Answer:
C. 10
Step-by-step explanation:
5+5=10
10+10=20
10+20=30
Answer: $7.
Step-by-step explanation:
It is given that the printing company charges a certain amount for each shirt plus a setup fee of $40.
Let x be the cost of each t-shirt.
There are 21 students in the drama club. So, total cost of 21 t-shirts is

It is given that the t-shirt order costs a total of $187.



Divide both sides by 21.


Therefore, the cost of each t-shirt is $7.
B and D because there are the reverse of 67 + 38 = 105.
Hope that helps :)
Because it's a positive number that can be gained by multiplying two smaller positive numbers.
Step-by-step explanation:
cho f(t)=(t-4)u(t-2)phep bien doi laplace la
F(s)=e^-2s/s^2-2e^-2s/s62