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3 years ago

10

PLEASE HELPPPPPPP!!! WILL GIVE BRAINLIEST :)

1 answer:

djverab [1.8K]3 years ago

4 0

Answer:

Give him brainliest

Step-by-step explanation:

You might be interested in

If 1/4 inch on a scale drawing represents 5 miles , what’s does 1 inch represent

Pavlova-9 [17]

20 miles
...................
brainliest pls?

7 0

3 years ago

Read 2 more answers

Solve this please!! I'm really stuck

lora16 [44]

Answer:

-74.

Step-by-step explanation:

First, notice that we can divide it into 2 equations (1 on each side of the equal symbol).

<h3>1st step:</h3>

Replace where's x by -2 in the left equation:

$x+\:-4+\:-2(3x-5)=\square\mathrm{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:replace\:x\:by\:-2}\\-2+\:-4+\:-2((3\cdot-2)-5)=\square\mathrm{\:\:\:\:solve\:the\:multiplication}\\-2-4-2(-6-5)=\square\mathrm{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:remove\:excess\:symbols}\\-2-4-2(-11)=\square\mathrm{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:solve\:multiplication}\\-2-4+22=\square\mathrm{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:solve\:subtraction}\\16=\square$

<h3>2nd step:</h3>

Now, we will replace the squares with 16 in the second equation. Look:

$\square +-4+-2(3\cdot\square\cdot-5)=\triangle\\16 +-4+-2(3\cdot16-5)\\16-4-2(48-5)\\16-4-2(43)\\16-4-86\\=-74$

So, the answer is -74.

<h2>We also can solve it in another way:</h2>

$x-4-2(3x-5)=\\x-4-6x+10\\-5x+6\\\\\mathrm{let's\:replace\:x\:by\:-2:}\\-5\cdot(-2)+6\\10+6\\=16$

Now let's call the gray square as y in the second equation:

$y-4-2(3y-5)\\y-4-6y+10\\-5y+6\\\\\mathrm{let's\:replace\:y\:by\:16:}\\-5\cdot(16)+6\\-80+6\\=-74$

So, your final answer is -74.

Hope it helps! :D

7 0

2 years ago

0.31, 0.35, 0.38, 0.425, 0.8, 32.5 from least to greatest

weeeeeb [17]

Answer:

0.31 0.325 0.35 0.38 0.425 32.5

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

I really need help, I will give brainiest!!

romanna [79]

1. Yes, 25 x 25 = 625.
2. No, as the resulting answer is 6.09 rounded.

6 0

4 years ago

q(t)= Q_0 e^-kt where Q represents the quantity remaining after t years and k is the decay constant 0.00043. How long will it ta

mariarad [96]

It takes 16,064 years for the 500g of radium to decay to 5g.

<h3>How long will it take for 500g of radium to decay to 5g?</h3>

Here we have the decay equation:

$Q(t) = Q_0*e^{-k*t}$

Where Q₀ is the initial amount, and k is the decay constant.

We know that:

Q₀ = 500g

k = 0.00043

And we want to find the value of t such that Q(t) = 5g, so we need to solve:

$5 = 500*e^{-0.00043*t}\\\\5/500 = e^{-0.00043*t}\\\\0.001 = e^{-0.00043*t}$

Now we can apply the natural logarithm in both sides:

$ln(0.001) = ln(e^{-0.00043*t})\\\\ln(0.001) = -0.00043*t\\\\\frac{ln(0.001)}{-0.00043} = t = 16,064.5$

So it takes 16,064 years for the 500g of radium to decay to 5g.

If you want to learn more about decays:

brainly.com/question/7920039

#SPJ1

4 0

2 years ago