2 years ago

PLEASE HELP IT’S DUE TMR!!

Mathematics

1 answer:

iragen [17]2 years ago

3 0

4856

1.07

12.9

7.00

0.00199 (199)

0.000660 (660)

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statistical models predict that price p( in dollars) of a new smartphone will change according to the function p=900-4t^2. where

miskamm [114]

You are given the function $p=900-4t^2.$

Express t:

$4t^2=900-p,\\\\t^2=\dfrac{900-p}{4},\\\\t=\sqrt{\dfrac{900-p}{4}}.$

This expression gives the month t in terms of the price p.

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3 years ago

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What is the average acceleration of a southbound train that slows down from 15 m/s to 8.6 m/s in 1.2 s?

horrorfan [7]

Answer:

The average acceleration of train is $5.34\ m/s^2$

Step-by-step explanation:

We have,

A train that slows down from 15 m/s to 8.6 m/s in 1.2 s. It means that 15 m/s is its initial velocity and 8.6 m/s is its final velocity.

It is required to find the average acceleration of the train.

$a=\dfrac{v-u}{t}\\\\a=\dfrac{(8.6-15)\ m/s}{1.2\ s}\\\\a=-5.34\ m/s^2$

The average acceleration of train is $5.34\ m/s^2$ . Negative signs shows that the train is decelerating.

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3 years ago

Find the square: (5x - 4y)2 <br><br> (and please put the process of solving the equation)

satela [25.4K]

$(5x-4y)^2$
$(5x-4y)(5x-4y)$

Multiply each term in one bracket in turn by the terms in the other bracket

$(5x)(5x) = 25x^2$
$(5x)(-4y)=-20xy$
$(-4y)(5x)=-20xy$
$(-4y)(-4y)=16y^2$

Put them together we have
$25x^2-20xy-20xy-16y^2$
$25x^2-40xy-16y^2$

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AysviL [449]

Answer:

when 0 on the bottom is zero

Step-by-step explanation:

that mean there would be no whole nor a proper quotient

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Reduce 6/33 to lowest terms