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natta225 [31]
3 years ago
8

by 14 1 4 each week for a number of weeks, w . He writes the expression 20(14) 20 ( 1 4 ) w to find the amount of radioactive su

bstance remaining after w weeks. Autumn starts with 5 5 milligrams of a radioactive substance. The amount of the substance decreases by 50% 50 % each week for a number of weeks, w . She writes the expression (1−0.5) ( 1 - 0 . 5 ) w to find the amount of radioactive substance remaining after w weeks. Use the drop-down menus to explain what each part of Nick's and Autumn's expressions mean.
Mathematics
1 answer:
erastovalidia [21]3 years ago
8 0

Answer:

1/2 ^w : decay factor after w weeks

hope this helps

Step-by-step explanation:


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Which fraction is equivalent to the fraction shown by this model. 12/9​
svp [43]

Answer:

4/3

Step-by-step explanation:

12/9 is equivalent to 4/3, because you can divide both the numerator and denominator by the common factor of 3 and that will give you the correct fraction: 4/3.

Hope this helped.

5 0
3 years ago
What is the Coefficient of 10x +8
Gemiola [76]

Answer:

the coefficient is 10

Step-by-step explanation:

the 10 is by the x so 10 is the coefficient

6 0
3 years ago
Urgent help pleaseeeeeee
Helga [31]

Answer:

2x - 10 = 10 - 3x

Simplifying

2x + -10 = 10 + -3x

Reorder the terms:

-10 + 2x = 10 + -3x

Solving

-10 + 2x = 10 + -3x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3x' to each side of the equation.

-10 + 2x + 3x = 10 + -3x + 3x

Combine like terms: 2x + 3x = 5x

-10 + 5x = 10 + -3x + 3x

Combine like terms: -3x + 3x = 0

-10 + 5x = 10 + 0

-10 + 5x = 10

Add '10' to each side of the equation.

-10 + 10 + 5x = 10 + 10

Combine like terms: -10 + 10 = 0

0 + 5x = 10 + 10

5x = 10 + 10

Combine like terms: 10 + 10 = 20

5x = 20

Divide each side by '5'.

x = 4

Simplifying

x = 4

3 0
2 years ago
Read 2 more answers
Got it wrong plss help and explain
Karolina [17]
Because it says "not black" we would do white marbles
There are 15 white marbles and a total of 20
So the fraction of white marbles to total would be 15/20

Because the answer is wanted as a decimal divide 15 by 20
15/20=.75

There is a .75 chance that she will not draw a black marble
8 0
2 years ago
Find a ·
Svet_ta [14]
<span>a · b = |a| |b| cos(theta)
=|a| * 14 * cos(45)

</span>a · b |a| =3 
=>
|a| * 14 * cos(45) * |a| =3
|a| &sup2; =3/(14cos(45))
|a| = sqrt(3/(14cos(45)))
=0.63868 (approx.)

4 0
3 years ago
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