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Murljashka [212]
3 years ago
12

What are the least common multiples of 7 and 11

Mathematics
1 answer:
Luda [366]3 years ago
3 0
I think is the least common number is 77 because it multiple of 7 and 11 both
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What is the 38th term of the arithmetic sequence of 21, 14, 7,..
kodGreya [7K]

Step-by-step explanation:

First term (a) = 21

common difference (d) = 14-21= -7

general equation for nth term = a+(n-1)d

The 38th term of the AP= 21+(38-1)(-7)

= 21+(37)(-7)

= 21 −259= −238

8 0
3 years ago
Substance A decomposes at a rate proportional to the amount of A present. ​a) Write an equation relating A to the amount left of
horrorfan [7]

Answer:

Step-by-step explanation:

a) The equation relating A to the amount left of an initial amount Upper A 0 after time t is

A(t) = A0e^(kt)

b) It is found that 18 lb of A will reduce to 9 lb in 4.2 hr. It means that

A0 = 18

A = 9

t = 4.2

Therefore, substituting into the formula, it becomes

9 = 18e^(4.2k)

9/18 = e^(4.2k)

0.5 = e^(4.2k)

Taking ln of both sides of the equation, it becomes

Ln0.5 = ln e^(4.2k)

- 0.693 = 4.2k

k = - 0.693/4.2

k = - 0.165

The equation becomes

A(t) = 18e^(- 0.165t)

For A = 1(1 lb left), then

1 = 18e^(- 0.165t)

1/18 = e^(- 0.165t)

0.056 = e^(- 0.165t)

Taking ln of both sides, it becomes

Ln0.056 = ln e^(- 0.165t)

- 2.88 = - 0.165t

t = - 2.88/-0.165

t = 17.5 hours

After 17.5 hours, 1 lb would be left

7 0
3 years ago
15:3 in simplest form
sesenic [268]

Answer:5:1

Step-by-step explanation: Divide 15:3 by common factors to get 5:1

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2 years ago
Can anyone help me understand this assignment
sveticcg [70]

Step-by-step explanation:

I know you said to help but I did everything, just adjust the reasons like how your teachers give them I abbreviated mine

5 0
2 years ago
If (6^2)^x equals 1, what is the value of x
ValentinkaMS [17]

Answer:

x = 0

Step-by-step explanation:

If p is a number other than zero, then

p^x=1

only if x=0.

8 0
3 years ago
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