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2 years ago

Help please explain answer.

Mathematics

1 answer:

Helga [31]2 years ago

7 0

Answer:

A. 20

Step-by-step explanation:

Firstly, you have an equation where x is unknown.

It is said to find the result of this equation if x is 5.

That means you have to substitute 5 instead of x in your equation.

That will be:

3*5+4*5-15

When you calculate that, you get number 20.

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Answer:

b. No

Step-by-step explanation:

Represent

Square Pizza with S

Soft Drink with D

Such that

$P(S) = 49\%$

$P(D) = 71\%$

$P(S\ and\ D) = 38\%$

Required

Determine if events S and D are independent

Two events S and D are independent if:

$P(S\ and\ D) = P(S) * P(D)$

Substitute values for P(S) and P(D)

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Convert to decimals

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$P(S\ and\ D) = 0.3479$

Convert to percentage

$P(S\ and\ D) = 0.3479 * 100\%$

$P(S\ and\ D) = 34.79\%$

The calculated P(S and D) is not equal to 38%

Hence, the events are not independent.

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