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978

quadratic functions

researchers found that the relationship between the yield of crop and the amount of watering could be modeled by y = -1478 + 3345x - 446x^2, where y is the yield, in kilograms per hectare (kg/ha), and x is the annual amount of water, in hectare-metres (ha-m). read more ..

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Guest Apr 28, 2019

858

+257

logs..

2. If 3^x=5 what is the value of 3^2x3+3?

3. If b=log3x what is the real value of x which satisfies logb(log3x^2)=2?
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SydSu22 Apr 28, 2019

1852

Doing quadratic functions... help is appreciated! Thanks!

Doing quadratic functions... help is appreciated!
A football is punted into the air. Its height h, in metres, after t seconds is given by h(t) = 1+24.5t - 4.9t^2.
A) Find the maximum height of the ball by completing the square. Round your answer to read more ..

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Guest Apr 28, 2019

667

How do I find the domain and range of d?

So I'm doing this question and my answer is d(x)= 5 (x−3/10)^2 + 11/20. Now it's asking me to find the domain and range and also to graph the function of d.

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Guest Apr 28, 2019

464

standard deviation

A particular fruit's weights are normally distributed, with a mean of 786 grams and a standard deviation of 15 grams.
If you pick 10 fruits at random, then 20% of the time, their mean weight will be greater than how many grams?
Give your answer to read more ..

Guest Apr 28, 2019

830

+166

help

Among the following functions, let a be the number of functions that are even, let b be the number of functions that are odd, and let c be the number of functions that are neither even nor odd. Enter your answer in the form "a,b,c ".
read more ..

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grif389 Apr 28, 2019

848

+166

help Please

please refer to image(2 part question)
read more ..

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grif389 Apr 28, 2019

Apr 27, 2019

482

Is there a way to solve this without doing each inequality manually?

Is there a way to solve this without doing each inequality manually? I don't need the answers, I just need to know if there's an easier way.

read more ..

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Guest Apr 27, 2019

468

HELP ASAP

Find the smallest positive N such that

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Guest Apr 27, 2019

795

HELP

How many positive integers N from 1 to 5000 satisfy the congruence

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Guest Apr 27, 2019

1477

+394

What is the least positive integer n such that 1560 divides n! ?

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hellospeedmind Apr 27, 2019

903

Let be real numbers such that Let and be the smallest and largest possible values of respectively. Find

Let be real numbers such that
Let and be the smallest and largest possible values of respectively. Find

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Guest Apr 27, 2019

608

study this graph and interpret it.

http://prntscr.com/nhppcg <--- graph

http://prntscr.com/nhpq1f

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Guest Apr 27, 2019

619

I don't know what I am doing wrong please help

I'm not sure if it was me reading the question wrong or something but my answer is wrong.

A standard deck of cards has 52 cards divided into 4 suits, each of which has 13 cards. Two of the suits (and, called 'hearts' read more ..

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Guest Apr 27, 2019

836

I forgot my username... but I remember my password... (That's strange)

Hi,
I have an account on this website but not using it for a couple months made me forgot my username... I only remember my password!

Is this anyway I can find out read more ..

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Guest Apr 27, 2019

647

Derivatives

For the equation f(x,y) = arctan (x/y)
how do you calculate it’s first and second order partial derivative?

i know the way to find it but for this question I keep getting it wrong, so i wish someone can help me with it. read more ..

Rom ●●

Guest Apr 27, 2019

407

Calculus problem

I need help with this question please. Thank you.

Guest Apr 27, 2019

446

Help please!

I need help with this one, thanks.

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Guest Apr 27, 2019

647

Help. Urgent PLZ

Let
Then this equation can be expressed in the form for some constants a, b, and c and Enter your answer in the form "a,b,c ".

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Guest Apr 27, 2019

1034

+47

help asap pls (1 question only)

1.) The function $\lfloor x\rfloor$ is defined as the largest integer less than or equal to $x$. For example, $\lfloor 5.67\rfloor = 5$, $\lfloor -\tfrac 14\rfloor = -1$, and $\lfloor 8\rfloor = 8$.What is the range of the function $$f(x) = \lfloor x\rfloor read more ..

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lolzforlife Apr 27, 2019

541

Need Help!

The height of a ball when it is thrown off a cliff can be represented by the equation $h=45-7t-6t^2$, where $t$ is time in seconds. In how many seconds will the ball reach a height of 25 feet?

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Guest Apr 27, 2019

795

Help!!!

Suppose $$a(2+i)^4 + b(2+i)^3 + c(2+i)^2 + b(2+i) + a = 0,$$
where $a$,$b$,$c$ are integers whose greatest common divisor is $1$.
Determine |c|.

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Guest Apr 27, 2019

907

+217

Help

How many numbers among 1, 2, 3, ..., 1000 are not divisible by 9?

How many distinct arrangements can be made from the letters in the word "REARRANGE''?
read more ..

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Rudram592 Apr 27, 2019

All Questions ⁺⁰237691 Questions

quadratic functions

logs..

Doing quadratic functions... help is appreciated! Thanks!

How do I find the domain and range of d?

standard deviation

help

help Please

Is there a way to solve this without doing each inequality manually?

HELP ASAP

HELP

What is the least positive integer n such that 1560 divides n! ?

Let be real numbers such that Let and be the smallest and largest possible values of respectively. Find

study this graph and interpret it.

I don't know what I am doing wrong please help

I forgot my username... but I remember my password... (That's strange)

Derivatives

Calculus problem

Help please!

Help. Urgent PLZ

help asap pls (1 question only)

Need Help!

Help!!!

Help

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