Answer:
In year 1986 the average cost of car is $12,000
Step-by-step explanation:
Cost function:
C = 30.5t² + 4192
Cost = $12,000
Find:
Year
Computation:
C = 30.5t² + 4192
12,000 = 30.5t² + 4192
t = 16 year
So,
Year 1970 + 16 year
1986
So, In year 1986 the average cost of car is $12,000
1.) r=-1/3
2.) x=-33/29
3.) x=-4/5 x=2/5
Answer:
Yes, that is correct.
Step-by-step explanation:
Armans age : x
Aregs age: y
X = 5y
(15 - 12) = y. They said narek is 12 years older than areg so you deduct 12 years from nareks age which is 15.
So therefore y = 3. So Areg is 3 years old.
Since we know that y = 3
X = 5(3)
X = 15
So therefore Arman is 15 years and Areg is 3 years.
Answer:
x = 2
y = 2
Step-by-step explanation:
Given that:
y=7x- 12 -------- eq1
-3x+4y=2 ------ eq2
eq1 can be written as:
7x - y = 12
Multiplying this equation by 4 we get:
28x - 4y = 48 --------- eq3
Adding eq2 and eq3 we get:
28x - 3x = 48+ 2
25x = 50
x = 2
Now put this equation in eq1
y = 7(2) - 12
y = 14 - 12
y = 2
i hope it will help you!
