477 Answered Questions for the topic Precalculus Homework

Precalculus Homework Math Precalculus Pre Calculus

05/19/16

cos(2?)=1/v2 and 180 degrees<?<270 degrees
Find the value for cos(θ) if the following conditions hold: cos(2θ)=1/√2 and 180o<θ<270o a) -(√1+(√2)) b) -(√2+(√2))/4 c) -(√2(√2))/2 d) -(√2(√2))  
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Precalculus Homework Math Precalculus Pre Calculus

05/19/16

Find 4B (matrix)
Find 4B.  ⌈2  -4⌉ = B ⌊5  -1⌋   ⌈-8  -16⌉=a ⌊-20  -4⌋   ⌈8  -16⌉=b ⌊20  -4⌋   ⌈2   -4⌉=c ⌊20 -4⌋   ⌈8  -16⌉=d ⌊5   -1 ⌋
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Precalculus Homework Math Precalculus Pre Calculus

05/19/16

Write v in the form v = ai + bj
If vector v has an initial point at P1 and a terminal point at P2, write v as multiples of the basis vectors i=〈1, 0〉j=〈0, 1〉 That is, write v in the form v = ai + bj.P1 = (0, −2), P2 = (0, 45) and... more
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Precalculus Homework Math Precalculus Pre Calculus

05/19/16

Determine the angle measure between vectors u and v: u = – 3i + 5j and v = 6i + 2j
Determine the angle measure between vectors u and v: u = – 3i + 5j and v = 6i + 2j .a) 0°, the vectors are parallel.b) 90°, the vectors are perpendicular to each other.c) 97.8°d) 102.5°
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Precalculus Homework Math Precalculus Pre Calculus

05/19/16

(5/3)^6x+2=(9/25)^-x+2
Given the exponential equation:(5/3)6x+2=(9/25)-x+2, find a common base and solve for x.a) -2/3b) -3/2c) 3/2d) 2/3
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Precalculus Homework Math Precalculus Pre Calculus

05/17/16

Pre Calculus
Given the exponential equation:(5/3)6x+2=(9/25)-x+2, find a common base and solve for x.a) -2/3 b) -3/2 c) 3/2 d) 2/3
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Precalculus Homework Math Precalculus Pre Calculus

05/17/16

Pre Calculus
How many winning lottery numbers are possible of a pick 5 where you must match all five numbers from 52 balls? a) 2,598,960b) 6.7 × 1065c) 311,875,200d) 120
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Precalculus Homework Math Precalculus Pre Calculus

05/17/16

Pre Calculus
Solve the equation in the real number system: 9x3+9x2-4x-4=0 a)-3, 0, 3 b)-2/3, 2/3, 1 c)-1, -2/3, 2/3 d)-5, 1, 5  
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Precalculus Homework Math Precalculus Pre Calculus

05/16/16

Pre Calculus
For the rational function f(x)=(x2-1)/(x3+9x2+14x), find the domain. a) (-∞, -7)∪(-7, -2)∪(-2, ∞) b) (-∞, -7)∪(-7, -2)∪(-2, 0)∪(0, ∞) c) (-∞, 0)∪(0, ∞) d) (-∞, 0)∪(0, 2)∪(2, 7)∪(7, ∞)  
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Precalculus Homework Math Precalculus Pre Calculus

05/16/16

Pre Calculus
Given the equation of an ellipse, identify the center point: 4x2 + 40x + 25y2 - 100y + 100 = 0
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Precalculus Homework Math Precalculus Pre Calculus

05/16/16

Pre Calculus
Given the vectors, a = 3i + 4j, b = -2i + 5j, c = 10i -j, find a + (b - c) = ?
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Precalculus Homework

04/27/16

A woman owns 21 pets. Each of her pets is either a bird or a dog. If her pets have a total of 76 legs, how many birds and how many dogs does she have?
This is probably a fairly easy problem. Please help!
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Precalculus Homework

04/24/16

Precalc Homework Question help!
Find all solutions in [0,2pi) :   sin(2t)-sin(t)=0
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Precalculus Homework

04/24/16

Precalc Math HW help please!
Consider the equation cos(3.10t)=.3. Find the smallest positive solutions in radians and round your answer to 4 decimals.
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Precalculus Homework Calculus

04/14/16

How many different sums of money can you make with a penny, a dime, a one-dollar coin, and a two-dollar coin?
I'm having trouble with this question
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Precalculus Homework Precalculus Pre Calculus

04/10/16

how many of these choices is right?
The angle measure,θ, in radians is ...-found by multiplying two rays of length r meters by a distance of s meters.-the openness of two rays, r meters long compared to the circumference in... more
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03/28/16

How can i find b?
A 43 mg of a vaccine is given to a patient to prevent measles. The vaccine leaves the body at a rate of5.2% per hour. b-The number of milligrams of vaccine in the body after h days is how many... more
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Precalculus Homework

03/19/16

Positive/negative angle
Assume the following angle is in standard position. Fnd a positive and negative whose absolute value is less then 360 degrees and is coterminal with the given angle:-485 degrees
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Precalculus Homework

03/08/16

find the time required for an investigation of 1 dollars to grow to 6500 dollars at an interest rate of 7.5 percent per year, compounded quarterly
find the time required for an investigation of 1 dollars to grow to 6500 dollars at an interest rate of 7.5 percent per year, compounded quarterly  
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03/05/16

Quadratic word problem?! PRECALCULUS PLEASE HELP!??
I have tried over and over again and I keep getting the wrong answer!The demand equation for a certain product is given by p=122−0.035x , where p is the unit price (in dollars) of the product and x... more
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03/01/16

Precalc? Determining the area of a rectangle given its perimeter? PLEASE HELP!!?
The length of a rectangular garden is 8 feet longer than its width. If the garden's perimeter is 188 feet, what is the area of the garden in square feet?       I am really stuck on this and I... more
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03/01/16

Precalc question? Determining the dimensions of a rectangle given the area?? PLEASE HELP!!?
I am really stuck on this and I have not used the Pythagorean Theorem in ages. Could you please explain how you solve this as you go? Thank you for the help! I really appreciate it!   The width... more
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Precalculus Homework Precalculus

02/28/16

in details please
John inserts a partially used battery into a portable electric fan. The percent of the battery’s total charge changes at a constant rate of – 2.4 % per minute as the fan is used. When the fan has... more
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02/28/16

Exponential Growth Problem Involving bacteria population??! PLEASE HELP!!! - Precalculus
I am really stuck on this question, particularly questions 3 and 4. Could you please show how you get the answers to those questions and explain? I have been stuck on those for a while and would... more
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02/26/16

The count in a bateria culture was 100 after 15 minutes and 1800 after 30 minutes.? Find the population in 95 minutes? EXPONENTIAL GROWTH PROBLEM!? PLEASE HELP
The count in a bateria culture was 100 after 15 minutes and 1800 after 30 minutes. 1. What was the initial size of the culture? Round your answer to the nearest bacteria. 2. Find the doubling... more
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