Answer:
Correct option is (C)
Step-by-step explanation:
we are given that -Tim design a pair of shorts,S, and T-shirts,t.
Tim sell Sorts for $12 and T-shirts for $8 each.
Tim can work atmost 18 hours a day so we can write 
Time taken to design a T-shirt is 30 minutes and for Shorts, it is 45 minutes.

He must design 12 itesm each day, so we can write 
Further it can be written as

Also Tim can not design more than 30 items in one day, so we can write

Hence from the above equations , its claer that

Answer:
it means that his equation is not true.
Step-by-step explanation:
-2=2 is obviously incorrect, so we must assume that the equation isn't true.
Step-by-step explanation:
sunaina's alona work=
1/6-1/10
10-6/60
4/60
1/15
therefore sunaina can alone do the work in 15 days
If it is only white and silver cars then it would me 75%
Area Y Square + Area of triangle
= 10x10+1/2x18x5
=100+9x5
=100+45
=145.