Answer:
x= 37.5°
Step-by-step explanation:
∠CBD
= 180° -75° (adj. ∠s on a str. line)
= 105°
∠BCD= ∠BDC (base ∠s of isos. △BCD)
∠BCD= x
∠BCD +∠BDC +∠CBD= 180° (∠ sum of △BCD)
x +x +105°= 180°
2x= 180° -105°
2x= 75°
x= 37.5°
<u>Alternative</u><u> </u><u>working</u><u>:</u>
∠BDA= (180° -75°) ÷2 (base ∠s of isos. △ABD)
∠BDA= 52.5°
∠BDA +∠BDC= 90°
52.5° +x= 90°
x= 90° -52.5°
x= 37.5°
Answer: (v - 9)^2 - 81
Step-by-step explanation: Use the formula (b/2)^2 in order to create a new term to complete the square.
Hope this helps! :) ~Zane
Answer:
The function of f(x) is 20 for the middle problem idk the others
Step-by-step explanation:
Answer:
-4y - 7
Step-by-step explanation:
Combine like terms. Note that there is one term with a variable (y), and two constant terms. Combine the constant terms. Note that one positive and one negative sign will result in a negative sign:
-4 + (-3) = -4 - 3 = -7
-4y - 7 is your answer.
~
Answer:
300 square units
Step-by-step explanation:
explanation-because i just know