1,954 Answered Questions for the topic linear algebra

Linear Algebra

03/13/23

Equation for Scenario
A local dog walker charges a fee of $15 to pick up, then $4 for each dog that needs to be walked. What equation would represent this scenario?
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Linear Algebra

03/12/23

How many streetlights will the city have at the end of 52 weeks?
A city currently has 170 streetlights. As part of an urban renewal program, the city council has decided to install 3 additional streetlights at the end of each week for the next year.
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Linear Algebra

03/10/23

College Algebra

A text message plan costs $7 per month plus $0.22 per text. Find the monthly cost for x text messages. The monthly cost of x messages is? Dollars. (use integers or decimals for any numbers in the... more
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Linear Algebra Algebra 2

03/10/23

The vertices of a feasible region are (0, 1) (4, 5) and (3, 2). What is the minimum value of the function P = 3x + 2y?
The vertices of a feasible region are (0, 1) (4, 5) and (3, 2). What is the minimum value of the function P = 3x + 2y?
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Linear Algebra

03/09/23

What’s the equation that passes through the points (19,0) and (0,16)
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Linear Algebra

03/06/23

If the singular values of a matrix A∈R3×5 are 6, 4, and 1, find ∥A+∥2 and ∥A+∥F.
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Linear Algebra

03/06/23

Percent for those enrolled in college will equal that for those not enrolled. What will the percent be?
The pattern of higher rates of current alcohol​ use, binge alcohol​ use, and heavy alcohol use among​ full-time college students than among others aged 18 to 22 has remained consistent since 2002.... more
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Linear Algebra

03/05/23

Evaluate the fiction at the indicated values. (if an answer is undefined, enter UNDEFINED)
f(x)=x2 +4x
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Linear Algebra

03/04/23

Alex’s questions
For a given week, Trey's Coffee House has available 1728 ounces of A grade coffee and 1760 ounces of B grade coffee. These are blended into 1-pound packages as follows: an economy blend that... more
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Linear Algebra

03/04/23

The average life expectancy for an elephant is 24 years longer than the life expectancy for a chimpanzee. If the total of these life expectancies is 130 years, find the life expectancy of each.
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Linear Algebra Math Algebra 1 Algebra 2

03/03/23

I REALLY NEED HELP ON THIS ASAP PLEASE!
The equation N(t)= 1200/1 + 199e-0.625t models the number of people in a school who have heard a rumor after t days. a) How many people started the rumor? b) To the nearest tenth, how many days... more
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Linear Algebra Math Algebra 1 Algebra 2

03/03/23

I NEED THIS ASAP PLEASE!
In 1790, Ben Franklin left $4000 with instructions that it go to the city of Philadelphia in 200 years. It was worth about 2 million at that time. Approximate the annual interest rate for the growth.
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Linear Algebra

03/03/23

Matilda's hours of babysitting for a dress
Matilda needs at least $112 to buy a new dress. She has already saved $40. She earns $9 an hour babysitting. Write an inequality that can be used to determine how many hours, x, Matilda will need... more
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Linear Algebra

03/02/23

Costforeachpoundofchocolatechips:$
A store is having a sale on chocolate chips and walnuts. For 8 pounds of chocolate chips and 3 pounds of walnuts, the total cost is $21. For 2 pounds of chocolate chips and 5 pounds of walnuts, the... more
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Linear Algebra

03/01/23

The given equation has a solution r in the interval 3<=r<=-2 Approximate the solution correct to two decimal places.x^(3)+2x^(2)-3x+7=0
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Linear Algebra

03/01/23

Linear equations
A clothing business finds there is a linear relationship between the number of shirts, n ,it can sell and the price, p , it can charge per shirt. In particular, historical data shows... more
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Linear Algebra

02/28/23

how many pints?
The Royal Fruit Company produces two types of fruit drinks. The first type is 60% pure fruit juice, and the second type is 95% pure fruit juice. The company is attempting to produce a fruit drink... more
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Linear Algebra

02/28/23

how much per hour?
Two mechanics worked on a car. The first mechanic worked for 20 hours, and the second mechanic worked for 5 hours. Together they charged a total of $1850. What was the rate charged per hour by each... more
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Linear Algebra

02/28/23

how much for each pound
A store is having a sale on jelly beans and almonds. For 2 pounds of jelly beans and 3 pounds of almonds, the total cost is $9. For 4 pounds of jelly beans and 8 pounds of almonds, the total cost... more
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Linear Algebra

02/27/23

Show that det(A) ≤ a_{11}a_{22}· · ·a_{nn}, where A is positive semidefinite and a_{11}, a_{22}, · · ·, a_{nn} are the diagonal entries.
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Linear Algebra

02/27/23

Show that if AB is invertible, so is B.
Show that if AB is invertible, so is B.
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Linear Algebra

02/27/23

Show that if AB is invertible, so is A. Hint: there is a matrix W such that ABW = I.
Show that if AB is invertible, so is A. Hint: there is a matrix W such that ABW = I.
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Linear Algebra

02/26/23

You want no more than 7 boxes of black pens and no more than 6 boxes of red pens. You want to minimize the cost to your business. What is the objective function for this situation?
You are in charge of buying office supplies for your business. Your workers use red and black pens. Red pens cost $5 per box and black pens cost $3 per box. You need at least 10 boxes of pens. You... more
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Linear Algebra

02/26/23

The profit on a piano is $40 and on an organ it is $30. You want to maximize profit. What is the objective function for this situation?
You own a company that makes organs and pianos. Each week you make at least 6 organs and at least 4 pianos. You company can make at most 16 of the instruments in a week. The profit on a piano is... more
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Linear Algebra Algebra 2

02/26/23

The vertices of a feasible region are (1, 0) (5, 5) and (5, 0). What is the maximum value of the function P = 2x - y?
The vertices of a feasible region are (1, 0) (5, 5) and (5, 0). What is the maximum value of the function P = 2x - y?
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