Ask question

Ask question

All categories

3 years ago

14

What is the value of x? 7.5/x= 30/16

2 answers:

hoa [83]3 years ago

7 0

Answer:

4

Step-by-step explanation:

I divided 30/16 and got 1.875, then I knew that 7.5 would have to have the same answer. I did a process of elimination by dividing 7.5 by numbers at random and finally divided by 4 and got the answer. Another way to get the answer would be to cross multiply the equation.

Yakvenalex [24]3 years ago

6 0

X=4

7.5/4=30/16
120=30x
4=x

You might be interested in

The radioactive element americium-241 has a half-life of 432 years. How many years will it take a 10 gram mass of americium-241

geniusboy [140]

<h2>Answer: 816 years</h2>

This problem can be solved using the <u>Radioactive Half Life Formula: </u>

<u />

$A=A_{o}.2^{\frac{-t}{h}}$ (1)

Where:

$A=2.7g$ is the final amount of the material

$A_{o}=10g$ is the initial amount of the material

$t$ is the time elapsed (the quantity we are asked to find)

$h=432y$ is the half life of americium-241

Knowing this, let's find $t$ from (1):

$2.7g=(10g).2^{\frac{-t}{432y}}$

$\frac{2.7g}{10g}=2^{\frac{-t}{432y}}$

$0.27g=2^{\frac{-t}{432y}}$

Applying natural logarithm in both sides:

$ln(0.27g)=ln(2^{\frac{-t}{432y}})$

$-1.309=-\frac{t}{432y}ln(2)$

$-t=\frac{(-1.309)(432y)}{0.693}$

<u></u>

<u>Finally:</u>

$t=816y$

3 0

3 years ago

The scissor-tailed flycatcher is Oklahoma's state bird. If the combined weight of

Sergeu [11.5K]

Answer:

i dont know sorry

Step-by-step explanation:

8 0

3 years ago

Stuck on this one please help

Mashutka [201]

Answer:

3

Step-by-step explanation:

3^10= 3^7(x^3)

59049= 2187(x^3)

59049/2187= x^3

27=x^3

Do the square root of 3 to both sides and you end up with x=3.

Hope this helped :)

7 0

4 years ago

Wo similar triangles are shown on the coordinate grid:

anygoal [31]

Answer:

The correct answer is option D. Dilation by a scale factor of 2 followed by reflection about the x-axis

8 0

3 years ago

Read 2 more answers

Divide 9.48 ÷ 0.24 = ______.

Ray Of Light [21]

Answer:

39.5

Step-by-step explanation:

In the attached file

6 0

3 years ago