This falls under geometry. The two labeled angles are congruent, which means the line segment between them (AD in the image) is a bisector of the angle at vertex A. Use the angle bisector theorem, which says that

$\dfrac{BD}{DC}=\dfrac{AB}{AC}\iff\dfrac{12}{(5+9x)-12}=\dfrac{15}{25}$

$\dfrac{12}{9x-7}=\dfrac35$

$20=9x-7$

$x=3$

8 0

3 years ago

Name the congruent angles.

Sliva [168]

The answer is: [C]: " ∡C ≅ ∡X ; ∡D ≅ ∡Y ; ∡A ≅ ∡Z " .
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7 0

3 years ago

PLZ ANSWER NUMBERS 8 AND 9. SHOWS YOUR WORK TOO!!!!

ASHA 777 [7]

8. 3x-4>38
3x>38+4
3x>42
x>42/3
x>14
So the answer is A. x>14

9. It's A. Two less than four times a number is 12. Because 4x (four times) and also it says 2 less than 4 times a number...

3 0

3 years ago

R(x) = (500 + ax) (50 - bx)

o-na [289]

Answer:

−

500

−

√

250000

2500

−

100

1000

50000

Step-by-step explanation:

4 0

3 years ago