Answer:
w=4
Step-by-step explanation:
adding a negative is like subtracting so w=11-7
Answer:
The answer is 21
Step-by-step explanation:
21x4+2=86
its (a) because (a) is C(x)=3x4+30x and 9+21 is 30 so its 3x2+30
2/1 = 14/x
cross mulitply
2x=14
2x/2=14/2
x=7
The width is 7 cm