3 years ago

Could use some help?

Mathematics

1 answer:

denis23 [38]3 years ago

4 0

45 degrees because it is going to be the same as A.

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B is the midpoint of AC. What is the length of AB? AB is 9x+7 and BC is -3x+20

ahrayia [7]

<h3>Answer:</h3>

$AB = \frac{67}{4}\\$

<h3>Step-by-step explanation:</h3>

If $B$ is the midpoint of $\overline{AC}$ then $AB$ is just half of $AC$ and also, $BC$ is just half of $AC$ . This means that $AB$ must be equal to $BC$ . Essentially, $9x +7 = -3x +20$ and we can solve for the of $x$ from that equation.

$9x +7 = -3x +20 \\ 9x +7 +3x = -3x +20 +3x \\ 12x +7 = 20 \\ 12x +7 -7 = 20 -7 \\ 12x = 13 \\ \frac{12x}{12} = \frac{13}{12} \\ x = \frac{13}{12}$

Now we can solve for $AB$

$AB = 9(\frac{13}{12}) +7 \\ AB = 3(\frac{13}{4}) +7 \\ AB = \frac{39}{4} +7 \\ AB = \frac{39}{4} +\frac{28}{4} \\ AB = \frac{67}{4}$

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3 years ago

(6.8*10^4) +(9.24*10^5)

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The answer to (6.8*10^4) + (9.24*10^5) is 734

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do u still need help on this

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