3 years ago

Which expressions are equivalent to 3(-2a-4)+3a

Mathematics

2 answers:

Vesnalui [34]3 years ago

5 0

-6a - 12 + 3a is the correct answer

AURORKA [14]3 years ago

3 0

-6a-12+3a is the right answer

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Step-by-step explanation:

We have the distance formula: $d = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}$ . We can plug in $4\sqrt{2}$ = d, x2 = 6, x1=2, y2 = 7, y1 = k.

Then, we can solve the question using some algebra to find that k = 3.

Edit: Here is a step by step:

$4\sqrt{2} = \sqrt{(6-2)^2 + (7-k)^2}\\$

$(4\sqrt{2})^2 = (6-2)^2 + (7-k)^2$

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$16 = (7-k)^2$

$\sqrt{16} = (7-k)$

$4 = 7-k$

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