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2 years ago

Please help asap!!! It’s late!

Mathematics

2 answers:

Alex17521 [72]2 years ago

7 0

Answer:

False

True

Step-by-step explanation:

Hope this helps:)

MariettaO [177]2 years ago

7 0

Answer:

True on both.

Step-by-step explanation:

The slopes of lines do not change with dilations.

AD and A'D' are parallel.

CD and C'D' are both perpendicular to the x-axis.

True on both.

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2.3+0.02(x+20)-4.8=-9<br><br> Solve for x

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Answer:

$x=-345$

Step-by-step explanation:

$2.3+0.02\left(x+20\right)-4.8=-9$

$\mathrm{Multiply\:both\:sides\:by\:}100$

$2.3\cdot \:100+0.02\left(x+20\right)\cdot \:100-4.8\cdot \:100=-9\cdot \:100$

$230+2\left(x+20\right)-480=-900$

$\mathrm{Subtract\:}230-480\mathrm{\:from\:both\:sides}$

$230+2\left(x+20\right)-480-\left(230-480\right)=-900-\left(230-480\right)$

$2\left(x+20\right)=-650$

$\mathrm{Divide\:both\:sides\:by\:}2$

$\frac{2\left(x+20\right)}{2}=\frac{-650}{2}$

$x+20=-325$

$\mathrm{Subtract\:}20\mathrm{\:from\:both\:sides}$

$x+20-20=-325-20$

$\bold{x=-345}$

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