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3 years ago

9

Write the point-slope form of the equation of the line through the given point with the given slope.

1 answer:

geniusboy [140]3 years ago

7 0

Answer:

y - 2 = 0(x - 1)

y - 2 = 0

y = 2

Step-by-step explanation:

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At time t = 0 you have 100 grams of radioactive Chromium-48. Ten hours later you have 74 grams left. What is the half life of Ch

Snowcat [4.5K]

To calculate what is asked we use the formula for radioactive decay. It is expressed as follows:

An = Ao (e^(-kt))

We calculate as follows:

An = Ao (e^(-kt))
74 = 100 (e^(-k(10)))
k = 0.0301

1/2 = (e^(-0.0301t))
t = 23 hours

Hope this answers the question.

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3 years ago

What is the slope of the line that passes through (-4, 5) and (2, -3)?

vagabundo [1.1K]

Slope <em>m</em> has a form of,

$m=\dfrac{\Delta{y}}{\Delta{x}}=\dfrac{y_2-y_1}{x_2-x_1}$

We have points <em>A</em> and <em>B</em>,

$A(x_1,y_1),B(x_2,y_2)\longrightarrow A(-4,5),B(2,-3)$

Now insert the values in the slope formula,

$m=\dfrac{-3-5}{2-(-4)}=\dfrac{-8}{6}=\boxed{-\dfrac{4}{3}}$

The answer is A.

Hope this helps.

<u>r3t40</u>

4 0

4 years ago

Someone please help ASAP will give brainliest

Nezavi [6.7K]

Rational:
$\frac{11}{3}$
$6.25$
$0.01045$
Irrational:
$\sqrt{48}$
$\sqrt{ \frac{16}{81} }$
$\sqrt{ \frac{3}{16} }$
$0.42 \: going \: on \: forever$

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3 years ago

Evalute the root in the question below in the screenshot<br> (precalc)

hammer [34]

Answer:

Graph attached

Step-by-step explanation:

jenkins-traub method for the complicate calculation

it has 1 real root: 1.5164

2 complex roots : neglected

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3 years ago

if a supplement of an angle has a measure 78 less than the measure of the angle, what are the measures of the angles?

Citrus2011 [14]

Answer:

x + x -78= 180

2x - 78= 180

2x = 258

x = 129

x-78= 51

7 0

3 years ago