Answer:
x=26
Step-by-step explanation:
The sum of all angles in a triangle is equal to 180
x + 55 + (4x-5) = 180
Combine like terms
5x +50 = 180
Subtract 50 from each side
5x +50-50 = 180-50
5x = 130
Divide each side by 5
5x/5 =130/5
x =26
X<4 AND x>1
1<x<4
so the domain is from 1 to 4 but (1 and 4) are not included.
This is exponential decay which can be expressed as:
y=ab^t, y=final value, a=initial value, b=rate, t=time
In this case a=25000, r=(100-20)/100=0.8 so
y=25000(0.8^t), so in 4.5 years...
y=25000(0.8^4.5)
y≈$9158.93 (to nearest cent)
Answer: the first one
Step-by-step explanation:
answer a
The y intercept is where the graph crosses crosses the y axis. This occurs at x=0. Plug 0 in for x to find the y intercept.
f(0) = -32(2)^(0-3) + 3
-32*2^-3 + 3
-32 * (1/8) + 3
-4 + 3 = -1
The y-intercept is -1.