Answer:
x = 3 or -3
Step-by-step explanation:
So you have the equation x² - 9 = 0
Move the 9 to the other side: x² = 9
Then take the square root of both sides: 
= ±
x = ± = ±3
x = 3 or -3
3000 + 500 + 60 = 3560
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Your calculator can help you out here if you really have no idea that the exponent of 10 tells you the number of zeros: 10^3 = 1000.
We are given the equation
y = Ao (0.85)^x
Initially, at x = 0, the value of y is
y = Ao (0.85)^0
y = Ao
If the initial value was $65,000 at the same rate of depreciation, the equation would be
y = 65000 (0.85)^x
Answer:
1.7 feet
Step-by-step explanation:
R is the midpoint of QS, so RS = 4 feet.
Using sine:
sin 25° = RT / 4
RT = 4 sin 25°
RT ≈ 1.7
Answer:
Step-by-step explanation:
1+3+4 = 8
480 / 8 = 60
60 x 1 = 60 (concrete)
60 x 3 = 180 (sand)
60 x 4 = 240 (gravel)
60:180:240
