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301 Answered Questions for the topic College Math

Solving Systems of Equations with Row Operations

x + 2z = 3 2x + y - 3z = 4 3x - 4y + 5z = -12

Solving Systems of Equations with Row Operations

x + y + z = 3 3x - y - 2z = -4 3x + 4y + 3z = 11

20d

Systems of Equations/Matrices

Solve each of the following systems of equations. If the system has a unique solution (one solution), state this and exhibit the solution. If the system is inconsistent (has no solutions) state... more
College Math Math Statistics

05/30/20

Statistics Question Data from the National Association of Realtors

Data from the National Association of Realtors indicates that the mean price of a home in Denver, Colorado, during April through June of 2012 was 260.7 thousand dollars. A random sample of 50 homes... more
College Math Math Statistics

05/30/20

Statistics question Hypothesis tests for Proportions

A telecommunications company provided its cable TV subscribers with free access to a new sports channel for a period of one month. If then chose a sample of 400 television viewers and asked them... more
College Math

05/20/20

How can I put TOMORROW into numbers?

College Math Math Mathematica

05/17/20

PLEASE HELP ME SOLVE THIS QUESTION

Suppose that f : [0, 3] → R is continuous on [0, 3], differentiable on (0, 3) and f(0) = 0, f(1) = 1, f(3) = 1. Show that there exists c1 ∈ (0, 3) such that f'(c1) = 1. Show that there exists c2 ∈... more
College Math

05/01/20

A chef is going to use a mixture of two brands of Italian dressing.

A chef is going to use a mixture of two brands of Italian dressing. The first brand contains 9% vinegar, and the second brand contains 14% vinegar. The chef wants to make 340 millilitres of a... more
College Math Calculus Math Help

04/23/20

Calculus question

The integral a=-5, b=5, ∫√(25−x^2)dx gives the area of a region R in the xy−plane.a) Identify and sketch the region R.b) Find the area of R using a known geometric formula, not by evaluating... more
College Math Calculus Math Help

04/23/20

Calculus Question help

A particle moves along a line with velocity v(t) = cos(6πt) for 0 ≤ t ≤ 4.a) Find the displacement.b) Find the distance traveled
College Math Math Statistics Question

04/21/20

Two Population Means

At a recent faculty meeting, we were wondering if freshmen have more free time than seniors. We took a sample of 25 freshmen and 23 seniors. Each student was asked to record the amount of free time... more
College Math Math Algebra

04/16/20

Equation of Hyperbola — Help!!

Hi! please help me!Question:A light on a wall produces a shadow in the shape of a hyperbola. If the distance between the two vertices of the hyperbola is 10 inches and the distance between the two... more
College Math Basic Algebra Estimation

02/26/20

Estimate amount of money needed for a 15% tip

Here is the question: Suppose that you want to leave your server a 15% tip on the dinner bill. The total bill amounts to $24.19. Estimate the amount of money that you should leave for a 25% tip.... more

02/26/20

School board 8% salary cut (basic Algebra college math)

Here is the question: A school board announces an across the board salary cut 8%. The superintendent makes $193,780 after the cut has been mad. What was her salary before the 8% cut?
College Math Math Civil Engineering

02/23/20

Supremum and infimum

X1 = { x | x = 0 or x = (1/n) ; n € N(N - set of natural numbers)Find the supremum and infimum(if they exists ) of set X1
College Math Math Statistics

02/21/20

EXPECTED VALUE GAMBLING WHEEL QUESTION

Suppose you bet $1 on red at the roulette wheel. There are 18 red numbers and 20 nonred numbers (including the green 0 and 00). You win $1 if a red number comes up, and you lose $1 if any other... more
College Math Math Calculus

01/28/20

Let f(x) = (e^x - 1)/x. Approximate lim x-->0 f(x)

College Math Precalculus Word Problem

12/09/19

Precalculus word problem

An arch going into an alley is in the shape of a downward opening parabola. The base of the arch is 10 ft. wide, and the arch is 15 ft. high at its center. How wide is the arch 10 ft. up?
College Math Math Taxes

11/03/19

What will Joyce pay at the end of the quarter to her employees?

Joyce Meadows pays her 3 employees $625, $475, and $900 each per week. Calculate what Joyce will pay at the end of the first quarter for (A) state unemployment tax and (B) federal unemployment tax.... more
College Math Math Linear Algebra

11/01/19

Please Help: Linear Algebra Question (linear transformations)

 If T is a linear transformation such thatT([3, 2])=[21, 5, -2] and T([4, -1])=[28, -8, 1]Then the matrix A that induces T is:*I'm confused on how to even approach this problem*Thank you
College Math Math Probability

10/28/19

Help Me Pleaseeeeeee

How many even 4-digit numbers can be formed from the digits 4, 5, 6, 7, and 9 with no repetitions allowed? (Hint: Try filling the units place first.) A red six-sided die and a green six-sided... more
College Math Math Precalculus

10/09/19

Precalculus word problem

A rectangular piece of cardboard measuring 12 inches by 18 inches is to be made into a box w/ an open top by cutting equal-sized squares from each corner and folding up the sides. Let x represent... more
College Math Math Precalculus

10/09/19

Given some zeros of a polynomial function find all zeros of the function

P(x) = 2x^4 - x^3 - 27x^2 + 16x - 80, with zeros: 4, -4
College Math Math Algebra

10/06/19

For all real numbers w and z, such that the product of w and 7 is z, which of the following expressions can represent the sum of w and 7 in terms of z?

For all real numbers  and , such that the product of  and  is , which of the following expressions can represent the sum of  and  in terms of ?
1 3 4 5 6 7 13

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