2x-7+-6x-3 2x+-6x=-4x
-4x-10=0
-5/2 is the answer
Answer: 35.2101
( Hope your day goes well :) )
Answer: 1692
Step-by-step explanation:
Formula to find the sample size :

Given : Confidence level : 
⇒ significance level =
z-value for 90% confidence interval (using z-table)=
Prior estimate of the population proportion (p) of customers who keep up with regular vehicle maintenance is unknown.
Let we take p= 0.5
Margin of error : E= 2%=0.02
Now, the required sample size will be :

Simplify , we get

Hence, the required sample size = 1692
3
the ans is 3 ---
4
cause blue is 5 times of red.