Answer:
number 4-
X=11.207
Step-by-step explanation: Caculate the angle of B first. B=105
Then find side a and b
Answer:5.9-6.2x
Step-by-step explanation:
a=1.4-2x
b=-0.2x+1.7
3a+b
=3(1.4-2x)+(-0.2x+1.7)
=4.2-6x-0.2x+1.7
=4.2+1.7-6x-0.2x
=5.9-6.2x
Answer:
9
Step-by-step explanation:
4x9=36
5x9=45
6x9=54
7x9=63
(:
Answer:
A
Step-by-step explanation: