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4 years ago

8

What is the rule for the function whose graph is shown ?

1 answer:

AysviL [449]4 years ago

6 0

Hopefully this will help you.

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What is 1/2x+13=20? What is x??

guapka [62]

X = 14
1/2 of 14 = 7
7 + 13 = 20

7 0

3 years ago

The Indian Tea Company makes a tea blend of cinnamon tea worth $2.50 per kilogram and black tea

MakcuM [25]

Answer:

<em>Good Luck!</em>

Step-by-step explanation:

3 0

3 years ago

Element X decays radioactively with a half life of 12 minutes. If there are 160

Salsk061 [2.6K]

Answer:

It would take 75.8 minutes for the element to decay to 2 grams.

Step-by-step explanation:

The number of grams of element x, after t minutes, is given by the following equation:

$X(t) = X(0)(1-r)^{t}$

In which X(0) is the initial amount and r is the decay rate.

There are 160 grams of Element X

This means that X(0) = 160.

So

$X(t) = X(0)(1-r)^{t}$

$X(t) = 160(1-r)^{t}$

Half life of 12 minutes.

This means that X(12) = 0.5*X(0) = 0.5*160 = 80. So

$X(t) = 160(1-r)^{t}$

$80 = 160(1-r)^{12}$

$(1 - r)^{12} = 0.5$

$\sqrt[12]{(1 - r)^{12}} = \sqrt[12]{0.5}$

$1 - r = 0.9438$

So

$X(t) = 160(1-r)^{t}$

$X(t) = 160(0.9438)^{t}$

How long would it take for the element to decay to 2 grams?

This is t for which X(t) = 2. So

$X(t) = 160(0.9438)^{t}$

$2 = 160(0.9438)^{t}$

$(0.9438)^{t} = \frac{2}{160}$

$\log{(0.9438)^{t}} = \log{\frac{2}{160}}$

$t\log{0.9438} = \log{\frac{2}{160}}$

$t = \frac{\log{\frac{2}{160}}}{\log{0.9438}}$

$t = 75.8$

It would take 75.8 minutes for the element to decay to 2 grams.

6 0

3 years ago

I need help ahhh <br><br><br> Graph y= -1/3x + 5

Montano1993 [528]

Start with putting the dot on the right to positive 5 on the y-axis (the vertical line) then from there use rise over run method. since it is negative you will move the dot on the left down instead. you will go DOWN 1 and to the LEFT 3. i’m sorry if i’m wrong:(((

8 0

3 years ago

Help plz will give brainlist if yor right

sweet-ann [11.9K]

Answer:

$x + 7 = 18$

Step-by-step explanation:

$2(x + 7) = 36$

<h3> $\frac{2(x + 7)}{2} = \frac{36}{2}$ </h3><h3> $x + 7 = \frac{36}{2}$ </h3>

$x + 7 = 18$

<h3>Hope it is helpful....</h3>

7 0

3 years ago