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2 years ago

Choose the equation of the horiontal line that passes though the point 2,3

Mathematics

1 answer:

Rzqust [24]2 years ago

7 0

The horizontal line has an equation: y = a, where a is any real number.

We know, the line passes through the point (2, 3) → x = 2, y = 3.

<h3>Answer: y = 3</h3>

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DochEvi [55]

Answer:

Step-by-step explanation:

40/24 = x/15

x = 15•40/24

x = 25

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Natasha2012 [34]

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24 - (-6)

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Work out the question ? <br><br> 4 1/2 - 1 1/3=

vaieri [72.5K]

Answer:

Today: Tuesday, 12th January 2021

16.31 PM

$\tt 4 \frac{1}{2} - 1 \frac{1}{3}$

$= \tt \frac{9}{2} - \frac{4}{3}$

$= \tt \frac{27 - 8}{6}$

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${\orange{\boxed{\red{ \tt = 3 \frac{1}{6} }}}}$

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2 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! I CANNOT RETAKE THIS!!

kipiarov [429]

$T(t) = T_s + (T_0 - T_s)e^{-kt}$

$T(t) - T_s = (T_0 - T_s)e^{-kt}$

$\dfrac{ T(t) - T_s}{T_0 - T_s} = e^{-kt}$

$\ln \dfrac{ T(t) - T_s}{T_0 - T_s} = -kt$

$k = - \dfrac{ \ln \dfrac{ T(t) - T_s}{T_0 - T_s} }{t}$

OK now let's plug in the numbers.

We have t=15 minutes, T_0 = 80 C, Ts = 50, T(15)=60 C,

$k = - \dfrac{ \ln \dfrac{ 60 - 50}{80 - 50} }{15 \textrm{ min}}$

$k = - \frac{1}{15} \ln \frac 1 3$

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$k \approx 0.07324$ per minute

Answer: B

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3 years ago

Whats the answer math will give brainliest

Alex

$ax^2+bx+c=0\\\\\text{From quadratic formula the roots are equal:}\\\\x_1=\dfrac{-b-\sqrt{b^2-4ac}}{2a}\ \text{and}\ x_2=\dfrac{-b+\sqrt{b^2-4ac}}{2a}\\\\\text{We have}\ 2x^2+7x-15=0\\\\a=2,\ b=7,\ c=-15\\\\\text{and}\ r,\ s\ \text{are two solution}\\\\\sqrt{b^2-4ac}=\sqrt{7^2-4(2)(-15)}=\sqrt{49+120}=\sqrt{169}=13\\\\x_1=\dfrac{-7-13}{2(2)}=\dfrac{-20}{4}=-5\\\\x_2=\dfrac{-7+13}{2(2)}=\dfrac{6}{4}=\dfrac{3}{2}\\\\\dfrac{3}{2}>-5\ \text{therefore}\ r=\dfrac{3}{2}\ \text{and}\ s=-5.$

$r-s=\dfrac{3}{2}-(-5)}=\dfrac{3}{2}+5=\dfrac{3}{2}+\dfrac{10}{2}=\dfrac{13}{2}\\\\Answer:\ \boxed{B)\ \dfrac{13}{2}}$

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3 years ago