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2 years ago

15

Lodine-131 has a half-life of 8 days. How much of the original 40-gram sample would be left

1 answer:

Brums [2.3K]2 years ago

7 0

Answer:

1.25 grams would be left

Step-by-step explanation:

40/2=20

20/2=10

10/2=5

5/2=2.5

2.5/2=1.25

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Is 3/7 bigger than 1/4

dmitriy555 [2]

Yes! it is bigger than

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2 years ago

Solve for x. x +1/2 = 3/4

Alexeev081 [22]

x + 1/2 = 3/4

set denominators equal:

x + 2/4 = 3/4

-2/4 for both sides:

x = 1/4

there you go! hope this helps!

4 0

2 years ago

Read 2 more answers

20 Points + Brainliest for the answer and Explanation!!!

Vlad1618 [11]

Answer:

$P+Q=5x^2+4$

$Q-P=-x^2-4x+16$

Step-by-step explanation:

We are given

$P=3x^2+2x-6$

$Q=2x^2-2x+10$

Calculation of P+Q:

$P+Q=3x^2+2x-6+2x^2-2x+10$

now, we can combine like terms

$P+Q=3x^2+2x^2+2x-2x+10-6$

$P+Q=5x^2+0+4$

$P+Q=5x^2+4$

Calculation of Q-P:

$Q-P=2x^2-2x+10-(3x^2+2x-6)$

Firstly, we will distribute negative sign

$Q-P=2x^2-2x+10-3x^2-2x+6$

now, we can combine like terms

$Q-P=2x^2-3x^2-2x-2x+6+10$

$Q-P=-x^2-4x+16$

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2 years ago

Explain what makes 3.23 a decimal number.

nignag [31]

Answer:

the point

Step-by-step explanation:

the point makes a decimal a decimal

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3 years ago

Read 2 more answers

Is 3(a+b) = to 3a+3b

Tanzania [10]

Answer:

Yes. Distributive property

Step-by-step explanation:

3(a + b)

Opening bracket

= 3(a) + 3(b)

= 3a + 3b

8 0

3 years ago