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nikitadnepr [17]
3 years ago
7

A 18 gram sample of a substance that's used to detect explosives has a k value of0.125

Mathematics
1 answer:
mr Goodwill [35]3 years ago
4 0
T1/2 = ln 2 / k = ln 2 / 0.125 = <span>5.5</span>
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Mai and Tyler work on the equation 2/5 b + 1 = -11 together. Mai’s solution is b= -25 and Tyler’s is b = -28 Here is their work.
alisha [4.7K]

Answer:

<em>I disagree with both solutions. The value of b that will make the expression correct is -30</em>

Step-by-step explanation:

Given the equation solved my Mai and Tyler expressed as:

2/5 b + 1 = -11

We are to check the veracity of the solutions;

2/5 b + 1 = -11

Subtract 1 from both sides of the expression

2/5 b + 1 -1 = -11-1

2/5 b = -12

Cross multiply

2b = -12 * 5

2b = -60

Divide both sides by 2

2b/2 = -60/2

b = -30

<em>Since the solution b = -25 and -28 does not tally with the gotten solution, I disagree with the both solutions</em>

6 0
3 years ago
A drawer contains 12 brown socks and 12 black socks, all unmatched. a man takes socks out at random in the dark. the least numbe
Serga [27]
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6 0
3 years ago
What is the measure of ∠x?
Dima020 [189]
The angle is a complementary angle so both angles add up to 90 degrees

Therefore set your equation equal to 90 to find angle of x

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Subtract 53 from both sides

X= 37 degrees
6 0
3 years ago
What is 4x+5x+3+10 simplified?
cricket20 [7]
Short Answer: 9x + 13


Step by Step:

4x + 5x = 9x

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Hope this helps!
5 0
3 years ago
What are the coordinates of vertex J of the pre-image?(14 POINTS. PLS HELP, GEOMETRY)
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If we look at where it is now, we would have multiplied the x and y values by 1/2. since we are working backwards, lets multiply by 2 instead...giving us the vertex for the pre-image....

J is now (0, -2)      multiply by 2
J was     (0, -4)
5 0
3 years ago
Read 2 more answers
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