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3 years ago

Multiply and simplify.

Mathematics

1 answer:

Igoryamba3 years ago

4 0

$(2x-1)(6x-7)=2x\cdot 6x-2x\cdot7-1\cdot 6x+1\cdot7=\\\\=12x^2-14x-6x+7=\boxed{12x^2-20x+7}$

Answer D.

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17=5k-2 what Is (k) help me please

MAXImum [283]

17=5k-2
add 2 to both sides
19=5k
divide both sides by 5
19/5=k
19/5=3 and 4/5

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3 years ago

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What is -2(-y) in expanded form

damaskus [11]

Answer:

Step-by-step explanation:

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2 years ago

Can someone answer this please? Thanks! :)

Wittaler [7]

The Correct Answer is : 4x - 4 * 2

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3 years ago

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Find two numbers a and b whose sum a+b is −1, and whose difference a−b is 1.

fiasKO [112]

The a is 1 and the b is 0

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2 years ago

Out of a group of 120 students that were surveyed about winter sports 28 said they ski 53 said they snowboard Sixteen of the stu

hjlf

Answer:

P ( snowboard I ski) = 0.5714

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Ski

Event B: Snowboard.

28 out of 120 students ski:

This means that $P(A) = \frac{28}{120} = 0.2333$

16 out of 120 do both:

This means that $P(A \cap B) = \frac{16}{120} = 0.1333$

P ( snowboard I ski)

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.1333}{0.2333} = 0.5714$

P ( snowboard I ski) = 0.5714

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3 years ago

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