x = 7 and x = –7.
Solution:
Given data:
and 
To find the solutions when f(x) = 64.
Both are equations of f(x), so equate the given equations, we get
To isolate the constant term subtract 15 from both sides.
49 can be written as 7².
Taking square root on both sides of the equation, we get
x = ±7
The solutions to f(x) = 64 is x = 7 and x = –7.
Answer:
Step-by-step explanation:
Given
--- Missing from the question
Required
Identify a and b
The given equation is an exponential function and the general form is:
When is compared to
We have that: and
Answer:
(10, -20).
Step-by-step explanation:
y= -5x + 30
x = 10
Substitute x = 10 in the first equation:
y = -5*10 + 30
y = -50 + 30
y = -20.
So the solution is (10, -20).
Answer: 6.5
Step-by-step explanation:
Answer:
The length of the shadow is 4ft long.
Step-by-step explanation:
6ft divided by 3ft equals 2ft. Then, multiply 2ft by 2ft equals 4ft long.
