theta) and cos(theta) in terms of x(Answered)

1293. sketch the graph of the function y= 3/x to the power 5 identify the horizontal and vertical asymptotes and x, y intercepts(Answered)

1314. Given a sinusoidal function with no vertical shift, an amplitude of 6, and two consecutive zeros at (pi/5 ,0) and (3pi/2 ,0) write an equation to model the function.(Answered)

1344. Write an explanation of how you could use Descartes rule and the Fundamental Theorem to predict the number of complex roots to a polynomial. Please include at least two examples to help clarify your explanation. (Answered)

1387. I need help solving a math problem. its about half-angle identities. it says find the exact value using the half-angle identities. its Cos (pie)/8(Answered)

1435. A pilot of a small private plane can look forward and see the control tower for a small airstrip. Beyond that is a large factory that is 4.8 miles from the airstrip. The angle of depression are 13.1 degrees and 4.1 degrees, respectively. Find the airplanes altitude, to the nearest ten feet.(Answered)

1448. How do you simplify cos^2/1-sin(Answered)

1451. Graphing Rational functions:

Find: X-intercepts, Y-Intercepts, Holes, Vertical and Horizontal Asymptote, Zeroes

1. 3(x-2)(x-5)/(x-2)(x+1)

2. 1/x^2-x-1

3.-3(x^2+2x+1)/4(x^2-1)

4. 5x^2-20/3x^2+12x+12(Answered)

1723. Find constants a and b if f(x)=ax+b/x , if f(1)=1 and f(2)=5.(Answered)

1782. 2/3 of 1/6 of 3/4 of a number is 12(Answered)

1812. rewrite the expression without absolute value symbol: 17-x if x<17 (17-x has absolute value symbol)(Answered)

1967. Help me solve this math problem:

5/x-3 - 2/x^2-9(Answered)

2008. x^2+x-20>0

I need help find solution set for the linear inequalities.(Answered)

2023. 10 workers could do the job in 12 days. If 8 workers work for 5 days and then half of them quit, how long would it take the rest to complete the job?(Answered)

2065. Find all zeros of the polynomial. (Enter your answers as a comma-separated list. If a root has multiplicity greater than one, only enter the root once.)

P(x) = x3 + 9x2 + 26x + 30

(Answered)

2141. A student claims that the line tangent to the graph of f(x)=e^x at x=3 passes through the point (2,0. I need to find the equation of the line tangent to the graph of f at the indicated value of x.(Answered)

2145. Find the root of X^2-19x-42(Answered)

2180. let f(x)=x^2-2x. Evaluate f(-3), f(x+2) and f(x-4)(Answered)

2180. let f(x)=x^2-2x. Evaluate f(-3), f(x+2) and f(x-4)(Answered)

2180. let f(x)=x^2-2x. Evaluate f(-3), f(x+2) and f(x-4)(Answered)

2244. help me solve this problem: 50/1+e^-x=4(Answered)

2302. Find the location (x-values) of the turning points of the function f(x)=-x^3+4x^2+2x-8?(Answered)

2317. find a polynomial of degree n that has the given zeros x=-2,4,7 n=3

(Answered)

2346. Pre cal help question is If one root of f(x)=4x^3-12x^2+11x-3 is x=1, factor f(x). Then sketch the graph of f(x)(Answered)

2593. A fair coin is tossed five times. Find the probability of obtaining one head and three tails.(Answered)

2593. A fair coin is tossed five times. Find the probability of obtaining one head and three tails.(Answered)

2707. The population of Smallvile in the year 1890 was 6250. Assume the population increased at a rate of 2.75% per year. Estimate the population in 1915 and 1940. (Answered)

2765. Please help find sin2x for secx = -5, for pi < x < 3pi/2(Answered)

2811. A rancher has 1000 ft of fencing to enclose 2 adjacent rectangular corrals (they share 1 side).This means there will be 4 sides with length x and 3 sides with length y. (A) State the maximum and minimum lengths for the sides x and y. (B)Find at least 4 workable dimensions that use all 1000 ft of fencing. (C) Find y in terms of x. (D) Find a formula for the combined Area of the 2 corrals. (E) What dimensions yield the maximum area? (Answered)

2921. Two fire towers are 30 km apart, where tower A is due west of tower B. A fire is spotted from the towers, and the bearings from A and B are E 14(degrees) N and W 34 (degrees) N, respectively. Find the distance (d) from the line segment AB.(Answered)

3086. A certain state taxes the first $300,000 in property value at a rate of 1%; all value over $300,000 is taxed at 1.25%. Find a piecewise-defined function T that specifies the total tax on a property valued at x dollars. (Simplify your answer completely.)(Answered)

3086. A certain state taxes the first $300,000 in property value at a rate of 1%; all value over $300,000 is taxed at 1.25%. Find a piecewise-defined function T that specifies the total tax on a property valued at x dollars. (Simplify your answer completely.)(Answered)

3086. A certain state taxes the first $300,000 in property value at a rate of 1%; all value over $300,000 is taxed at 1.25%. Find a piecewise-defined function T that specifies the total tax on a property valued at x dollars. (Simplify your answer completely.)(Answered)

3115. I need help simplifying the expression 1-2cos^2x+cos^4x(Answered)

3132. Help me solve this tan^2x(csc^2x-1)(Answered)

3207. find the exact value: (tan 325 - tan 25)/(1+ tan325tan25)(Answered)

3502. divide f(x) by d(x) in polynomial form and fraction form if f(x)=x2-2x+3; d(x)=x-1(Answered)

3562. find an equation for the hyperbola vertices (3,0),(3,4) asymptotes:y=2/3,y=4-2/3x(Answered)

3627. Help me understand this precalculus problem cos^2A (sec^2A-1)(Answered)

3775. find the exact solutions of the equation: (sin 2x + cos 2x)^2 = 1 in the interval [0,2pi](Answered)

3775. find the exact solutions of the equation: (sin 2x + cos 2x)^2 = 1 in the interval [0,2pi](Answered)

3824. help plz in precal

rewrite the expression in terms of the first power of the cosine. cos^4 x(Answered)

3933. How do I solve this problem ?

A ferryboat carries passengers and cars across a river that runs from north to south.

The river is 0.6 mile wide. The downstream dock is on the east side of the river and

0.15 mile south of the west side's upstream dock. The current in the river runs due

south at 2.5 miles/hour.

a. Find the speed and direction the ferryboat must take to

make the crossing from the upstream dock to the downstream dock in 10 minutes.

b.Find the speed and direction the ferryboat must take to make the crossing

from the downstream dock to the upstream dock in 10 minutes.(Answered)

4079.

complete the identity

(cot x+1)(cot x+1)-csc squared/ cot x

=(Answered)

4112. Find the area of the figure determined by the points: (-3,-1), (-1,3), (7,3), and (5,-1)(Answered)

4116. 15/x-1=24/2x(Answered)

4604. I need help with this problem: Let f(x)=3x-1; show that f^-1 exists(Answered)

5384. How do I verify this equation?

(Answered)

5544. Use the half-angle formula to simplify the expression: sqrt(1+cos 4x/1-cos 4x)(Answered)

5566. Hi, I need some help with this trig. The question is "The area of triangle ABC is 8. If the length of BC is 1/4 the length of AB, then AC equals what?

(Answered)

5583. Limit as x goes to infinity of (1+a/x)^(bx).

(Answered)

5630. I need help with a Math problem.

(Answered)