Eloise made these steps well:
Square root of negative 2x plus 1 - 3 = x
Square root of negative 2x plus 1 - 3 + 3 = x + 3
The error comes in the next step:
Square root of negative 2x plus 1 = x + 3
Square root of negative 2x plus 1 -1 = x + 3 - 1
Square root of negative 2x = x + 2
the number one is inside the root, therefore they can not be subtracted.
answer
error in the step:
Square root of negative 2x = x + 2
Answer: A
Graph cut the horizontal and vertical axis at 2 points A(0;5) and B(1.66666;0)
you calc x=0 in the answer and have y
you can choose A or B. Next, you calc y=0 into A,B. If x=1.6666666, your answer is A
Sorry about my bad english
Answer:
10
Step-by-step explanation:
Answer:
first sub in (0,-2) to get
-2 = ab^0, but b^0 = 1
so a=-2
so far we have
y = -2b^x
now use the other point (2,-50)
-50 = -2(b^2)
b^2 = 25
b= ±5
however in exponentional equations the base is usually positve, so now you have
y = -2(5^x)
sub in x=-2 and you got it.
Step-by-step explanation:
hope it helps..
