Thank you posting your questions on Brainly.
One way to simplify 3^2 x 3^5 is to add the exponents. In your case you would add ^3 + ^5 which equals ^7. You keep the whole number, 3, the same. Thus, your answer would be 3^7.
Hope this helps! :) (Don't forget Brainliest)
I'll solve 21, and you then should be able to solve the rest on your own!
Since ADC is 135, that means that that whole angle is 135 degrees. In addition, since angles ADB and BDC add up to ADC, we get ADB+BDC=ADC=135=11x+9+7x=18x+9. Subtracting 9 from both sides, we get 126=18x. Dividing both sides by 18, we get x=7. Plugging that into 11x+9=BDC, we get 11*7+9=77+9=86
Hmm that’s a good question
