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2 years ago

giving out 13 points and possibly brainliest for whoever helps solve these 4 questions!!! need asap please

Mathematics

1 answer:

ololo11 [35]2 years ago

4 0

Answer:

it didnt pop up the first time to answer

Step-by-step explanation:

go to de sm os and type in the equation and it will give you everything you need

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Union President Abraham Lincoln set the Union's first naval goal when he declared a blockade of the Southern coasts. His plan wa

Schach [20]

Answer:

OK sounds good

Step-by-step explanation:

6 0

3 years ago

What Is the value of n? -2/3n= 12

Zielflug [23.3K]

The answer is 18 You divide 12 buy -2/3

5 0

3 years ago

Can someone help me privately

SSSSS [86.1K]

Answer:

72 degrees

Step-by-step explanation:

2x+3x=180

5x=180

x=36

36*2=72

3 0

2 years ago

Which rule yields the dilation of the figure QRST centered at the origin?

denis-greek [22]

A) (x, y) → (3x, 3y)

<h2>Explanation:</h2>

When you dilate an object, you enlarge or reduce the size of it. To do this, we need a scale factor which allows us to make the object larger or smaller depending on the value of that factor. Let's call this factor as k, then it is true that:

If k > 1, the object will be larger than the original one.
If k < 1, the object will be smaller than the original one.

If the dilation is performed centered at the origin, then corresponding points of the original and dilated figures will be connected by straight lines, being the center of dilation the point where all the lines meet.

The only option that meets this requirement is:

A) (x, y) → (3x, 3y)

Whose scale factor is k = 3 making the dilated figure larger than the original one.

<h2>Learn more:</h2>

Dilation: brainly.com/question/10946046

#LearnWithBrainly

5 0

2 years ago

You have just isolated a new radioactive element. If you can determine its half-life, you will win the Nobel Prize in physics. Y

Troyanec [42]

Staals half
1 gram left
0.3 grams left
half lives are normally written in years
it goes likt this

$A=P( \frac{1}{2})^ \frac{t}{h}$
A=final amount
P=initila amount
t=time elapsed
h=time half life is (same units as time)

let's use days as the units of time

we are given
initial amount=1gram
final amount=0.3gram
time=4 days

so
$0.3=1( \frac{1}{2})^ \frac{4}{h}$
solve for h
$0.3=( \frac{1}{2})^ \frac{4}{h}$
take the ln of both sides
$ln(0.3)=ln( \frac{1}{2})^ \frac{4}{h}$
$ln(0.3)=\frac{4}{h}ln( \frac{1}{2})$
times both sides by h
$hln(0.3)=4ln( \frac{1}{2})$
divide both sides by ln(0.3)
$h= \frac{4ln( \frac{1}{2}) }{ln(0.3)}$
use calculator
h=2.30287
3 sig figs
h=2.303 days

6 0

3 years ago