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Charra [1.4K]
3 years ago
5

Question 15 Unsaved Which biconditional is NOT a good definition? Question 15 options: A whole number is odd if and only if the

number is not divisible by 2. A ray is a bisector of an angle if and only if it splits the angle into two angles. An angle is straight if and only if its measure is 180. A whole number is even if and only if it is divisible by 2.
Mathematics
1 answer:
skad [1K]3 years ago
5 0

We see that the second definition is not a good definition. We want both parts to have the same truth value, but we see that we can have two angles created by a ray that are not equal. That means the antecedent is false but the consequence is true, which means it's not an iff statement, and a bad definition in this context.

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Can u separate ln (7+x) into ln7+lnx?
poizon [28]
No, you can not separate:
ln ( 7 + x ) ≠ ln 7 + ln x
You can separate just if you have a logarithm of multiplication.
For example:
ln ( 7 · x ) = ln 7 + ln x
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3 years ago
List the sides of ΔRST in in ascending order (shortest to longest) if m∠R = 2x+47°, m∠S = x+38°, and m∠T = 4x−52°
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Answer:

ST, RS, TR

Step-by-step explanation:

(i entered it and it was right)

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F(x) = x^2 - 16 What are the solutions for x when f of x equals 9?
andrey2020 [161]

Answer:

65

Step-by-step explanation:

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2 years ago
The hour hand on a clock is 4 cm long, and the minute hand is 10 cm long. What is the exact distance between the tips of the han
Allushta [10]

Answer:

2 sqrt(19)

Step-by-step explanation:

We know that the angle between the two hands

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We divide by 12 because there are 12 number and multiply by 2 because there are 2 number between 10 and 12

This is a triangle where we know 2 sides and the angle between them.

We can use the law of cosines to determine the third side

c^2 = a^2 + b^2 -2abcosC

Where C is the angle between sides a and b

a =4 and b = 10  C = 60  and we are looking for side c

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c^2 =16+100 - 80cos 60

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sqrt(c^2) = sqrt(76)

c = sqrt(76)

c =sqrt(4) sqrt(19)

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4 0
3 years ago
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zlopas [31]

Answer:

Eric's expression is :

20(\frac{1}{4})^w

and Andrea's is :

(1-0.5)^w

In Eric's expression, 20 represents the initial amount of substance with which he has started the experiment. \thinspace \frac{1}{4}\thinspace is the amount of substance left after each time period (in this case, each week).The variable w in this case represents the number of weeks.

Andrea's expression can be written as :

1\cdot (1-0.5)^w

The one outside of parentheses represents the initial amount of the substance. The one inside of parentheses represents 100% of the original amount of the substance. 0.5 represents the 50% of the substance that is lost each time period. The variable w in this case represents the number of weeks.

8 0
3 years ago
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