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2 years ago

7+(8+12)=____+12? Which property was used?

2 answers:

3 0

I know the number ypu have to fill in would be 15 I believe that is the commutative or associative property or something with addition

Inessa05 [86]2 years ago

3 0

If is distributive property

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What is the product of (3x + 1)(3x – 4)? Step by step.

kvasek [131]

Answer:

9x^2-9x-3

Step-by-step explanation:

3x*3x=9x^2

3x*-4=-12x

1*3x=3x

1*-4=-3

9x^2-12x+3x-3

9x^2-9x-3

7 0

3 years ago

Read 2 more answers

In ΔABC, which trigonometric ratio equals 32?

Nezavi [6.7K]

The given answer should be "3/2", its because "32" is not possible in anyway..

tan C = sin C / cos C

Where sin C = 3 / 3.61

And

cos C = 2 / 3.61

Now

tan C = (3 / 3.61) / (2 / 3.61) = (3 / 3.61) x (3.61 / 2) = 3 / 2

Thus tan C is the correct choice.

6 0

2 years ago

The cosine law

romanna [79]

$\bf \textit{Law of sines}
\\ \quad \\
\cfrac{sin(\measuredangle A)}{a}=\cfrac{sin(\measuredangle B)}{b}=\cfrac{sin(\measuredangle C)}{c}\\\\
-------------------------------\\\\$

$\bf \cfrac{sin(88^o)}{39.9}=\cfrac{sin(A)}{31}\implies \cfrac{31\cdot sin(88^o)}{39.9}=sin(A)
\\\\\\
sin^{-1}\left[ \cfrac{31\cdot sin(88^o)}{39.9} \right]=sin^{-1}\left[ sin(A) \right]
\\\\\\
sin^{-1}\left[ \cfrac{31\cdot sin(88^o)}{39.9} \right]=\measuredangle A
\\\\\\
50.93841^o\approx \measuredangle A\qquad thus\qquad \measuredangle C\approx 41.0619^o$

3 0

3 years ago

An ancient Roman coin is found and a curious anthropologist wishes to determine if the coin is fair— Fair meaning that when flip

Mamont248 [21]

The coin wouldn't be fair, because it landed on heads 72/100 times. If the coin was fair, the results should be equivalent to 1/2.

7 0

3 years ago

Read 2 more answers

2x + 3x + 5 = I need the answer asap

madam [21]

In simplified form it is 5x+5

4 0

2 years ago