Answer:
To get system B, the SECOND equation in system A was replaced by the sum of that equation and the FIRST equation multiplied by FOUR. The solution to system B IS de same as the solution to system A
Step-by-step explanation:
x-y=3 equation 1
-2x+4y=-2 equation 2
so, multiplying by four the equation 1 we have
4x-4y=12 equation 3
later sum equation 3 and equation 2 we have
2x=10
You would use the equation y = A(1+r)^t
A = Original amount = 200
r = interest rate = 0.042 (when converted from percent to decimal)
t = time = x
Plug them in and you get the model: y = 200(1+0.042)^x
or just simplify the parentheses to (1.042)
Answer:
23.590 feet
Step-by-step explanation:
The mnemonic SOH CAH TOA reminds you of the relationship between trig functions and sides of a right triangle:
Tan = Opposite/Adjacent
Here, that means ...
tan(65°) = height/(11 ft)
Multiplying by 11 ft, we get ...
height = (11 ft)tan(65°) ≈ 23.5896 ft
height ≈ 23.590 ft
I think the answer is 666.
2050-940=1110
1110/5=222
222x3=666
