Y=-2x^2+44x+8 what is the best prediction for the number of cases after 20 years

The number of cases of a new disease may be modeled by the quadratic regression equation y=-2x^2+44x+8 , what is the best prediction for the number of cases after 20 years ( the carrot symbol (^)... more

how can I use this site for free?

I don't want to spend money

06/15/17

find twenty four thousand three hundred twenty one added to itself 25 times

find twenty four thousand three hundred twenty one added to itself 25 times

06/15/17

write as a fraction - a company employs 400 people, and 180 of them are women

Need to find out if this is a ratio or a rate - I am thinking a ratio.  but then I need to write it as a fraction. Is it 180/400  

06/15/17

How much gas to go 800 miles getting 8 miles to a gallon?

a car has 63 gallon tank. Car gets 8 miles per gallon and travels 800 miles. How much gas?

06/15/17

A graph of a line with an infinite slope is horizontal or verticals?

im really just testing this out honestly man. We will see how this goes.

Two numbers have a sum of 24, and 7 times the first number minus the second number is equal to 16. What is the smallest number?

I'm supposed to translate the word problem into a system of equations then solve. Please help!!

06/15/17

if i earn 241 out of 350 points, what is my grade?

This includes my final already.

06/14/17

Exponential Bacteria Problem

One kind of bacterium in a laboratory culture triples in number every 30 minutes. Suppose a culture is started with 30 bacteria cells. After how many minutes will there be more than 20,000 bacteria?

06/14/17

Melissa is taking an entrance exam that is testing only knowledge of chemistry. Which of the following exams is she most likely taking?

SAT-ISAT-IIScholastic Reasoning TestScholarly Aptitude Assessment

06/14/17

If you have a 50 mL graduated cylinder containing 28.5 mL of water, what could you predict the total volume to read if you added a copper block with the density

If you have a 50 mL graduated cylinder containing 28.5 mL of water, what could you predict the total volume to read if you added a copper block with the density of 8.96g/cm^3 into the cylinder

An R-C series circuit has a power factor of 76%. By how many degrees are the voltage and current out of phase with each other?

An R-C series circuit has a power factor of 76%. by how many degrees are the voltage and current out of phase with each other?

06/13/17

What is the equation of the line that is perpendicular to y = (-1/2)x - 3 and goes through point (6,-4)? Write your answer in slope-intercept form.

I need help with my geometry work because some things I'm finding very difficult 

06/09/17

only a variable can be a factor

i need help with my algebra true and false questions.

Magnitudes of x,y,z components

Find the magnitudes of the x, y, and z components of the vector vector A shown in Figure 3-41, given that A = 75 m and θ = 56°.   http://www.webassign.net/walker/03-38alt.gif

06/09/17

true or false

if two consecutive angles of a quadrilateral are right angles, then it must be a rectangle 

06/08/17

Find the cardinal number for the given set

{5,7,9,...,29}

who is correct and why?

Carla and Mandy are solving the inequality below.–4x ≥ 12   Carla says the solution is x ≤ –3, while Mandy says the solution is x ≥ –3. Which student is correct? What mistakewas made by the other... more

06/07/17

What is the greatest multiple of 5 that can be formed using the digits 3, 8, 2 and 5?

Help please. Thank you.

Can I square sqrt 37-11x = 9-x by first squaring the 9 and then the x? Like this (sqrt37-11x)^2=9^2-x^2 which one is correct? And why?

 sqrt37-11x = 9-x Can I square 9 minus x by first squaring the 9 then squaring the x? In other words, would this be correct: (sqrt37-11x)^2 = 9^2-x^2 Why or why not? If it is incorrect, what would... more

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