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2 years ago

If the zeros of a quadratic function, F, are -2 and 4, what is the equation of the axis of symmetry of F

Mathematics

1 answer:

vagabundo [1.1K]2 years ago

3 0

Answer:

x=1

Step-by-step explanation:

if the zeroes are (-2,0) and (4,0), then the axis of symetry is going to be right in the middle of those two, with the graph reflected equally on either side.

so you get:

(4-2)÷2=1

therefore the equation of the axis of symetry is x=1

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In 1980,in Great Falls, Montana, temperature rose from -32 Fahrenheit to 15 Fahrenheit in seven minutes.How much did the tempera

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The temperature rose by 47 degrees Fahrenheit, because it first went from -32 to 0, and then from 0 to 15.

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3 years ago

Need help with this question

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3 years ago

Read 2 more answers

A thermometer is taken from an inside room to the outside, where the air temperature is 20° f. after 1 minute the thermometer re

fomenos

The change in the temperature is proportional to the difference in temperatures. Let's call the initial temperature of the room and the thermometer $E_0$ and the current temperature $E(t)$ where $t$ is the elapsed time in minutes. The outside temperature is 20 F.

Newton's Law of Cooling:

$E(t) - 20 = (E_0 - 20) e^{- k t}$

We're given $E(1)=70 \textrm{ and } E(5)=45$

$70-20 = (E_0 - 20) e^{-k}$

$45-20 =(E_0 - 20) e^{-5k}$

Dividing,

$\dfrac{50}{25}=e^{4k}$

$k = \dfrac 1 4 \ln 2$

Now,

$E(t) - 20 = (E_0 - 20) e^{- k t}$

$E_0 = 20 + (E(t) - 20)e^{k t}$

$E_0 = 20 + (E(1) - 20)e^{k}$

$E_0 = 20 + (70 - 20)e^{\ln 2/4}$

$E_0 = 20 + 50 \cdot 2^{1/4} \approx 79.46 \textrm{ degrees F}$

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4 years ago

The base of a triangle is 1/3 of a foot long and the triangle is 12 feet tall what is the area of the triangle

jok3333 [9.3K]

Answer:

Step-by-step explanation:

Base, b = 1/3

Height, h = 12feet = (12x 0.305)metres = 3.66m

Area of triangle= 1/2 bxh

A = 1/2 x 1/3 x 3.66

A = 0.61m^2

Or in feet's

Area of triangle = 1/2 bxh

A = 1/2 x 1/3 x 12 =2 feet^2

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3 years ago

Which is an integer which is not -19/12 6 -25/5 -9.16 -88

White raven [17]

6, 88, and -25/5 are integers - the rest aren’t

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3 years ago