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2 years ago

3(5x+2y) without parentheses.I would love help on this question

Mathematics

2 answers:

Nady [450]2 years ago

6 0

Answer:

15x+6y

Step-by-step explanation

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Lady_Fox [76]2 years ago

3 0

Answer:15x+6y

Step-by-step explanation:3x5 and 3x6

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What is the answer to M+9=2

Ierofanga [76]

Answer:

M= -7

Step-by-step explanation:

M+9=2

M =2-9

M=-7

3 0

3 years ago

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Use the Counting Principle to find the probability. Choosing the 7 winning lottery numbers when the numbers are chosen at random

frozen [14]

Answer: 120

<u>Step-by-step explanation:</u>

Since the order of the numbers doesn't matter we can use the formula:

$\dfrac{n!}{r!(n-r)!}\quad \text{where n is the quantity of items and r is the quantity chosen}\\\\\text{In this problem, there are 10 numbers (n = 10) and 7 to be chosen (r = 7)}\\\\_{10}C_{7}=\dfrac{10!}{7!(10-7)!}\\\\.\qquad=\dfrac{10!}{7!3!}\\\\.\qquad=\dfrac{10\times 9\times 8\times 7!}{7!\times 3\times 2\times 1}\\\\.\qquad=10\times 3\times 4\\\\.\qquad=120$