5a - 4a = -9 - 8a
a = -9 - 8a
9a = -9
a = -1
Step-by-step explanation:
d = z - 9
d = 10 - 9 ----> substitute
d = 1
Hello from MrBillDoesMath!
Answer:
See below
Discussion:
Triangles BAD and BCD are congruent by the SAS postulate.
* Side AD = DC because BD is the perpendicular bisector of AC.
* Angle ADB and CDB are both right angles, and hence equal, because
BD is the perpendicular bisector of AC)
Corresponding parts of congruent triangles are equal so angle BAD = angle BCD, which was to be proven.
Regards,
MrB
You have to multiply the price by the quantity and you will find the total cost.
1.43 * 22 = 31.46
