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2 years ago

Find the measures of the angles of the ∆ABC if m∠A : m∠B:m∠C=2:3:4

Mathematics

1 answer:

dsp732 years ago

3 0

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A new vaccine claims to reduce the risk of contracting chickenpox from 80% to 20%. Which of the following statements is true reg

dlinn [17]

Answer:

The vaccine decreases the risk of contracting chickenpox by 75 percentage

Step-by-step explanation:

Risk of contracting chickenpox is reduced from 80% to 20%.

This reduction in percentage is:

(80 - 20)/80*100% = 75%

Correct choice is:

The vaccine decreases the risk of contracting chickenpox by 75 percentage

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3 years ago

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3 years ago

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mash [69]

Answer:

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Step-by-step explanation:

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3 years ago

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attashe74 [19]

Answer:

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Step-by-step explanation:

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1 year ago

Multiply. (d+7)(d-7) Simplify your answer.

romanna [79]

Answer:

$\huge\boxed{(d+7)(d-7)=d^2-49}$

Step-by-step explanation:

$\bold{METHOD\ 1:}\\\\(d+7)(d-7)\qquad|\text{use}\ (a+b)(a-b)=a^2-b^2\\\\=d^2-7^2=d^2-49\\\\\bold{METHOD\ 2:}\\\\(d+7)(d-7)\qquad|\text{use FOIL}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=(d)(d)+(d)(-7)+(7)(d)+(7)(-7)\\\\=d^2-7d+7d-49\qquad|\text{combine like terms}\\\\=d^2+(-7d+7d)-49\\\\=d^2-49$

7 0

2 years ago