Answer:
C)
Step-by-step explanation:
In a parallelogram, if one angle is 90 (right angle), then it is a rectangle
1) 48
2) 168
3) 400
4) 126
5) 48
6) 154
7) 270
8) 144
The product is: 25x^2-5xy-6y^2
The answer is 3
Multiply 6 by 3 to get the total amount of money for the books then minus the answer 18 which you get from 6 x 3 = 18
Then minus 18 from 21 to get $3
21 - 18 = 3
In rhombus the opposite angles are congruent and diagonals bisect angles,
so we can write
a+26+26=180
a=180-(26+26)=128
Answer: a= 128.