239 Answered Questions for the topic Quadratic Formula

12/09/16

#### Julie wants to build a sidewalk of uniform width around her garden.

Julie wants to build a sidewalk of uniform width around her garden. Her garden is rectangular, and its dimensions are 20 feet by 30 feet. She has enough pavers to cover 900 square feet and wants to...
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12/07/16

#### quadratic formula

i bought a truckload of wreaths for 750$ and priced them so I would make a 2$ profit on each one sold. When i sell all but 100 wreaths, i break even. how many wreaths were in the truckload?

12/05/16

#### How long does he have until the ball reaches the ground?

Draco steals and throws Neville's red ball straight up at 78 feet per second from about 10 feet above the ground. The ball's height in feet above the ground after t seconds is given by...
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11/29/16

#### What are the lengths of the sides of the mirror and the painting?

A square mirror has sides measuring 2 feet less than the sides of a square painting. If the difference between their areas is 32 square feet, find the lengths of the sides of the mirror and painting.
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11/28/16

#### What are its dimensions?

Someone installs 96 feet of electric fencing around a rectangular headquarters. If the headquarters covers 540 square feet, what are its dimensions?

11/20/16

#### Quadratic Word problem

A toy rocket is launched form a 3m platform, at 8.2m/s. The height of the rocket is modelled by the equation h=-4.0t^2+8.1t+3 where h is the height, in metres, above the ground and t is the time,...
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11/16/16

#### What is this formula for in the mathematic point of view?

I have derived a formula and I wonder what formula is similar to this one in a mathematical point of view?
F = (X2 - Y2)/ (X - Y )2
Is there any formula that looks like this one and is used...
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11/07/16

#### When will the object hit the ground after it is launched? Explain how you found your answer

An object is launched from the ground. The object’s height, in feet, can be described by the quadratic function h(t) = 80t – 16t2, where t is the time, in seconds, since the object was launched.

11/04/16

#### Solve the equation x = 2 × 1 x + 1

Find a number that is exactly 1 more than 2 times its reciprocal. That is, solve the equation x = 2 × 1 x + 1.

10/17/16

#### solving by the quadratic formula

In Algebra 1 I am given the following problem:
Solve by the quadratic formula: 5x - 1 = 2x2
Please help me.

10/16/16

#### Newspaper profit

A newspaper's profit is $20 per year for each of its 2,500 subscribers. Management estimates that the profit per subscriber will increase by 1¢ for each additional subscriber over the current...
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10/12/16

#### quadratic function (word problem)

A ball is thrown up in the air from the ground and follow the function h(t) = 50t - 4.90t2 where t is time in seconds. what is the total time the ball stays in the air.
I need help in answering...
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10/08/16

#### I need help solving equation by use of quadratic formula 5a^2+4a=8

The answer I got from trying this was x=0.926649916142
I just wanted to double check this problem I really appreciate the help.

09/21/16

#### Problem Solving-Quadratic Formula. Don't quite understand how to solve

In a shot put even, Jenna tosses her last shot from a position of about 6 feet above the ground with an initial vertical and horizontal velocity of 20 ft./s the height of the shot is modeled by the...
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07/28/16

#### Really need help for this question! (URGENT)

The height, y metres, of an object projected directlyupwards from the grouncl can be modelled byy = 17t-5t^2, where t is the time in seconds after itleaves the ground.
(iii) 1. 5 seconds after the...
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07/27/16

#### Dimensions of a Box

A rectangular shipping crate is in the form of a cube. The width is decreased by 2 m while thelength is increased by 2m and the height is increased by 3 m. The new crate has a volume of168 m^3....
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06/20/16

#### A boy rides a bike 8 miles. The trip would have taken 20 minutes less if he had ridden 2 miles per hour faster. Find his actual speed.

Algebraic question, possibly including the discriminant and/or quadratic formula, because this question was under the quadratic formula category.

06/05/16

#### when do you know you cannot factor a quadratic relation, and know when exactly to use quadratic formula??

I know how to factor and how to use the quadratic formula... but however I can't seem to grasp, when to use quadratic formula. I mean when a relation cannot be factored, but how do you determine it...
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05/19/16

#### Quadratic Formula 2 Part Question

The percent of U.S. households with high-speed internet h can be estimated by: h = -0.2n2 + 7.2n + 1.5 Where n is the number of years since 1990. A. Use the Quadratic Formula to determine when 20%...
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05/10/16

#### A rectangle's length is 6 units greater than its width. Write an equation expressing the rectangle's area, A, as a function of w.

I dont understand this question :/

05/05/16

#### The length of a rectangle is 3” more than twice the width. The area of the rectangle is 150 in^2. Find the dimensions of the rectangle.

The length of a rectangle is 3” more than twice the width. The area of the rectangle is 150 in^2. Find the dimensions of the rectangle.

05/05/16

#### A triangular reflecting pool has a base of 6 feet and an altitude of 4 feet (continued)

It is decided to increase the size of the pool by extending the base and altitude each by x feet. Find x so that the new area of the pool is 24 square feet.
I am at a loss to start this...
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05/03/16

#### Use the quadratic formula to solve : 0.7x^2-4.2x-0.7=0

Use the quadratic formula to solve : 0.7x2-4.2x-0.7=0
The solution set is {_}

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