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3 years ago

Who do I find the percent of a number

Mathematics

2 answers:

lions [1.4K]3 years ago

8 0

Say you wanted to find 13% of 23.

13% = .13

23 • .13 = 2.99

13% of 23 = 2.99

expeople1 [14]3 years ago

3 0

Always divide by 10 first, for example; if it was 10% of 20 you would divide 20 by 10 to get 2. If it was 20% of 40 you would divide by 10 to get 4 then times by 2 to get 8.

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For each of the following, use logic laws to decide whether the statement is a tautology contradiction, or neither. a (a) (A B)

spayn [35]

Answer:

The statement $(A\rightarrow \lnot B)\land (B\rightarrow A)$ is a contingency.

The statement $(P\rightarrow \lnot P)\land P$ is a contradiction.

Step-by-step explanation:

A tautology is a proposition that is always true.

A contradiction is a proposition that is always false.

A contingency is a proposition that is neither a tautology nor a contradiction.

a) To classify the statement $(A\rightarrow \lnot B)\land (B\rightarrow A)$ , you need to use the logic laws as follows:

$(A\rightarrow \lnot B)\land (B\rightarrow A) \equiv$

$\equiv (\lnot A \lor\lnot B)\land(\lnot B \lor A)$ by the logical equivalence involving conditional statement.

$\equiv (\lnot B\lor \lnot A )\land(\lnot B \lor A)$ by the Commutative law.

$\equiv \lnot B \lor (\lnot A \land A)$ by Distributive law.

$\equiv \lnot B \lor (A \land \lnot A)$ by the Commutative law.

$\equiv \lnot B \lor F$ by the Negation law.

Therefore the statement $(A\rightarrow \lnot B)\land (B\rightarrow A)$ is a contingency.

b) To classify the statement $(P\rightarrow \lnot P)\land P$ , you need to use the logic laws as follows:

$(P\rightarrow \lnot P)\land P \equiv$

$\equiv (\lnot P \lor \lnot P)\land P$ by the logical equivalence involving conditional statement.

$\equiv P \land (\lnot P \lor \lnot P)$ by the Commutative law.

$\equiv (P \land \lnot P) \lor (P \land \lnot P)$ by Distributive law.

$\equiv F \lor F \equiv F$ by the Negation law.

Therefore the statement $(P\rightarrow \lnot P)\land P$ is a contradiction.

8 0

3 years ago

Help me with this math question

nasty-shy [4]

Answer:

$\huge \boxed{K=20}\checkmark$

B. 20

Step-by-step explanation:

First, you divide by 5 from both sides of equation.

$\displaystyle \frac{5k}{5}=\frac{100}{5}$

Simplify, to find the answer.

$\displaystyle 100\div5=20$

$\huge \boxed{K=20}$ , which is our answer.

6 0

3 years ago

Read 2 more answers

The line of best fit is also known as the _

bearhunter [10]

Answer:

the regression line

Step-by-step explanation:

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2 years ago

Goran and karen walk around a track . goran walks each lap in 10 minutes. karen walks each lap in 6 minutes. they both start at

Nimfa-mama [501]

Goran completes 6. karen completes 10. it takes 60 minutes

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3 years ago

Which of the following points is in the solution set of y>-x² + 5?

eimsori [14]

Uh I did not learn this yet but I think The answer is 2,4

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3 years ago